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0631E4

Network Administrator

E-4 (Specialist/Corporal) · Marines

E1–E3E-4E-5E-6E-7E8–E9
HEADS UP

You are the network NCO the section chief stops babysitting. The ACAS findings on your segment are yours to brief — not pass back up. The Sgt board is running on composite scores while you are standing up LANs; the Marine who forgets to track the math gets surprised at the cutting-score check and wonders where 18 months went.

The Honest MOS Read
Cpl in the 0631 community is where accountability becomes personal. You are the team leader for two to four junior techs, and the section chief's read of your section's ACAS compliance percentage, your team's HBSS dashboard, and the trouble-ticket close rate is his read of you — not of them. They are Pvts and LCpls. Their mistakes are your teaching opportunities. Your mistakes are your failures. The technical load at Cpl is the same technical baseline you built at the junior enlisted tier, but the accountability picture has expanded. You now brief the network stand-up plan to your team, not receive it. You run the PCC/PCI before a field operation, not walk through it with someone else checking your work. You read the ACAS scan output after the field op and identify the highest-severity findings before the section chief asks what the remediation timeline is. The firewall ACL is the Cpl's technical ownership test. A junior tech configures switches and provisions accounts. The Cpl configures perimeter firewall rules, validates the NIPR/SIPR boundary architecture, and ensures that no overly permissive rule set is hiding in a 200-line access control policy. An any/any rule in the firewall policy that the ISSM finds on inspection day is a CAT I finding — and the section chief wants to know who approved the rule, not who configured it. VoIP provisioning is the other technical territory that distinguishes the Cpl from the junior tech. IP phones on the garrison and tactical LAN require VLAN tagging, QoS marking, and DHCP scope configuration that is straightforward when the LAN is running and diagnostic when it is not. The Cpl who can troubleshoot a VoIP registration failure at the forward command post at 2200 — while the battalion commander is waiting for the command post to come up — is the Cpl who earns the section chief's recommendation to the Sgt board. The leadership load at Cpl is the Corporals Course curriculum translated into daily practice. Monthly proficiency and conduct marks on each of your junior techs. CARPs signed off when they complete NAVMC 3500.44 individual tasks. Formal counseling when a Marine is in trouble — not a verbal conversation in the hallway, but a documented counseling with the Marine's signature on file. The section chief is watching whether you handle these administratively correctly or let them slide. The composite score is the Cpl's parallel career responsibility. Under MCO P1400.32, the cutting score for 0631 to Sgt fluctuates with MOS manning levels and the promotion pool. You need to know where the current cut sits, where your composite score sits, and what you can do this quarter to close the gap. Every 1st-Class PFT, every MCMAP belt, every college credit through Tuition Assistance, every award packet your section chief submits on your behalf — these are composite score inputs. The Cpl who tracks the math monthly is the Cpl who pins Sgt on timeline.
Career Arc
  • 01Pin Cpl via cutting score under MCO P1400.32 — Corporals Course complete, composite above the current cut.
  • 02First team lead assignment: two to four junior techs, full ownership of the team's ACAS findings and HBSS compliance posture.
  • 03First independent forward command post LAN stand-up as the primary NCO — section chief reviews the network diagram and sign-off after, not during.
  • 04Proficiency and conduct marks monthly on each junior Marine — the section chief reviews your entries and teaches you what 'specific' means.
  • 05Sgt board composite score tracked monthly — cutting score for 0631 to Sgt pulled from TFRS / MARADMIN before asking the section chief where you stand.
  • 06Sergeants Course slot pulled and scheduled — the Sgt board does not wait for your calendar.
Common Screwups
  • ×An undocumented firewall rule change that breaks connectivity at the battalion command post. The change-management process — written request, ISSM-reviewed, documented rollback — exists because 'I knew what I was doing' is not a rollback procedure. The Cpl who makes undocumented changes is the Cpl who explains the outage to the S6 without a paper trail to support him.
  • ×NJP for conduct off-duty. A Cpl with an Article 15 is a Cpl whose Sgt board timeline just extended by at least a promotion cycle — conduct marks that reflect NJP torpedo the composite score and the section chief's recommendation in the same quarter.
  • ×Fraternization with junior Marines in the section. The NCO-enlisted boundary is not a suggestion; a Cpl who blurs the line with his own techs creates a command-climate problem that the platoon sergeant and company gunny manage — at the Cpl's expense.
  • ×Falsifying a CARP or signing off a task evaluation the Marine did not actually complete to the standard. Fraud in training documentation is a UCMJ-eligible offense and a clearance-relevant finding; the section chief who discovers it does not hand it back for correction.
  • ×Letting the composite score drift without tracking it — then sitting in the section chief's office at the two-year mark surprised that the cutting score moved. Pull the TFRS cutting score every month, not at reenlistment time.

