Arm Group LLC
Hummelstown, PA Part of Arm Group, Inc.
- UEI
- L9DUJ8SWDFM5
- CAGE
- 9TMH5
- Primary NAICS
- 541330 Engineering Services
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
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- 541330 Engineering Services Primary
- 541360 Geophysical Surveying and Mapping Services
- 541380 Testing Laboratories and Services
- 541620 Environmental Consulting Services
- 541690 Other Scientific and Technical Consulting Services
- 562910 Remediation Services
- 562998 All Other Miscellaneous Waste Management Services
- Corporate family
-
-
Arm Group, Inc.
Parent
D7EKZJJDRKH6
-
Arm Group LLC
L9DUJ8SWDFM5
- Arm Enertech Associates LLC QER8QJ89UFG8
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Arm Group LLC
L9DUJ8SWDFM5
-
Arm Group, Inc.
Parent
D7EKZJJDRKH6
- SAM.gov registration date
- Physical address
- 1129 W Governor Rd, Hummelstown, PA 17036, USA
- Website
- armgroup.net
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
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- 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 .
About Arm Group LLC
Arm Group LLC operates exclusively as a federal subcontractor, delivering geophysical engineering, geotechnical investigations, and nuclear propulsion support services to the Department of the Army, the Department of Energy, the Environmental Protection Agency, and the Army Corps of Engineers through primes including Stantec Consulting Services Inc., Fluor Marine Propulsion LLC, and General Dynamics OTS. The vendor is a for-profit Subchapter S corporation headquartered in Hummelstown, Pennsylvania, and serves as a subsidiary of Arm Group, Inc., a parent organization that also owns Arm Enertech Associates LLC.
Arm Group LLC operates in a narrow and specialized capability space anchored in geophysical services. Recent sub-award work includes geophysical borehole logging and deviation surveys for the Keystone Dam Stilling Basin in Oklahoma (Stantec prime, October 2025); geophysical logging and structural analysis of optical and acoustical core logs for Guajataca Dam in Puerto Rico (Stantec, December 2024); geotechnical and geophysical mapping and surveying at Fort Campbell, Kentucky (Stantec, June 2024); and nuclear laboratory and naval nuclear propulsion program support under Fluor Marine Propulsion (January 2026). Additional work includes borings for testing and capacity expansion in munitions production (General Dynamics OTS, August 2024) and geophysics support on a Superfund site remediation project (EA Engineering, Science, and Technology, Inc., October 2022). The vendor's award portfolio reflects engineering services and R&D roles that are distributed across Army Corps of Engineers water-infrastructure programs, Army ammunition production, Department of Energy nuclear programs, and EPA environmental remediation.
The vendor's recent footprint is small and non-concentrated. Six total sub-awards over the past four years (two in 2024, one each in 2022, 2025, and 2026) carry a combined obligated value of $633 thousand, distributed across six distinct customer agencies with no single agency anchoring the awards. Arm Group LLC places work under four Army Corps of Engineers indefinite-delivery contracts (two sub-orders under W9123720D0010) and the EPA Remedial Acquisition Framework for Design and Engineering Services. The vendor's sub-award strategy routes work through established engineering primes — Stantec accounts for three of the six awards — rather than pursuing prime positions. There is no indication of SBA set-aside certifications, vehicle seats, or prime-contract eligibility in the source. The parent Arm Group, Inc. maintains the same federal posture, with all observed activity routed through subcontractor roles under Army Corps of Engineers and Department of Defense primes.
Quick answers
What is Arm Group LLC's UEI?
Arm Group LLC's Unique Entity ID (UEI) in SAM.gov is L9DUJ8SWDFM5.
What is Arm Group LLC's CAGE code?
Arm Group LLC's CAGE code is 9TMH5.
What is Arm Group LLC's primary NAICS code?
Arm Group LLC's primary NAICS code is 541330 (Engineering Services).
Where is Arm Group LLC located?
Arm Group LLC's physical address in SAM.gov is 1129 W Governor Rd, Hummelstown, PA 17036, USA.
Is Arm Group LLC registered in SAM.gov?
Yes. Arm Group LLC's SAM.gov registration is active through March 17, 2027.
Who is Arm Group LLC's parent company?
Arm Group LLC is part of Arm Group, Inc.
On GovTribe
See Arm Group LLC's full federal record
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
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