# SOLICITATION NUMBER 391634 “SOFTWARE ENGINEERING SUPPORT SERVICES”

Canonical: https://abierto.us/opportunities/solicitationnumber391634

- Solicitation number: SOLICITATION_NUMBER_391634
- Notice type: Sources sought
- Status: Open. Offers due September 23, 2026 at 7:00 PM EDT
- Department: Department of Energy
- Contracting office: Hanford Tank Waste Operations & Closure LLC - DOE Contractor (899091)
- NAICS: 541511 Custom Computer Programming Services
- Set-aside: Total small business set-aside
- Place of performance: Richland, Washington
- First posted: August 26, 2026
- Last posted: September 15, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/3c2b0952105b4a8ca8d4e03568aaa375/view

## Description

Hanford Tank Waste Operations & Closure, LLC (H2C) requests proposals for Software Engineering Support Services. The requested work is in support of H2C’s Prime Contract 89303324DEM000096 with the U.S. Department of Energy, Office of River Protection.

## Attachments

- [Current Request for Proposal](https://www.hanford.gov/tocpmm/page.cfm/CurrentRequestsforProposal)

## Publications

- August 26, 2026: Sources sought, due September 9, 2026 at 7:00 PM EDT. Notice 1cc7779b1fd14a8abef70762b83e2bbe. https://sam.gov/workspace/contract/opp/1cc7779b1fd14a8abef70762b83e2bbe/view
- September 2, 2026: Sources sought, due September 16, 2026 at 7:00 PM EDT. Notice 63da69a5e62140b5bda2f00e2a69bbeb. https://sam.gov/workspace/contract/opp/63da69a5e62140b5bda2f00e2a69bbeb/view
- September 15, 2026: Sources sought, due September 23, 2026 at 7:00 PM EDT. Notice 3c2b0952105b4a8ca8d4e03568aaa375. https://sam.gov/workspace/contract/opp/3c2b0952105b4a8ca8d4e03568aaa375/view

## Points of contact

- Stephanie Mendoza, stephanie_e_mendoza@rl.gov, 5093762523

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/solicitationnumber391634.