A Day in the Life

  • 0500Wake. Phone check — any alerts from the HBSS console overnight? Any junior Marine in the section group chat with an issue? None? PT uniform on.
  • 0530PT formation. You take accountability for your team — your two to four junior techs — and report to the section chief (Sgt) or platoon sergeant (SSgt). Missing Marine is your problem, not theirs.
  • 0545-0700Unit PT. The section runs the same schedule as the communications company. You pace the front of your team's formation on run days. On ruck days you are carrying your share. The junior tech who cannot keep pace with you has a fitness counseling coming — you do not wait for the platoon sergeant to notice.
  • 0700-0830Hygiene, chow, change into utilities. Before morning formation: check the HBSS console for overnight non-compliance alerts, pull the trouble-ticket queue for anything open from yesterday, confirm the day's work assignments align with the section chief's priorities.
  • 0830Morning formation. The section chief puts out the day's tasking and the week's training schedule updates. You confirm your team's task and assignment, brief the task to your team with the specific plan before they touch gear.
  • 0900-1130Work period. In garrison: switch provisioning, patch management runs, ACAS remediation, account audits, VoIP phone troubleshooting, maintenance log entries. You are supervising the team's execution and doing the more complex technical work — firewall rule review, ACAS scan triage, access-control audit — that the junior techs are not yet signed off on.
  • 1130-1300Chow. As an NCO you sit with the section's Cpls. The platoon's NCO chow-hall dynamic is where you hear what the section chief and platoon sergeant are focused on this week — information that filters to your team the right way.
  • 1300-1500Afternoon work period. Continue technical work or shift to administrative responsibilities: pro/con marks on your junior Marines, task evaluation documentation, CARP sign-offs. Formal counseling session with a junior Marine if one is warranted — written, signed, on file.
  • 1500-1600Final formation. Section chief gives tomorrow's schedule. Sensitive items accountability check — your team runs the count, you sign the aggregate to the section chief. 3x5 card to each junior tech with tomorrow's priorities.
  • 1600Liberty call if the section is on garrison schedule. Field op prep, ranges, and duty break this.
  • 1700-2000Personal time. Study for Security+ or CCNA if you are on the certification track. MCMAP mat time if you are working Brown Belt. College course through Tuition Assistance. The composite score inputs that feed the Sgt board are built during this window.
  • 2000-2200If a junior Marine in your team calls with a problem, you pick up. The financial issue, the landlord dispute, the car that broke down on the highway — these are your calls to route. You are not solving them; you are routing the Marine to the office that can. CFS for financial issues, legal assistance for lease disputes, the section chief for anything that requires a senior intervention.
  • 2200Lights out.

Weekly Cadence

The Cpl's week runs on the section's work order and the team's output. Monday is the planning and assessment day — the section chief puts out the week's priorities and you translate them into task assignments for your team with specific deliverables and timelines. The ACAS scan from the weekend automated run is reviewed before the morning update brief; any new CAT I findings are triaged and a remediation plan is ready to report before the section chief asks. Tuesday through Thursday is the execution rhythm. Technical work during shop hours, NAVMC 3500.44 individual task evaluations when the section chief has scheduled them, MCMAP mat sessions on the section's dedicated training day, and the administrative work that runs in parallel — pro/con marks, CARPs, formal counseling documentation when warranted. The Cpl who can run both the technical work and the administrative layer simultaneously, without letting either slip, is the Cpl whose name appears on the section chief's Sgt board recommendation. Friday is accountability day — close the week's trouble tickets, update the team's task tracking, update the network diagram if anything changed during the week, confirm the weekend duty roster assignments, and give each junior tech a verbal debrief on what went well and what the correction is for next week. The good Cpl runs this without the section chief prompting it. The section chief who does not have to prompt his Cpls is the section chief who can trust them with the forward command post — and that trust is the foundation of every Sgt board recommendation.

