Thomas J. Pfeifer serves as Executive Vice President and President of the National Security Sector at Booz Allen Hamilton Holding Corp, where he directs the firm’s strategic engagements with U.S. defense, intelligence, and homeland security clients. In this capacity, he oversees a multi-billion-dollar portfolio of consulting, analytics, and digital transformation services that support mission-critical operations across the national security enterprise. Pfeifer brings more than three decades of experience in the defense and intelligence communities, having previously served in senior leadership roles at the Department of Defense and major aerospace and defense contractors. His career highlights include directing large-scale intelligence integration programs, advancing cybersecurity architectures for classified networks, and leading cross-agency initiatives that improved real-time situational awareness for operational commanders. Under his guidance, Booz Allen’s National Security Sector has expanded its capabilities in artificial intelligence, cloud migration, and data-driven decision support, strengthening partnerships with key agencies while delivering measurable improvements in mission outcomes and operational resilience.