John L. Hall
After working at sea as a civilian oceanographer on board a seismic survey vessel, he was commissioned through Navy Officer Candidate School in 1983, and assigned as a surface warfare officer to USS John L. Hall (FFG 32) in Mayport, Florida. During his Navy career White served as Destroyer Group commander, then as superintendent of the US Naval Observatory. He was a commander in the Naval Meteorology and Oceanography Command. In 2012 he was elevated to Rear Admiral rank, and was designated as the Oceanographer and Navigator of the US Navy, and Director of the Navy Task Force assigned to address climate change.