# NASA Goddard Seeks HBG II Contractors

NASA released the final solicitation on October 21, 2026, for the five-year, **$425 million** Hydrosphere, Biosphere & Geophysics Support Services II (HBG II) recompete at Goddard Space Flight Center in Greenbelt, Maryland. The small-business hybrid IDIQ will support Earth science research and related computing, including data product development and validation, instrument development, and numerical modeling. Proposals are due **December 4, 2026, at 2 p.m. Eastern (43 days remaining)**; NASA expects to make an award in April 2027, with the contract expected to take effect in June 2027.

- Small-business bidders should review the final RFP on SAM.gov and assess eligibility under NAICS 541715, which has a stated size standard of 1,000 employees.
- The IDIQ may use both cost-plus-fixed-fee and firm-fixed-price task orders, so prospective bidders should account for both contract types in their technical and pricing strategies.
- Questions are due to Contracting Officer Cassandra Moore within 14 calendar days of the October 21 release—November 4, 2026. The recompete replaces incumbent HBG support work held by Science Systems and Applications, Inc.

**Jurisdictions:** federal
**Industries:** Information Technology
**Topics:** Contracting Vehicles
**Published:** October 22, 2026

### Government Entities
- National Aeronautics and Space Administration (NASA)
- Goddard Space Flight Center (GSFC)

### Vendors
- Science Systems and Applications, Inc. (SSAI) (Incumbent for HBG scientific research support)

### Sources
- [NASA launches $425M hydrosphere research support recompete - Washington Technology](https://www.washingtontechnology.com/contracts/2026/10/nasa-launches-425m-hydrosphere-research-support-recompete/416730) - Washington Technology
- [NASA Seeks Contractors for Goddard HBG Support Services II](https://www.govconwire.com/articles/nasa-final-rfp-hbg-support-services-ii-goddard) - GovCon Wire