As of July 2022, 25% of people employed in Washington, D.C., were employed by the federal government. Many of the region's residents are employed by companies and organizations that do work for the federal government, seek to influence federal policy, or are otherwise related to its work, including law firms, defense contractors, civilian contractors, nonprofit organizations, lobbying firms, trade unions, industry trade groups, and professional associations, many of which have their headquarters in or near the city for proximity to the federal government.