On a large installation the commissary and the exchange sit a few hundred yards apart. A cashier in one is a civil service employee paid from appropriations. A cashier in the other is a nonappropriated-fund employee whom federal law deems not an employee for most OPM-administered purposes. Two stores, two retirement systems, two workers’ compensation statutes: DCPAS puts NAF staff under the Longshore Act, not FECA, and in one of six separate pension plans. A separating servicemember assumes “a job on base” has one answer. It has three.

What are the three employment systems on a military base?

Short answer: Civil service, nonappropriated-fund employment, and contractor employment. Different statutes, different money, different doors.

The appropriated-fund path is what people mean by “federal job.” It sits in the competitive service, defined at 5 U.S.C. 2102 as all executive branch civil service positions except those excepted by statute, Senate-confirmed positions and the SES. Your grade is a GS number, or WG for trade and craft work.

NAF produces the strangest sentence in the area. Under 5 U.S.C. 2105(c) an employee paid from nonappropriated funds of the exchanges “is deemed not an employee” for laws administered by OPM, with narrow exceptions. The same subsection says this does not affect those activities’ status as federal instrumentalities. You work for the federal government and simultaneously do not. Per DCPAS these are the exchanges and MWR programs, paid from the revenue they generate, across six DoD NAF employers including AAFES, NEXCOM and CNIC.

The third system is contractor employment, governed for cleared work by 32 CFR Part 117. Your employer is a company holding a facility clearance, an administrative determination that it is eligible for classified access at a stated level. You can sit at a government desk and badge through a government gate without being a federal employee. Deeper: contract jobs vs. federal jobs.

How many people work under each system?

Short answer: No single number exists. Three figures, three vintages, three counting methods, and none isolates people who physically work on an installation.

GAO report 26-108100 puts DoD civilian employees at 714,780 on January 1, 2026, down from 793,155 a year earlier: a fall of 9.9 percent. GAO’s own note specifies appropriated-fund civilians. Every exchange cashier and every contractor sits outside that count.

The NAF number is the weakest figure here. DCPAS puts the DoD-wide NAF workforce at 102,171, led by Navy at 38,234 and AAFES at 21,246. The DMDC extract behind it is dated June 2024, two years old and still the most recent public DoD-wide count. It lumps Regular and Flexible employees together, overstating full-time jobs, and omits Coast Guard NAF, which sits under DHS.

The contractor figure needs the heaviest caveat. CRS In Focus IF10600, updated February 6, 2026, reads DoD’s FY2024 Inventory of Contracted Services as about 400,620 prime and subprime contractor full-time equivalents across four service portfolios, roughly 47 percent Army. Read “equivalents” literally: CRS says the reports estimate FTEs for direct labor from contracted hours and “do not include a total number of individual contractors.” The inventory reaches only service purchases above $3 million, so much base work never enters it. The data is self-reported, and classified FTEs at components such as DIA are excluded.

No published figure exists for how many contractor employees physically work on an installation rather than in a company facility; 400,620 is not it.

Which of these jobs actually needs a security clearance?

Short answer: The position decides, not the employer. The rule expressly recognizes national-security-sensitive positions that require no classified access at all.

Most applicants reason backwards, assuming contractor equals cleared and NAF equals not cleared, then get surprised both ways, the same misreading that separates jobs that genuinely require a Secret clearance from those that only advertise one. 5 CFR 1400.101(b) requires all positions to be evaluated for sensitivity “including but not limited to eligibility for access to classified information.” Noncritical-Sensitive covers Secret, Confidential and “L.” Critical-Sensitive covers Top Secret and “Q.” Special-Sensitive covers SCI.

Read 1400.201(a)(1)(ii) and (a)(2)(ii) and one clause appears twice: positions “not requiring eligibility for access to classified information” that still carry potential for serious or exceptionally grave national security damage. The regulation’s examples include safeguarding arms and explosives. An armorer can hold a national security position with no classified access.