Key Skills — How to Drill Each

  1. 01
    Brief a network stand-up tasking to a two-to-four person team — IP addressing plan, VLAN assignments, switch roles, firewall ACL requirements, NIPR/SIPR boundary verification — from the communications plan without the section chief in the room.
    Build the brief from the communications plan's network annex — it tells you the IP address space allocated, the VLAN structure, and the boundary architecture. Walk your team through it on a terrain model or a whiteboard before you touch a single cable. The two-person verification of the NIPR/SIPR boundary is named in the brief with the two names on it. When the section chief reviews the network diagram after the stand-up, he should see that the brief matched the execution — and that the team executed it without a follow-up call from you.
  2. 02
    Run a PCC/PCI for a network field kit — switches, routers, cables, power, labeling — as a real inspection with consequences, not a head-nod ritual.
    The PCC is your check. The PCI is your team's check with you watching. Both have a printed checklist, both have a signature block, and both are done in sequence — not simultaneously while loading the truck. The item that does not appear on the checklist does not exist as far as the section chief is concerned. If you find a missing cable or a switch with a bad SFP during the PCI rather than at the forward command post site, the checklist worked. If you find it at the site, the checklist failed.
  3. 03
    Analyze an ACAS vulnerability scan, triage findings by STIG severity category (CAT I / II / III), and build a remediation priority list the section chief can brief to the S6.
    The ACAS report is a list sorted by severity, but severity alone is not the remediation order — some CAT IIs on a network boundary device are more operationally consequential than a CAT I on a low-traffic endpoint. Triage by severity first, then by operational impact: devices in the command post path get remediated before devices in the administration section. The list you hand the section chief has three columns — finding, affected device, remediation action and timeline — and it is ready to brief before he asks for it.
  4. 04
    Configure a perimeter firewall ACL for a forward command post LAN — required traffic, denied traffic, logging enabled — without leaving an overly permissive any/any rule hiding in the policy.
    Write the required traffic in the policy first — the IP addresses and ports that the communications plan specifies need to pass. Then add the explicit deny statements. Then read the policy from top to bottom looking for any rule that is broader than the communications plan requires. An any/any rule, a source-any that was a temporary workaround, a destination-any that nobody meant to leave — these are the CAT I findings the ISSM catches because you did not catch them first. Read the policy from the bottom before you save it.
  5. 05
    Provision, configure, and troubleshoot VoIP phones on the garrison and tactical LAN — VLAN tagging, QoS marking, DHCP scope — in the time the communications order allows.
    VoIP troubleshooting under time pressure — the battalion commander needs his command post phone functional in 90 minutes — is the test of whether you understand the VoIP architecture or just follow the provisioning checklist. Know the failure modes: VLAN mismatch (phone gets the data VLAN instead of the voice VLAN, does not register), DHCP scope exhaustion (scope is full, phone gets no address), QoS misconfiguration (voice traffic is being dropped by the switch because it is not marked). Run through the diagnostic steps in order before you start swapping cables.
  6. 06
    Train junior techs on NAVMC 3500.44 individual network tasks, evaluate them against the task standard, and sign the CARP.
    The training evaluation is not a quiz — it is a task execution under standard conditions with a go/no-go result. Walk the junior tech through the task standard from the T&R Manual before the evaluation so he knows what 'complete' looks like. Then observe the execution without coaching. If he fails a step, note it specifically — which step, what the error was, what the correct action is. Sign the CARP with a pass only when the task is executed to standard. A CARP with your signature on a task the Marine did not complete is fraud in the training record.

