[2][3] Buck is a native of Indianapolis where he attended North Central High School, graduating in 1979.

As a flag officer, Buck has served as commander, Patrol and Reconnaissance Force with U.S. 5th and 7th Fleets, Fleet Air Forward, Patrol and Reconnaissance Group; chief of staff, Strategy, Plans and Policy (J5), the Joint Staff; Director, 21st Century Sailor Office, where his portfolio included the Navy's programs on sexual assault prevention and response, suicide prevention, alcohol abuse, and other destructive behaviors; and most recently he served as commander, U.S.

Buck's shore and staff assignments include Air Test and Evaluation Squadron (VX) 1; Bureau of Naval Personnel; Joint Staff J3; Office of the Chief of Naval Operations staff as executive assistant to the deputy chief of Naval Operations (CNO) for Warfare Requirements and Programs (N6/N7); and as the deputy director for operations in the Strategy and Policy Directorate (J5), U.S. Joint Forces Command.

Prior to major command, Buck completed an interim assignment with the National Reconnaissance Office; he is a member of the Navy's Space Cadre.

Buck also completed a special assignment as a senior fellow on the CNO's Strategic Studies Group in Newport, Rhode Island, an innovation think tank for the Navy.