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USMC2651

Intelligence Surveillance Reconnaissance (ISR) Systems Engineer

Administers and maintains intelligence community information systems and networks. Manages classified computing environments supporting SIGINT and other intelligence operations.

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Recruiter vs. Reality
What they tell you

“You'll administer the classified intelligence networks that Marine SIGINT and special intelligence operations run on — managing servers, systems, and infrastructure that nobody outside the community knows exists. The TS/SCI clearance combined with hands-on classified systems administration puts you in one of the highest-demand categories for defense contractors and IC agencies. When a cleared sysadmin job posts, the hiring manager is thinking about you.”

What it's actually like

It's classified IT work, which means every frustration of regular sysadmin life is multiplied by the bureaucratic overhead of operating in a classified environment. STIG compliance, CAC authentication, STIGs that haven't been updated since the Obama administration — these are your daily companions. You will fix the printer. You will run cable through spaces that were not designed for cable. You will be the helpdesk for people who have clearances but cannot figure out their CAC PIN. The work that isn't that is genuinely interesting and matters. The clearance is worth real money on the outside; cleared cloud engineers and cyber professionals with IC-environment experience are a specific and well-compensated market segment. Get AWS or Azure certifications before you separate — the clearance plus cloud certs is a combination that defense contractors will move quickly on.

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MOS Intel

ClearanceTS/SCI
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PromotionFast
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Deploy TempoLow
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BonusUp to $20,000
Career Intel
Duty StationsCamp Pendleton (CA) · Camp Lejeune (NC) · Fort Meade (MD) · Quantico (VA) · Various intelligence sites
Daily LifeAdministering classified intelligence networks, managing Special Intelligence (SI) systems, maintaining servers and workstations, and ensuring network security on TS/SCI systems. You are the IT backbone for Marine Corps intelligence operations. The work requires security clearances, attention to detail, and systems administration skills.
AIT / SchoolTraining at Corry Station (Pensacola, FL) and follow-on schools cover classified network administration, security protocols, and intelligence system management. The training pipeline is several months and includes both intelligence fundamentals and IT systems administration.
Physical DemandsLow. This is a desk-based systems administration role. You maintain Marine Corps physical standards but the job itself is in server rooms and operations centers.
DeploymentsPrimarily garrison-based at fixed intelligence facilities; some deployments with radio battalions and intelligence units
Certifications
TS/SCI clearance (maintained)CompTIA Security+CISSP (encouraged)Network administration certifications
Pro Tips
  1. 1This MOS combines IT skills with a TS/SCI clearance — the two most marketable things on a civilian resume. Leverage both aggressively.
  2. 2Get every IT certification you can: Security+, CISSP, CCNA, AWS certifications. The clearance gets you in the door; the certs determine your salary.
  3. 3Network administration on classified systems is a niche that defense contractors pay $100,000-$150,000+ for. Start building those relationships while in.
The Honest Truth

The 2651 is arguably the single most marketable enlisted MOS in the Marine Corps for post-military earning potential. You combine a TS/SCI clearance with hands-on IT systems administration experience on classified networks — a combination that defense contractors, intelligence agencies, and cybersecurity firms will pay six figures for on day one after separation. The recruiter has no idea this MOS exists. The work itself is straightforward sysadmin: keeping classified networks running, managing accounts, patching systems, and troubleshooting. It's not glamorous but it's stable, and the career ceiling is enormous. The only catch: you're still a Marine, so expect PT, field exercises, and the occasional reminder that your primary MOS is "Marine rifleman." Stack certifications, maintain your clearance, and you will never struggle to find work.

Training Pipeline
1
Recruit Training13w
Parris Island (SC)
2
MCT4w
Camp Geiger (NC)
3
Systems Administrator Course20w
Twentynine Palms (CA) or Camp Lejeune (NC)
Networks, Active Directory, server admin. Security+ qualification included.
On the Outside

What this actually is in the real world

Your skills translate. Here's what civilian employers call this job — and what they pay.

Systems Administrator

Dead-on match
$90,000$62,000 – $138,000/yr median
Job market: Average

Network Administrator

Dead-on match
$90,000$62,000 – $138,000/yr median
Job market: Average

Cybersecurity Analyst

Strong match
$112,000$78,000 – $165,000/yr median
Job market: Strong growth
Salary data estimated from BLS Occupational Employment and Wage Statistics and comparable civilian roles. Figures are approximations — use as a guide, not a guarantee.
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