Manuals & References — What Chapters Matter

  • NAVMC 3500.44 — Communications T&R Manual
    At Cpl you are the primary signer on your team's CARPs — which means you need to know the individual task standards well enough to evaluate them, not just execute them. Pull the 1000-level individual tasks for 0631 and walk each one with your junior techs. The team's T&R readiness percentage is what the section chief reports to the S6 at the monthly readiness review — and your team's percentage has your name on it.
  • DISA STIGs — Security Technical Implementation Guides
    At Cpl you own the remediation cycle on the findings your team generates. The ACAS scan's CAT I findings with your segment listed are your POA&M to write and track. Know the STIG checklists for the devices your team deploys — Cisco IOS switches, Windows workstations, the firewall platform the unit uses — well enough to read an ACAS finding and identify the remediation step without looking it up.
  • DoDD 8500.01 — Cybersecurity
    The Cpl who understands the Authorizing Official framework — why the ISSM has authority over the network segment, why an exception to policy requires command-level signature, what the risk acceptance process looks like — is the Cpl who can explain to a junior tech why a verbal workaround is not a valid remediation. Read the policy, understand the accountability chain, and enforce it.
  • MCO 1610.7 — Performance Evaluation System
    You write proficiency and conduct marks now. Read the policy chapter on how marks are computed and what narrative input means for the FitRep. Your junior techs' composite scores are built on their marks — and the mark you write reflects your ability to observe and assess performance honestly. The section chief who sees a Cpl's pro/con marks that are all the same number every month knows the Cpl is not observing his Marines.
  • MCO 1400.32 — Marine Corps Promotion Manual
    The composite score and cutting score framework for 0631 to Sgt. Read the composite score inputs chapter so you understand what feeds the score — PFT/CFT, rifle qual, MCMAP, awards, education, pro/con marks, PME. Then pull the current MARADMIN or TFRS data for the 0631 cutting score. The Cpl who tracks his own composite score monthly is the Cpl who closes the gap before it becomes a conversation with the section chief about why he is still waiting for the Sgt board.

Standards — How to Hit Each

  • Corporals Course graduate — required and gated; the Sgt board does not wait for your schedule.
    Corporals Course is delivered at regional NCO academies — Camp Lejeune, Camp Pendleton, Camp Foster Okinawa — and via distance education through CDET. In-residence is the preferred format if the slot is available and the deployment calendar allows. Do not wait for the section chief to nominate you — ask him what the timeline looks like at the 18-month mark and pull the slot 90 days out. The Cpl who shows up to the Sgt board without Corporals Course complete explains the gap to the board — and the board finds it remarkable.
  • Green Belt MCMAP minimum; Brown Belt is what the section chief notes on the FitRep going to the Sgt board.
    Build the Brown Belt timeline early — it takes more mat hours and a more senior instructor signature than Green Belt. Start the progression at the Cpl pin date. Schedule the mat sessions with the section's senior MCMAP instructor on a fixed weekly day so it does not slip when the training calendar fills. The composite score impact of MCMAP belt progression is real under MCO 1400.32; the FitRep narrative impact of 'Brown Belt' before the Sgt board is a visible differentiator.
  • 1st-Class PFT and CFT — your team runs the same hump schedule you do.
    As an NCO your PFT and CFT scores are visible to the platoon sergeant and the company gunny via the unit health-of-the-force report. A Cpl who misses 1st-Class is a Cpl who has a conversation with the section chief about personal fitness before he has the conversation about the Sgt board. Run with your team. Set the pace. The Cpl who hits 275+ PFT and maxes the CFT ammunition can lift is the Cpl the platoon sergeant has already mentioned to the company gunny.
  • Composite score tracked monthly in TFRS; pull the current cutting score for 0631 to Sgt before asking the section chief where you stand.
    Total Force Retention System (TFRS) is the Marine Corps online system for tracking composite scores and cutting scores. Log in monthly, pull your current composite, and compare it to the published cutting score for 0631 to Sgt. If you are below the cut, identify which inputs you can move — a new MCMAP belt, a college course, an award packet that has been sitting on the section chief's desk — and move them this quarter. The Cpl who is surprised by the cutting score at the reenlistment window was not checking his own math.
  • Zero open CAT I (Critical) STIG findings on any network segment your team owns through the full duty cycle.
    Zero open CAT I findings means you are remediating them on the same business-day cycle they appear on the scan, not the week they are due on the POA&M. The remediation rhythm for a Cpl-owned segment is: ACAS scan runs, findings land on your section chief's dashboard the next morning, you brief the CAT I list with remediation timeline before he asks. The section that consistently hits zero open CAT Is at inspection time is the section that remediated them between inspections — not the night before.

