Jeffrey got his Bachelor of Arts degree, draduating from King University in 1969. In 1986 he attained Doctor of Letters degree at the same university.
Jeffrey Ethell was ordained in the Baptist church in 1970 and for several years worked as the director of Troubled Youth Ministry of Virginia’s Richmond Youth Challenge, Inc. In 1976 Ethell turned his talents to writing about planes. The following year Ethell became a commercial pilot.
Jeffrey lectured at the Institute for Defense Analysis, several Pentagon offices, the Center for Naval Analysis, the Close Air Support Study Group, Lockheed Martin Aircraft, Marine Amphibious Warfare School, Technology Service Corporation, National Air & Space Museum, Smithsonian Institution and military bases across the country. Also, since 1993 he taught graduate-level courses on the history of military aviation at American Military University.
Ethell also served as a historical consultant for a number of organizations and people, including artist Keith Ferris, who assigned him the task of researching his mural in the National Air & Space Museum, Smithsonian Institution.
During his lifetime, Jeffrey appeared on national television each year in prime time documentaries, dealing with military aviation. In addition, he served as a screen correspondent for ABC's Wonderful World of Flying, video series, flying a series of warbirds with cameras aboard.
Jeffrey Ethell was a member of Eighth Air Force Historical Society, Experimental Aircraft Association, Warbirds of America, Commemorative Air Force, Mid-Atlantic Air Museum and National Warplane Museum.
Jeffrey married Bettie Need on December 19, 1968. The couple had three children – Jennifer, David and Julie and fourteen grandchildren.