A second system runs alongside. Under 5 CFR 731.106 agency heads designate every covered position high, moderate or low risk, and high or moderate risk positions would normally be Public Trust. That rule is changing: a final rule published June 30, 2026, effective July 30, replaces the five-year public trust reinvestigation with continuous vetting. It turns on character and conduct, expressly distinct from national security eligibility under E.O. 10450 and E.O. 12968. Trusted Workforce 2.0 confirms the split: the DNI owns the national security sensitive workforce, the OPM Director everything else. If your base job is public trust rather than cleared, public trust positions and their tiers has the mechanics.

One honest limit: the DoD issuances governing base access and CAC issuance are not publicly retrievable, so this article names no investigation tier for base access.

Contractor rules are tighter. 32 CFR 117.10(a)(1) permits classified access only at or below the level of the company’s own entity eligibility determination, and only where the employee holds a valid need-to-know, a favorable government eligibility determination, and a signed non-disclosure agreement. Two clauses matter: companies must limit requests to the minimum needed and may not “establish a cache of cleared employees,” nor request one for a non-employee. You cannot buy your own clearance. See jobs that sponsor a security clearance and our NISPOM explainer for 2026.

How long does the vetting take?

Short answer: Government-wide, FY2026 Q2 averaged 85 days end to end at the Moderate tier and 148 at the High tier, against goals of 40 and 75.

The Trusted Workforce 2.0 quarterly progress report tracks both tiers by quarter. Moderate ran 109 days end to end in FY2025 Q4, then 92, then 85. High ran 220, then 205, then 148. Both sit above target. The report labels tiers by risk, not classification. 32 CFR 117.10(b)(1) makes the mapping defensible: moderate covers Secret, high covers Top Secret and SCI. It stays a mapping, and ODNI’s reporting runs a quarter behind.

The investigation stage produced most of that gain. DCSA closed FY2026 Q2 holding 100,696 cases and processed the fastest 90 percent of Secret-level investigations in 44 days, Top Secret in 57, the quickest in over a decade. Read those against the end-to-end figures carefully: they cover one stage, on a fastest-90-percent basis, and the PAC is moving to a 100-percent-of-cases standard that “will decrease reported timeliness.” Rejection rates improved from 3.9 to 3.4 percent against a 1 percent target, but each rejected case still costs an average of 12.5 days. See how interim clearances work and whether your clearance expires.

What does each system pay?

Short answer: Only one publishes a table you can check before applying. GS pay is public to the step. NAF and contractor pay are not.

The 2026 General Schedule carries a 1.0 percent across-the-board increase, effective January 11, 2026. The executive order held locality percentages at their 2025 levels. Assume locality moved too and you will overestimate the change at your installation. The base table is not what anyone is paid: every GS employee receives locality on top, and the floor is 17.06 percent. A GS number without a named locality means little.

Same title, grade and step; the only variable is locality. Blue-collar work differs: under 5 U.S.C. 5341 the Federal Wage System fixes rates in line with prevailing levels within a local wage area, which is why two identical WG jobs pay differently. NAF trade and craft employees join that system under 5 U.S.C. 5342(a)(2)(B).

NAF white-collar pay is the honest gap. No government-wide NAF pay table exists, so no NAF salary figure or NF band range appears here. Pay, benefits, classification and leave are set by DoD and its component employers rather than by OPM, per 5 U.S.C. 2105(c). A NAF applicant cannot research the going rate in advance. Contractor pay has the same problem. Wrap rate covers that arithmetic; what a clearance is worth covers the premium.

Where does each system post its openings?

Short answer: Three channels, almost no overlap. Appropriated-fund vacancies go through USAJOBS, NAF openings through each component’s own site, contractor roles through company pages and cleared boards.

Worth stating plainly, since we run a cleared job board and have every incentive not to: for two of the three systems, a cleared board is the wrong tool. Competitive-service vacancies go through USAJOBS, and a cleared board neither surfaces them nor helps with the occupational questionnaire or veterans’ preference. Exchange, MWR and child development positions post on the components’ own systems and rarely reach us, because most are not cleared roles. A cleared board earns its place on contractor work with a clearance requirement: one system of three, and only its cleared slice.

