Top GSA engineering services contractors
In the 12 months ending Oct 5, 2026, the General Services Administration obligated $196.7M in net prime contract dollars under NAICS 541330, down 77.0% from $857.0M in the preceding 12 months. 59 prime contractors received positive obligations, and 10 of them accounted for 80% of that spend.
Prime contracts funded by the General Services Administration. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top GSA contractors for NAICS 541330
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | Honeywell International, Inc | $64.0M | $57.7M | 31.6% | ▲ 3 |
| 2 | Honeywell Building Solutions SES Corp | $19.6M | $19.0M | 9.7% | ▲ 4 |
| 3 | Apsi Construction Management | $14.6M | $1.2M | 7.2% | ▲ 20 |
| 4 | Jacobs Engineering Group Inc. | $14.3M | $6.4M | 7.1% | ▲ 6 |
| 5 | Trane U.S. Inc. | $14.2M | $9.8M | 7.0% | ▲ 3 |
| 6 | Johnson Controls Government Systems, LLC | $11.3M | $25.4M | 5.6% | ▼ 1 |
| 7 | CEG Solutions LLC | $9.8M | $157.2M | 4.9% | ▼ 5 |
| 8 | AECOM Technical Services, Inc. | $7.4M | $16.6M | 3.7% | ▼ 1 |
| 9 | Concurrent Technologies Corp | $5.7M | $0 | 2.8% | New |
| 10 | AFG Group Inc. | $5.5M | $3.5M | 2.7% | ▲ 5 |
| 11 | Siemens Government Technologies Inc | $4.0M | $5.2M | 2.0% | ▲ 1 |
| 12 | Noresco, LLC | $3.2M | $3.1M | 1.6% | ▲ 5 |
| 13 | ABM Industries Inc | $2.9M | $3.8M | 1.5% | ▲ 1 |
| 14 | Genco Systems Inc | $2.4M | $309K | 1.2% | ▲ 21 |
| 15 | Johnson, Mirmiran & Thompson, Inc. | $2.2M | $5.3M | 1.1% | ▼ 4 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Apsi Construction Management$1.2M → $14.6M (+$13.4M) · now #3
- Jacobs Engineering Group Inc.$6.4M → $14.3M (+$7.8M) · now #4
- Honeywell International, Inc$57.7M → $64.0M (+$6.3M) · now #1
Largest declines
- Ameresco Inc$389.3M → $545K (−$388.8M) · now #30
- CEG Solutions LLC$157.2M → $9.8M (−$147.4M) · now #7
- Constellation Newenergy Inc$119.8M → $0 (−$119.8M) · no latest-period obligations
New to this market
4 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Concurrent Technologies Corp | Jun 17, 2026 | $5.7M |
| Jacobs Project Management Co | Jul 7, 2026 | $329K |
| WC Engineering, PSC | Sep 18, 2026 | $305K |
| Scdatacom, LLC | Sep 3, 2026 | $60K |
Where the money comes from
Funding sub-agencies within the General Services Administration, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| Public Buildings Service | $190.4M | $855.5M | Down $665.2M (77.7%) |
| Federal Acquisition Service | $5.8M | $720K | Up $5.1M (705.4%) |
| Office of Mission Assurance | $545K | $521K | Up $24K (4.6%) |
| General Services Administration | $8K | $270K | Down $262K (97.1%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| 47PE0318F0001 | Amentum Technology, Inc. CONSTRUCTION MANAGEMENT SERVICES OF NEW UNITED STATED FEDERAL COURTHOUSE, ANNEX BUILDING | $5.6M | Nov 30, 2026 |
| 47PF0024F0107 | Trane U.S. Inc. ENERGY SAVINGS PERFORMANCE CONTRACT HART DOLE INOUYE FEDERAL CENTER, BATTLE CREEK, MI THIS MOD IS TO CLOSE OUT THE NON-INTERFACE AWARD IN THE CONTRACT WRITING SYSTEM.… | $6.3M | Dec 31, 2026 |
| 47PM0721F0053 | Honeywell Building Solutions SES Corp NEW CONTRACT NUMBER FOR FINANCIAL SYSTEMS PURPOSES ONLY. ORIGINAL CONTRACT TERMS AND CONDITIONS REMAIN UNCHANGED. | $33.9M | Dec 31, 2026 |
| 47PF0022F1073 | AECOM Technical Services, Inc. PROJECT MANAGEMENT AND TECHNICAL SUPPORT SERVICES, U.S. GENERAL SERVICES ADMINISTRATION, VARIOUS LOCATIONS REGION 5. | $4.6M | Feb 11, 2027 |
| 47PA0026F0004 | AFG Group Inc. AFG GROUP PROJECT MANAGEMENT SUPPORT NATIONAL COVERAGE | $4.4M | Mar 31, 2027 |
| 47PB0020F0068 | AECOM Technical Services, Inc. CONSTRUCTION MANAGEMENT SERVICES FOR A NEW FEDERAL FACILITY, JOHN A. VOLPE NATIONAL TRANSPORTATION SYSTEMS CENTER, 55 BROADWAY, KENDALL SQUARE, CAMBRIDGE, MA 02142 | $7.7M | Mar 31, 2027 |
| 47PG0223F0081 | Alpha Construction and Engineering Corporation 21351 RIDGETOP CIR STE 200, DULLES, VA. NEW CONTRACT FOR CMA SERVICES FOR PRECONSTRUCTION/ PROCUREMENT, CONSTRUCTION, & PROJECT CLOSE OUT PHASES. FUNDING SOURCES WILL BE BA55 &… | $7.9M | Apr 5, 2027 |
| 47QFHA23F0010 | Concurrent Technologies Corp PURPOSE OF THE ORDER IS TO PROVIDE SAFETY AND OCCUPATIONAL HEALTH, MANAGEMENT, ANALYTIC AND TECHNICAL SUPPORT SERVICES FOR THE OFFICE OF THE UNDERSECRETARY OF DEFENSE FOR… | $5.7M | Jun 28, 2027 |
| 47PH5426F0214 | AECOM Technical Services, Inc. BAT & BER ASSESSMENTS | $3.8M | Sep 24, 2027 |
| 47PM0922F0038 | Brown Construction Services, Inc PROJECT MANAGEMENT SUPPORT SERVICES FOR OFFICE OF DESIGN AND CONSTRUCTION SMALL PROJECT DIVSION. OCTOBER 1, 2022 THRU SEPTEMBER 30, 2023 | $8.6M | Sep 30, 2027 |
Common questions
Who are the top GSA contractors for NAICS 541330?
In the latest 12 months, Honeywell International, Inc ($64.0M), Honeywell Building Solutions SES Corp ($19.6M), Apsi Construction Management ($14.6M) received the most GSA obligations for engineering services.
How concentrated is this market?
The eight largest primes held 76.7% of positive obligations, and Honeywell International, Inc alone held 31.6%. 4 contractors won their first obligations in this market during the latest 12 months.
Are any large GSA NAICS 541330 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is 47PE0318F0001 (Amentum Technology, Inc., $5.6M obligated), ending Nov 30, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
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$286.4MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
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