Reagan grew up in Hobbs, New Mexico, and has long been fascinated with the exploration of the sea and space. As a child he saw one of the early moonwalks on television and knew that he wanted to be part of space exploration some day.
Reagan has a B.S. degree in aerospace engineering from Texas A&M University, where he graduated Summa Cum Laude in 1989. He received an M.S. degree in aerospace engineering sciences, on a NASA Fellowship, at the University of Colorado in 1993.
Reagan was responsible for the crew and flight controller training for the second ISS assembly mission (the 100th shuttle flight), was in charge of training the 4th Expedition Crew to the ISS, and led the training for the 8th ISS crew. He has been extensively involved in negotiations and development of training with the Russian Space Agency in support of the ISS, as well as the Japanese and European Space Agencies. He is proficient in the Russian language.
The other primary part of Reagan's job has been his position as Deputy Project Manager for the NASA Undersea Research Team "NEEMO" (NASA Extreme Environment Mission Operations), conducted in the Aquarius underwater laboratory near Key Largo, Florida. He has supported NEEMO missions, including NEEMO 3, 4 and 5, from the surface as part of the core "Surface Support Team", serving as mission lead for NEEMO 4. Reagan has said that he "self-selected" for the NEEMO project by volunteering at an early stage to help put it together. Reagan trained as a backup for the first NEEMO mission, NEEMO 1, in October 2001, and was one of the aquanauts on the NEEMO 2 mission in May 2002. Prior to NEEMO 2, Reagan wrote: "I am excited about the opportunity to be a part of this 2nd NEEMO mission - this is such a rare and unique opportunity. To work and live in the sea for nine days will be the fulfillment of a dream for me." During NEEMO 2, Reagan commented in his Mission Day 2 journal entry: "At noon today ... we officially became aquanauts. Not 'certified trained as aquanauts,' not 'wannabe aquanauts,' but real aquanauts. Welcome to a pretty exclusive club. In case you were wondering, there is no door prize, but the job benefits are outstanding. Technically, the term aquanaut is limited to those who stay underwater for 24 hours or more."
Reagan has subsequently supported multiple NEEMO missions, and served as Mission Director for NEEMO 6, NEEMO 9, NEEMO 10, NEEMO 11, NEEMO 12 and NEEMO 13.
Reagan is a certified PADI diver with Enriched Air, Advanced, and Rescue Diver certifications. He is also an instrument rated pilot with complex, tailwheel and aerobatic endorsements.
Reagan's hobbies include soccer, water and snow skiing, scuba diving, and music. He plays the keyboard and sings in a rock 'n roll band made up of colleagues called the "Rockit Scientists". Reagan has lived in League City, Texas and Houston, Texas. He has a son named Kyle.