Enercon LTD
Evanston, IL Doing business as Grumman / Butkus Associates
- UEI
- T2ZZXFJ31UX1
- CAGE
- 6E9M4
- Primary NAICS
- 541330 Engineering Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
- SAM.gov registration date
- Physical address
- 820 Davis St Suite 300, Evanston, IL 60201, USA
- Website
- grummanbutkus.com
- Founded
- 1973
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
-
- Industrials
- Capital Goods
- Construction & Engineering
- Civil Engineering
- SIC code
- 87 Engineering & Management Services
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $255,082 |
| FY2025 | $508,785 |
| FY2024 | $1,805,131 |
| FY2023 | $952,207 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Homeland Security | $126,063 | |
| 2 | General Services Administration | $117,766 | |
| 3 | Social Security Administration | $11,253 |
Contract vehicles
No active vehicles.
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
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|---|---|---|
| KOO LLC | Chicago, IL | 541310 Architectural Services |
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| Bailey Edward A / E / C | Chicago, IL | 541310 Architectural Services |
| SFA Architects, Inc. | Cincinnati, OH | 541310 Architectural Services |
| Griskelis Young Harrell, LTD. | Chicago, IL | 541310 Architectural Services |
About the company
Enercon LTD, doing business as Grumman / Butkus Associates, is a self-certified small disadvantaged business headquartered in Evanston, Illinois that delivers architectural and engineering design services for federal facility modernization, infrastructure upgrades, and building systems studies as a prime contractor (100% of recent awards) under GSA regional IDIQ vehicles.
The firm's capability portfolio centers on mechanical, electrical, and plumbing (MEP) systems design, HVAC test and balance, energy consulting, and sustainable design solutions for federal buildings. Representative recent work includes a $390,406 delivery order from GSA Region 5 for domestic water pipes replacement design at the Anthony J. Celebrezze Federal Building in Cleveland, Ohio; a $231,930 order for HVAC system retro-commissioning design at the P.V. McNamara Federal Building in Detroit, Michigan; a $284,865 order for high purity water system design at the FDA Forensic Chemistry Center in Cincinnati, Ohio; and a $227,601 order for interior lighting replacement design at the Stanley J. Roszkowski U.S. Courthouse in Rockford, Illinois. Work encompasses design services, post-construction contract services, management and inspection, record documentation, and pre-alteration assessments across the Great Lakes region (Illinois, Indiana, Michigan, Ohio, and Wisconsin).
Customer concentration is heavily skewed to GSA Public Buildings Service Region 5, which accounts for 71 awards and $82.5 million of the combined potential value across all 100 awards (98% coverage by dollar value). Secondary customers include the Social Security Administration (9 awards, $666 thousand), the FDA (1 award, $285 thousand), U.S. Customs and Border Protection (5 awards, $161 thousand), and U.S. Citizenship and Immigration Services (1 award, $126 thousand). The firm has worked with 14 distinct federal agencies overall.
Enercon LTD sits on two parent vehicles: the PBS Region 5 Architectural Engineering Services IDIQ (2016–2021) with 54 task orders carrying $3.8 million combined potential value, and the GSA Region 5 Supplemental Architect and Engineering Services IDIQ (2020–2025, $50 million ceiling) with 41 task orders carrying $3.7 million combined potential value. The firm's recent award activity peaked in 2023 (20 awards) but has slowed significantly — 3 awards in 2025 and 1 to date in 2026 — reflecting maturation of the earlier IDIQ (2016–2021) and a dip in new task order issuance under the current vehicle. Within the next twenty-four months, 11 awards with combined potential value of $1.8 million reach ultimate completion date, creating recompete exposure across multiple facility projects.
The firm competes on both set-aside and full-and-open vehicles, with Partial Small Business and Total Small Business designations appearing on approximately 30% of listed awards; the remainder carry no set-aside. Enercon holds no prime GWACs or government-wide blanket purchase agreements outside the regional GSA vehicles. NAICS activity concentrates on engineering services (56 awards) and architectural services (42 awards), with 94 awards falling under PSC code for Architect and Engineering–Construction: Office Buildings.
Quick answers
Is Enercon LTD registered in SAM.gov?
Yes. Enercon LTD's SAM.gov registration is active through September 17, 2027.
Which contract vehicles does Enercon LTD hold?
Enercon LTD holds a place on 2 federal contract vehicles, including GSA Region 5 Supplemental Architect and Engineering Services IDIQ 2020-2025 and PBS Region 5 Architectural Engineering Services 2016-2021.
How much has Enercon LTD received in federal contracts?
Federal contracts obligated $508,785 to Enercon LTD in fiscal year 2025 and $3,521,205 in fiscal years 2023 through 2027.
How does Enercon LTD rank among federal contractors?
Enercon LTD ranked #57 in PSC C1AA in FY2025.
What is Enercon LTD's most recent federal award?
Enercon LTD's most recent federal contract award is Uscis security upgrade design, FED bldg, 536 s clark ST, chicago, IL. Design services, post construction contract… (47PE5426F0058), from Public Buildings Service, on January 27, 2026.
On GovTribe
See Enercon LTD's full federal record
- Federal contract awards
- IDV awards
- Contract vehicles
- Funding analysis by agency, NAICS and set-aside
- Similar vendors