16. CACI

2016 Rank: 17

Top Executive: Kenneth Asbury, President & CEO

Location: Arlington, Va.

www.caci.com

CACI acquired the government services group of L-3 Communications Holdings for $550 million to strengthen its intelligence services business and expand its pipelines throughout the national security space. Ken Asbury, CEO of the $3.7 billion company, said President Donald Trump's push for more border protection, national security spending, and regulatory and corporate tax relief will bolster some of CACI's leading practices.