Troy GuyTroy is a convert to Catholicism after being a Baptist for over 25 years. Troy and his wife have four children and live in Texas. He entered the Catholic Church at the Easter Vigil in 2017 along with six of his family members. His book, Evangelical Catholic, describes his experience discovering the Catholic faith and presents the indisputable Biblical and historical evidence that led him to convert.

Professionally, Troy manages an engineering laboratory for the design and development of commercial space systems. He has served as lead engineer on the Sierra Nevada Corporation Dream Chaser lifting-body spacecraft. He was a principal engineer on the Gravity Recovery and Interior Laboratory Spacecraft and the ORION spacecraft while at Lockheed Martin Space Systems.

Troy began his professional career in nuclear science, performing high energy-density experiments for physics-based weapon and fundamental research programs at the Los Alamos National Laboratory. He holds degrees in Electrical Engineering, Nuclear Engineering, and Physics from the University of Houston and Texas A&M University. In addition, he is an FAA certified commercial pilot and flight instructor of multi-engine airplanes.