What if you are a military spouse or a separating servicemember?

Short answer: Two side doors: noncompetitive spouse appointment under 5 CFR 315.612, and the DoD/OPM Interchange Agreement for NAF employees. Neither skips the background investigation.

The spouse authority covers spouses of active-duty members, spouses of 100 percent disabled members injured on active duty, and un-remarried widows or widowers of members killed on active duty. It tightens soon. For appointments on or after January 1, 2029, the member must hold PCS orders, the marriage must predate them, and the spouse must be relocating, with appointment limited to the new duty station’s area. The authority moves you past the competitive queue, not past vetting. 5 CFR 731.106(c)(1) is blunt: such appointees “must undergo a background investigation.”

The NAF-to-GS route is the one nobody mentions. The Portability of Benefits for NAF Employees Act of 1990 authorized an OPM/DoD interchange agreement, in indefinite use since December 13, 1993. It lets DoD NAF employees move noncompetitively into competitive service jobs at any agency. The same statute drives the three-day rule: break service by no more than three days and your pay and benefits travel with you. Take two weeks and they do not.

Two asymmetries to price in. NAF service is generally not creditable for civil service benefits, and OPM’s reduction-in-force procedures do not apply to NAF employees. On the appropriated-fund side, the two-year DoD probationary period is gone: 10 U.S.C. 1599e was repealed effective December 31, 2022 for anyone appointed on or after that date. What replaced it cuts the other way. Since Executive Order 14284 and OPM’s June 2025 rule rescinding 5 CFR 315 subpart H, finishing probation no longer makes you tenured by default; the agency must certify that finalizing your appointment advances the public interest.

Underneath it all sits 10 U.S.C. 129a, which directs the Secretary of Defense to set “the most appropriate and cost efficient mix” of military, civilian and contractor personnel. Every installation job is an output of that calculation, and it gets rerun. Do not read the 9.9 percent contraction as work relocating to the NAF and contractor columns. GAO attributes the drop to roughly 53,200 deferred resignations and 59,500 fewer hires during a 2025 hiring freeze, and found DoD has no plan to assess lessons learned, so where the work went is undocumented. If you separate in 2026, stop asking which system is best and read three fields on each announcement: sensitivity designation, locality area, funding source.

Frequently Asked Questions

Do all jobs on a military base require a security clearance?

No. The requirement attaches to the position, not the base or the employer. Under 5 CFR 1400.101(b) every federal position is evaluated for sensitivity, and many come back with none. Others land in the public trust track under 5 CFR 731.106, a suitability determination rather than a clearance.

Can I get a security clearance on my own before applying?

No. 32 CFR 117.10(a)(7) bars contractors from submitting eligibility requests for anyone who is not their own employee or consultant, and 117.10(a)(5) bars using requests to “establish a cache of cleared employees.” A clearance follows a sponsored, contract-justified need.

Is NAF employment federal employment?

It depends which law is asking. 5 U.S.C. 2105(c) deems NAF employees not employees for laws administered by OPM, while preserving the activities’ status as federal instrumentalities. In practice: a different retirement system, a different workers’ compensation statute, no FEHBP.

Can NAF experience get me into a GS job?

Yes, through the DoD/OPM Interchange Agreement, in indefinite use since December 13, 1993. It permits noncompetitive appointment of DoD NAF employees into competitive service positions at any agency, subject to three conditions: non-time-limited positions on both ends, one year of continuous service, and no break in service.

Which of the three pays the most?

Only one will tell you before you apply. GS pay is published to the step and locality: on OPM’s 2026 tables a GS-12 step 1 is $89,508 at a Rest-of-U.S. installation and $102,415 near Washington. NAF pay is set by each component with no government-wide table; contractor pay is bounded by the contract.