Technical Mistakes — Concrete Consequences

  • Deploying a switch with factory defaults because 'we'll harden it after the field op.'
    The ACAS scan runs the night you deploy. The ISSM reads the output the next morning and sends it to the S6 with the finding highlighted. Your section chief is now explaining to the S6 why a switch on the battalion's MCEN segment deployed with default credentials and no STIG baseline. The conversation happens in front of the S3 duty officer at 0900, and your name is mentioned. Deploy hardened or do not deploy.
  • Assigning the same IP address to two devices on the same segment.
    An IP conflict that knocks the battalion commander's workstation offline 30 minutes before the morning brief is the most memorable introduction a Cpl can make to the battalion S6. The conflict resolution takes less than two minutes once you identify it — but identifying it while the S6 is walking through the door and the S3 is on the phone takes longer. Check the address allocation before you assign it.
  • Leaving an unmanaged endpoint — a personal laptop, a personal device, an uncleaned government device — connected to the MCEN port.
    One unmanaged device with an unpatched vulnerability connected to the MCEN is a reportable cyber incident under MARFORCYBER reporting policy. The HBSS console shows the unmanaged endpoint within minutes of connection. The incident report that goes up from the ISSM names the network segment and the NCO responsible for it. The Cpl whose team has an unmanaged endpoint incident during a MEU workup has a different career trajectory after the report clears.
  • Approving a firewall rule change verbally without a written change request.
    The ISSM change-management process exists because an undocumented rule change that breaks connectivity has no rollback procedure and no audit trail. When the S6 asks 'what changed at 1600 yesterday that broke the command post NIPR?' and the answer is 'we made a verbal change but I don't remember the specifics' — that is the conversation that ends a Cpl's forward-command-post access.
  • Treating the NIPR/SIPR boundary verification as a 'we know it's right' assumption.
    The physical verification — separate cables, separate labels, separate switch stacks, confirmed by two people and documented on the installation checklist — happens before every field operation, not after. The Cpl who trusts the labels is the Cpl who creates a spillage incident. The Cpl who verifies both ends of every cable creates the documentation that exonerates his section when a boundary question arises during the IG inspection.

Career Decisions at This Rank

  • Pursue civilian IT certification (Security+, CCNA) or prioritize composite-score inputs for the Sgt board?
    The honest answer is: both, if you are managing your time correctly. Security+ is a DoD 8570.01-M baseline certification that some 0631 billets formally require, and the Marine Corps has tuition assistance and certification funding programs that cover the exam fee — ask the S6 and your section chief about the unit's program. CCNA adds direct value to the IOS skills you are executing daily. Both certifications add civilian market credibility that compounds with the Sgt rank and a clearance into a cleared IT contractor profile that starts at six figures. The Sgt board runs on composite score inputs — PFT, MCMAP, college credits, awards, pro/con marks — and a Security+ or CCNA adds college-credit equivalent points through some pathways (verify with the education center). The Cpl who earns both a competitive composite score and a civilian certification is not choosing between the board and the post-service market — he is building both simultaneously.
  • In-residence Sergeants Course versus CDET distance education?
    In-residence Sergeants Course at a regional NCO academy — Camp Lejeune, Camp Pendleton, Camp Foster Okinawa — is materially better than CDET distance education for two reasons: the curriculum is more rigorous under live instruction with external evaluators, and the network of Cpls from across the Corps you build during the in-residence course becomes a peer network that pays dividends at the SSgt and GySgt tiers. CDET is the valid fallback when the deployment calendar makes in-residence impossible. Do not choose CDET because it is more convenient. Choose it only when in-residence is genuinely inaccessible. Pull the slot 90 days out.
  • Re-up at first contract or ETS with Cpl rank and civilian IT credentials?
    The 0631 post-service market is genuinely strong for a Cpl with a clean record, an active clearance, and a Security+ certification — cleared IT contractor roles in the DC metro, Tidewater, and San Diego markets start at $60K-$80K for junior cleared technicians and scale quickly with experience. The reenlistment math at Cpl: the SRB for 0631 varies by year (pull the current MARADMIN), the Sgt board is a genuine possibility for a high-composite Cpl within 18-24 months of reenlistment, and the long-term 0631 career arc — Sgt section chief, SSgt platoon sergeant, GySgt network chief — leads to a post-service cleared contractor or GS civilian role with a significantly deeper operational resume than a Cpl ETS. The Marine who reenlists because he wants to make Sgt and genuinely values the 0631 craft has a clear path. The Marine who reenlists because he does not know what to do next is making the decision for the wrong reason.
  • Volunteer for MEU communications element versus stay in the garrison-cycle battalion?
    The MEU assignment as a junior NCO compresses your operational learning curve in ways that garrison cycles cannot replicate. You stand up LANs in spaces designed for ships, operate on the MEU S6's network plan with a joint-maritime command element, and run operations in a compressed timeline with less margin for error than a garrison exercise. The MEU communications element Cpl who deploys afloat comes back with a different operational credibility than the Cpl who spent the same period on a garrison training calendar. The cost: six to seven months unaccompanied, restricted communication with family, and the physical demands of shipboard life. If the section chief mentions your name for the MEU slate, say yes.

