# HDTRA121C0042 Sole Source Cost Extension

Canonical: https://abierto.us/opportunities/hdtra121c0042p00037

- Solicitation number: HDTRA121C0042P00037
- Notice type: Justification
- Status: Awarded to Arservices, Limited
- Department: Department of Defense
- Agency: Defense Threat Reduction Agency
- Contracting office: Defense Threat Reduction Agency (HDTRA1)
- Product or service code: R408 Program Management/Support Services
- Place of performance: Fort Belvoir, Virginia
- County: Fairfax County (FIPS 51059). https://abierto.us/counties/fairfax-county-va-51059
- City: Fort Belvoir. https://abierto.us/cities/fort-belvoir-va-5129008
- First posted: February 2, 2026
- Last posted: February 2, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/c4a5d13538d043b792703dd59ef86d27/view

## Description

Justification for Other than Full and Open Competition. The Defense Threat Reduction Agency (DTRA) contracting activity proposes to procure, without using full and open competition, a continuing effort entitled “Research & Development Directorate Advisory and Assistance Service Support” via a contract modification to the current Research & Development Advisory and Assistance Services contract with ARServices, Limited (ARServices).

## Award on USAspending

- Recipient: Arservices, Limited (UEI LXQRK5BR85F1)
- Contract: HDTRA121C0042, definitive contract
- Obligated: $75,783,394.42, current value $167,754,465
- Competition: Full and Open Competition After Exclusion of Sources, 6 offers received
- Link: award number HDTRA121C0042 equals the contract number; same awarding office HDTRA1 (high confidence)
- Record: https://www.usaspending.gov/award/CONT_AWD_HDTRA121C0042_9700_-NONE-_-NONE-/


## Publications

- February 2, 2026: Justification. Notice c4a5d13538d043b792703dd59ef86d27. https://sam.gov/workspace/contract/opp/c4a5d13538d043b792703dd59ef86d27/view

## Points of contact

- Mary Kay Chase, mary.k.chase2.civ@mail.mil

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Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/hdtra121c0042p00037.