A GS-15 civilian employee’s equivalent military rank is O-6: Colonel in the Army, Air Force, Marine Corps, and Space Force, or Captain in the Navy and Coast Guard. The Department of Defense and the VA both use this mapping for identification, protocol, and career-transition purposes.1VA Careers. Where Do You Fit in the General Schedule (GS)?2Department of Defense. DoDI 1000.01 – Identification Cards Required by the Geneva Conventions Civilian and military roles never line up perfectly, but O-6 is the officially recognized match.
What GS-15 Is
The General Schedule is a 15-grade pay structure covering roughly 1.5 million federal white-collar employees.3U.S. Office of Personnel Management. General Schedule Overview GS-15 sits at the top of that ladder, and the grade is set by federal statute along with the 10 pay steps within each grade.4Office of the Law Revision Counsel. 5 USC 5332 – The General Schedule
A GS-15 typically directs a major program, leads a division, or serves as a top technical authority within an agency. Reaching the grade almost always requires a graduate degree, deep subject-matter expertise, and years of progressively responsible experience. Above GS-15 is the Senior Executive Service, a separate system for the government’s most senior career leaders.
Where the O-6 Equivalency Comes From
The VA’s official translation table maps the upper GS grades to officer ranks in a clean sequence: O-4 (Major or Lieutenant Commander) to GS-13, O-5 (Lieutenant Colonel or Commander) to GS-14, and O-6 (Colonel or Captain) to GS-15.1VA Careers. Where Do You Fit in the General Schedule (GS)? DoD Instruction 1000.01 confirms this, placing GS-15 in the same category as O-6 for Geneva Convention identification purposes, with the same table used for precedence, housing entitlements, and other administrative matters across the department.2Department of Defense. DoDI 1000.01 – Identification Cards Required by the Geneva Conventions
The O-6 rank looks different depending on the branch:
- Army, Air Force, Marine Corps, and Space Force: Colonel (COL or Col)
- Navy and Coast Guard: Captain (CAPT)5U.S. Department of War. U.S. Military Rank Insignia
A Colonel typically commands a brigade or regiment of several thousand service members, leads a major staff directorate, or runs a significant installation-level program. A Navy Captain may command a large warship, a shore installation, or a fleet staff section. Those responsibilities track closely with how GS-15 civilians function as division chiefs, senior program managers, or principal advisors to agency leadership.
When a GS-15 works alongside military officers on a joint staff or at a combatant command, the equivalency carries real weight in meetings, travel, and housing assignments, even though civilians don’t wear insignia or exchange salutes.
Why Some Charts Say O-5
Older comparison charts occasionally list GS-15 as spanning O-5 to O-6. A Lieutenant Colonel and a GS-15 can have overlapping responsibilities on a joint staff, and their pay ranges do overlap at points. But the official DoD and VA mappings are unambiguous: O-5 aligns with GS-14, and O-6 aligns with GS-15.1VA Careers. Where Do You Fit in the General Schedule (GS)? If a chart tells you a GS-15 equals a Lieutenant Colonel, it’s a grade low.
Pay: How the Two Compare
Base pay charts favor the civilian side at first glance, but the picture narrows once tax-free military allowances are factored in.
GS-15 in 2026
The 2026 GS-15 base salary runs from $126,384 at Step 1 to $164,301 at Step 10.6Office of Personnel Management. Salary Table 2026-GS Almost no GS-15 earns the base rate because locality pay applies in most areas. In the Washington-Baltimore-Arlington locality, the 2026 adjustment is 33.94%, pushing GS-15 Step 1 to $169,279.7Office of Personnel Management. Salary Table 2026-DCB GS pay is capped at Level IV of the Executive Schedule, which is $197,200 in 2026.8Federal Register. January 2026 Pay Schedules In the DC locality, the cap hits at Step 6, so Steps 6 through 10 all pay the same $197,200. Outside the highest-cost localities, the cap is less likely to bind, and a Step 10 in a moderate-cost area might land around $175,000 to $185,000.
Colonel Pay
A dollar-for-dollar comparison is trickier on the military side. An O-6’s base pay depends heavily on years of service, and total compensation includes Basic Allowance for Housing and Basic Allowance for Subsistence, both tax-free. BAH alone can exceed $3,000 per month in high-cost areas, and because it isn’t taxed, its effective value runs higher than the face number. A senior O-6 with 20-plus years of service often has total compensation comparable to or exceeding a GS-15 in a high-locality area.
The practical implication for anyone weighing a military-to-civilian transition: looking at base pay alone will make the GS-15 salary appear more generous than the actual switch turns out to be.
Retirement Runs on Different Rules
The retirement systems differ enough to change what “equivalent” means over a career.
Most GS-15 employees retire under the Federal Employees Retirement System. The FERS pension multiplies your “high-3” average salary by 1% for each year of service, or 1.1% if you retire at 62 or later with at least 20 years of service.9U.S. Office of Personnel Management. Computation A GS-15 retiring at 62 with 30 years of service would receive roughly 33% of their high-3 as an annual pension. FERS also includes Social Security and the Thrift Savings Plan with agency matching up to 5%.
Service members under the Blended Retirement System receive 2% of their high-36 base pay for each year served, along with government TSP matching.10Department of Defense. BRS Defined Benefit Factsheet Retire at 20 years and you draw 40% of your high-36. The older legacy system paid 2.5% per year (50% at 20 years) but is closed to anyone who entered after 2017.
The biggest practical difference isn’t the multiplier, it’s the age. A Colonel who commissioned at 22 and retires at 20 years is 42 and already collecting a pension. A GS-15 typically can’t draw an unreduced FERS annuity until their late 50s or early 60s. That head start on pension income is one of the largest financial gaps between the two paths.
If You’re Transitioning From the Military
For officers moving into federal civilian work, the equivalency is a starting point for the job search. A retiring O-6 should generally target GS-15 positions, an O-5 should look at GS-14, and so on down the table.1VA Careers. Where Do You Fit in the General Schedule (GS)? The grade you actually qualify for depends on the specific position’s requirements, not your former rank alone. Veterans’ preference and special hiring authorities can also affect how you compete for a given announcement.11U.S. Office of Personnel Management. Veterans and Transitioning Service Members