How the Seat Varies by Unit Type

  • Communications company, infantry regiment or division (standard billet)
    The most common Cpl 0631 billet — network section NCO in the communications company attached to a regiment or in the regimental communications element. Garrison-heavy cycle with predictable ITX and field exercise rotations. The T&R calendar is structured enough that task evaluations happen on schedule and CARP sign-offs track with the unit training plan. You own a team of two to four junior techs, the battalion-level LAN, and the HBSS/ACAS compliance posture for your segment. The section chief is a Sgt or SSgt who is close enough to supervise but delegating the team-level technical ownership to you.
  • MEU communications element, BLT (afloat cycle)
    The MEU communications Cpl operates under the MEU S6's network architecture on amphibious shipping. The technical environment is different — shipboard network infrastructure, space constraints, the ship's IT systems operating in parallel with the BLT's tactical LAN — and the operational tempo is compressed relative to garrison cycles. MEU communications Cpls are evaluated more frequently because the MEU S6 is watching network uptime metrics daily. The post-MEU Cpl returns with a different operational credibility and a Sgt board recommendation that reads differently than a garrison-only record.
  • Supporting establishment (MCAS, MCLB, MCRD communications division)
    Supporting establishment billets — at an air station, logistics base, or recruit depot communications division — offer a different technical environment. The network is larger and more stable than a tactical unit's LAN, the user base is more diverse, and the operational pace is steadier. A Cpl at a supporting establishment learns enterprise-scale network management at a lower operational tempo, which has genuine technical value, but may feel removed from the operational credibility that a tactical unit provides. The section chief's FitRep narrative for a supporting-establishment Cpl looks different to the SSgt board than a MEU or ITX-veteran Cpl's narrative.

What Good Looks Like at This Rank

The good Cpl 0631 is the network NCO the section chief sends to stand up the battalion forward command post LAN with two junior techs and trusts to come back with a completed network diagram, zero open CAT I findings on the ACAS scan, and all VoIP phones registered before the first staff brief — without a follow-up call during the stand-up. He ran the brief with his team before they left the motor pool. The two junior techs executed the plan the Cpl briefed, not the plan they improvised when the cabling ran short. His junior techs are building skills because he evaluates them on tasks rather than coaching them through tasks. The section chief can check any of the Cpl's junior techs on an IOS command-line task and get an execution that matches the NAVMC 3500.44 individual task standard — not a performance that requires the Cpl to translate. The CARPs are signed when the task is executed to standard, not signed when the Marine is in the right training block on the schedule. The Sgt board is not an afterthought. He pulls his TFRS composite score monthly. He has a 1st-Class PFT, a Brown Belt, and a college course through Tuition Assistance in the composite score input list. His section chief has already started the Sergeants Course nomination because the Cpl mentioned the timeline six months ago — not because he reminded him last week. The company gunny knows his name because the platoon sergeant mentioned it at the last NCO call. That kind of name recognition at the Cpl tier is the result of consistent, documented, verifiable technical work — nothing else.

