Office of Small Disadvantaged Business Utilization (OSDBU). Click on their list of members, for contact details of OSDBU offices for many different federal agencies
Dept. of Defense Office of Small Business Programs. Committed to maximizing the contributions of small businesses in DoD acquisitions
Dynamic Small Business Search (DSBS). Agencies use this SBA site to look for small businesses under a specific NAICS code. Prime contractors use this site to find appropriate sub-contractors.
FedBizOpps (FBO). All federal agencies post opportunities over $25,000 to this site, as well as Market Research requests, event information and more.
Federal Acquisition Jumpstation. A central point for access to procurement agencies, documents, acquisition forecasts, assistance, and federal acquisition regulations.
Federal Procurement Data System (FPDS) Searchable data all federal contracts over $3,000,
Procurement Technical Assistance Centers (PTACs) Free or low-cost help for businesses seeking to compete in federal, state and local government contracting.
SBA Small Business Development Centers (SBDCs) Help for small businesses, with offices across the country.
SBA Sub-Net Where prime contractors post sub-contracting opportunities for small businesses.
USA Spending – Searchable database of federal contracts, grants and loans over $25,000, with some data on certain federal contracts over $3,000.