- SAM.gov
- System for Award Management — the official U.S. government database for vendor registration, certifications, and contract award data. Free registration required.
- SBA
- Small Business Administration — the federal agency that certifies small businesses and administers set-aside programs (8(a), WOSB, HUBZone).
- SDVOSB
- Service-Disabled Veteran-Owned Small Business — SBA certification providing set-aside access for businesses 51%+ owned by service-disabled veterans.
- SEMA
- State Emergency Management Agency — each state's agency for disaster preparedness and response. Issues contracts independent of FEMA.
- SEWP
- Solutions for Enterprise-Wide Procurement — NASA-managed GWAC for IT products and services. One of the highest-volume contract vehicles.
- SOO
- Statement of Objectives — high-level goals document; contractor proposes the approach. More flexible than SOW or PWS.
- SOW
- Statement of Work — describes specific tasks the contractor must perform, often prescribing how as well as what.
- Subcontracting
- Performing work as a lower-tier contractor under a prime contractor. Excellent way to build past performance for new market entrants.