Preview — The Next Rank

Sgt is the Network Section Chief rank — the section chief the S6 calls when the battalion commander's VTC fails and he needs a restoration time before the next meeting. The jump from Cpl to Sgt is not primarily a technical jump. You already have the technical foundation. The jump is from team leader to section chief — from owning your team's output to owning the section's output across five to fifteen Marines and multiple teams. At Sgt you write FitReps on your Cpls under MCO 1610.7. Not pro/con marks — full FitRep Section A narrative input that the reporting senior (typically the communications officer or platoon commander) builds attribute rationale from. The Sgt who writes a Section A in 200 specific observed-behavior sentences is the Sgt the reporting senior calls at the end of the rating period to ask about specific Cpls. The Sgt who writes 400 generic words gets the platoon sergeant's editorial correction. The HBSS console at the Sgt tier is the section's console — not the team's segment. The compliance percentage and CAT I open-findings count you brief to the ISSM weekly represents the full section inventory. The Sgt who misses a non-compliant endpoint on his section's dashboard because he delegated without a back-brief is the Sgt who explains the finding to the S6 without a verification record. Build the reporting habit at Cpl so that it is automatic at Sgt.
FAQ

0631 E4 — Frequently Asked Questions

Q01What does a E4 0631 (Network Administrator) actually do?
You supervise two to four junior network techs and own the LAN from the IDF to the user's desk — VLAN design, switch configuration, firewall rules, VoIP provisioning, and the trouble-ticket queue that the section chief reviews every Monday.
Q02What's the most important thing to know as a E4 0631?
You are the network NCO the section chief stops babysitting.
Q03What does a typical day look like for a E4 0631?
Time-blocked day at the E4 0631 rank tier: 0500 Wake. Phone check — any alerts from the HBSS console overnight? Any junior Marine in the section group chat with an issue? None? PT uniform on, 0530 PT formation. You take accountability for your team — your two to four junior techs — and report to the section chief (Sgt) or platoon sergeant (SSgt). Missing Marine is your problem, not theirs, 0545-0700 Unit PT. The section runs the same schedule as the communications company. You pace the front of your team's formation on run days. On ruck days you are carrying your share.…
Q04What mistakes get E4 0631 soldiers fired or relieved?
An undocumented firewall rule change that breaks connectivity at the battalion command post. The change-management process — written request, ISSM-reviewed, documented rollback — exists because 'I knew what I was doing' is not a rollback procedure. The Cpl who makes undocumented changes is the Cpl who explains the outage to the S6 without a paper trail to support him; NJP for conduct off-duty.…
Q05What career decisions matter most at the E4 0631 rank tier?
Pursue civilian IT certification (Security+, CCNA) or prioritize composite-score inputs for the Sgt board? — The honest answer is: both, if you are managing your time correctly. Security+ is a DoD 8570.01-M baseline certification that some 0631 billets formally require, and the Marine Corps has tuition assistance and certification funding programs that cover the exam fee — ask the S6 and your section chief about the unit's program. CCNA adds direct value to the IOS skills you are executing daily.…
Q06What's next after E4 for a 0631 (Network Administrator) in the Marines?
Sgt is the Network Section Chief rank — the section chief the S6 calls when the battalion commander's VTC fails and he needs a restoration time before the next meeting.
Q07What manuals and regulations does a E4 0631 need to know cold?
NAVMC 3500.44 — Communications T&R Manual (collective and individual tasks for network section NCOs; you run training against this and sign your team's CARPs).; DISA STIGs — you own the remediation cycle on the findings your team generates; the ACAS report lands on your section chief's desk with your name on the open findings.; DoDD 8500.01 — Cybersecurity; the ISSM cites this when the S6 asks why an exception to policy requires command-level signature.

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Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards