John S. Mengucci
John S. Mengucci is the president and chief executive officer (CEO) of CACI International Inc. (NYSE: CACI), a Fortune 500™ technology-first national security company. Under his leadership, CACI has grown into a $9.6 billion company with 27,000 talented employees who expand the limits of national security by delivering advanced technologies that help customers move faster, operate more efficiently, and anticipate and defeat evolving threats. While driving sustained operational and financial excellence, Mengucci has positioned CACI as a trusted partner delivering mission-critical capabilities to address the nation's most complex national security challenges.
Mengucci joined CACI as chief operating officer (COO) of U.S. Operations in February 2012 and served as president of U.S. Operations from July 2012 to June 2017, and CACI’s COO from June 2017 to June 2019. Prior to joining the company, Mengucci served in several executive roles at Lockheed Martin over a 27-year career, rising to the level of president.
Mengucci received the 2025 Executive of the Year award from the Northern Virginia Chamber and the Professional Services Council; the 2025 Public Company Executive of the Year award from the Association of Corporate Growth (ACG) National Capital; and the Boy Scouts of America National Capital Area Council’s 2024 Technology Good Scout Award. He has appeared on both the Executive Mosaic Wash100 list and Virginia Business Magazine’s 500 Power List every year since 2020; he was named one of WashingtonExec’s Top 25 Execs to Watch in 2020 and 2019; and he was featured on the FCW Fed 100 list in 2018.
Mengucci serves on the executive committees of both the Northern Virginia Technology Council and the Professional Services Council. He is an active member of the board of governors for the Aerospace Industries Association (AIA) and vice chair of Clarkson University’s Board of Trustees. From June 2021 to June 2025, he served on the board of the Spookstock Foundation, a non-profit organization that supports the families of fallen and severely wounded CIA and U.S. Special Operations personnel, often referred to as “shadow warriors.”
Mengucci holds a bachelor’s degree in computer science from Clarkson University and an MBA from Syracuse University.