0121 vs 0671

You will fix other people's pay problems while your own pay is somehow also wrong. Service record books have errors dating back to before you were born and it will become your personal mission to correct them all. Every Marine in your unit will treat your desk like an emergency room, showing up two days before the deadline for an action that needed a week. The HR and personnel administration skills are genuinely transferable — payroll processing, benefits administration, and records management are civilian jobs that exist everywhere. SHRM certification after separation gives your military personnel experience civilian structure that hiring managers recognize.

The 0651 split into 0631 and 0671 was overdue — the old MOS was trying to make one Marine a network engineer AND a systems administrator AND a help desk tech. Now 31s own the network infrastructure (switches, routers, tactical data links) and you own everything else: servers, workstations, Active Directory, Exchange, imaging, patching, backups, virtualization, and whatever enterprise service the Corps decides to bolt on this fiscal year. Your daily life is sysadmin work — building out server racks in a server room on garrison, or running a COC's entire IT infrastructure out of a tent in the field with generators and tactical satellite. You will learn more from breaking things and fixing them under pressure than from any course. The training pipeline at MCCESS is decent but moves fast — if you don't have some IT aptitude going in, you'll be drinking from a firehose. Security+ is mandatory for your job (DoD 8570 baseline cert), and your command will usually send you. The civilian translation is strong — every company needs sysadmins, and cleared ones with Secret or TS/SCI are in constant demand. The frustrating part: you're responsible for everything working, but you rarely get credit when it does. When the Colonel's email is down, you are the most important person in the building. When it's working, you're invisible. Welcome to IT.