91C vs IT
Utilities Equipment Repairer (USA) vs Information Systems Technician (USN)
The Army digs a hole and sleeps in it. The Navy floats above the problem entirely. Both think the other one is the idiot.
The 91C experience, unfiltered: the work spans commercial refrigeration, heating systems, air conditioning, and plumbing — a breadth of utility systems knowledge that most civilian tradespeople specialize away from rather than toward. Union membership through UA (plumbers) or SMART (sheet metal and HVAC) credits military service toward apprenticeship. The IT experience, equally unfiltered: shipboard systems include ADNS (Advanced Digital Network System) and SCI networks that require clearance to touch and patience to maintain. NMCI — the Navy Marine Corps Intranet — is the enterprise network you will support ashore, and it is a massive IT infrastructure managed by HP/DXC on contract, which means you will learn to navigate both Navy bureaucracy and contractor bureaucracy simultaneously. Same military. Different realities. Neither was in the brochure. A recruiter once described both of these as "high-speed." The definition of speed was not specified.
After the Uniform
The part the recruiter skips: what each job actually translates to once you're a civilian — and what it pays.
Salary data from the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics program. A guide, not a guarantee.
Recruiter vs. Reality
The pitch versus what people who actually did the job report back.
“You'll maintain generators, HVAC systems, air compressors, and the utility equipment that every unit depends on for power and climate control. HVAC technicians are in shortage nationwide and the trade pays extremely well: residential HVAC technicians start at $55K, commercial HVAC mechanics average $70-80K in most markets. EPA 608 certification (required for refrigerant handling) is achievable while you're in. The HVAC workforce is aging and the industry needs people — your military training is a genuine on-ramp to a career with strong compensation and consistent demand.”
You fix things that are broken in ways that make buildings uninhabitable: HVAC systems, boilers, refrigeration units, plumbing, water treatment equipment, and the interconnected utilities infrastructure that makes an Army installation function as something other than a collection of expensive buildings. The work spans commercial refrigeration, heating systems, air conditioning, and plumbing — a breadth of utility systems knowledge that most civilian tradespeople specialize away from rather than toward. Army HVAC systems are often older than the soldiers working on them, which means your troubleshooting experience covers equipment that doesn't have YouTube repair videos and TMs that assume a level of systems knowledge you're building as you go. The civilian trade pathways are direct: HVAC technician is one of the most consistently in-demand skilled trades in the country. Union membership through UA (plumbers) or SMART (sheet metal and HVAC) credits military service toward apprenticeship. EPA 608 refrigerant certification is achievable during service and required for civilian HVAC work. The pay for journeyman HVAC mechanics in most markets is genuinely good. The work is never automated. The phone will always ring when someone's heat goes out.
“You'll manage Navy network infrastructure and information systems — routers, switches, servers, and the communication architecture that connects ships and shore installations to each other and to the broader naval network. The shipboard IT environment is hard on equipment and harder on the people maintaining it under operational pressure, which means IT veterans who've managed Navy networks have a problem-solving resilience that enterprise IT employers recognize. Security clearance plus CompTIA Security+ and Network+ plus operational Navy IT experience is a competitive federal IT contractor profile. Government IT organizations and managed services providers recruit Navy IT veterans consistently and the clearance is a meaningful differentiator in the federal market.”
You are the person who resets passwords for people who swear they didn't change anything, aboard a ship where going home after work is not an option because the ship is the home. The Navy's IT infrastructure ranges from modern and well-maintained at major shore installations to 'this router is from when this ship was commissioned and we can't update the firmware because the one critical application only works on the old firmware,' and you will experience both in the same career. NMCI — the Navy Marine Corps Intranet — is the enterprise network you will support ashore, and it is a massive IT infrastructure managed by HP/DXC on contract, which means you will learn to navigate both Navy bureaucracy and contractor bureaucracy simultaneously. Shipboard systems include ADNS (Advanced Digital Network System) and SCI networks that require clearance to touch and patience to maintain. CompTIA Security+ is mandatory. CCNA is common. The Help Desk tickets will range from 'my CAC reader isn't working' (it's upside down) to 'the entire ship's network is down and the XO is asking why.' The six-figure civilian IT job is real. The Security+ is real. So is earning it.
The Real Life
Same dimensions, side by side. 91C on the left, IT on the right.
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Network administration, server maintenance, SATCOM operations, and help desk support. On a ship: you are the IT department for 300-5,000 people, working in a server room that might be 100°F. Shore duty: more structured, 8-hour days, and the chance to work on larger enterprise networks.
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A School at Corry Station (Pensacola, FL) is about 24 weeks. Covers networking, system administration, SATCOM, and cybersecurity fundamentals. The pace is manageable and Pensacola is a pleasant training location.
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Low. IT work is desk-based. Shipboard life involves navigating ladders and tight spaces, but the job itself is sedentary.
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Navy IT is a solid, reliable path to a civilian tech career. The recruiter will tell you it's like being an IT professional — and it largely is, just on ships and submarines sometimes. What they won't emphasize: sea duty is the deal-breaker for many. You will spend 3-4 years on a ship, and IT on a ship means being on call 24/7 when systems go down. The server room is hot, the equipment can be outdated, and you are responsible for everything from email to satellite communications. Shore duty is much more like a normal IT job. The civilian translation is strong — Security+ and military IT experience get you hired — but you have to supplement with modern certifications because the Navy still runs a lot of legacy systems.
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