You need to do three things:
You should segment the Federal market and target a few agencies that you believe you can help. Thoroughly research the mission, procurement plans, organizational structure, issues, and identify key players and small business specialists at their contracting offices.
Then, market to these contracting offices and program offices. If they need your product/service and feel you are the best company then they can use your schedule to make the buy. But, you've got to convince them first that they need to do business with you.