Crosby is a retired submarine officer with over 25 years experience serving aboard nuclear submarines for the US Navy. He is the only person to rise from serving as a cook in the US Navy to being qualified to command US submarines in the history of US Naval service. He currently works for the government in the environmental management industry as a senior leader. He is a motivational speaker and has authored two books: Only in America: My Journey from Hot Coffee to Scrambled Eggs to Nuclear Submarines and Inspiring Innovation: Examining Operational, Policy, and Technical contributions of Vice Admiral Samuel L. Gravely and his successorsof African American Admirals.
Crosby currently serves as a member of the Board of Trustees for the Bolles School in Jacksonville, Florida. As a strong advocate for underserved youth,Crosby founded a nonprofit called B.O.O.S.T. to empower youth to use a positive attitude and strong work ethic to succeed in life.