Reppert graduated from the Academy with honors in 1999, earning a bachelor of science degree in political science, and was commissioned a second lieutenant in the Marine Corps. He went on to graduate from the Naval Postgraduate School in Monterey, Calif., in 2004, earning his M.B.A in finance and was a Conrad Scholar. From 2000-03, Reppert was stationed at Marine Corps Air Station Miramar as a finance officer. He was promoted to Captain in 2004 and began working in the Programs and Resources Department at Headquarters Marine Corps as a Congressional Liaison. After serving nine years in the Marine Corps and achieving the rank of Captain, Reppert left the corps to begin his coaching career.
Along the way, Reppert has held high school assistant coaching jobs at St. Albans (D.C.), Episcopal (Va.), Gonzaga (D.C.), Robert Louis Stevenson (Calif.) and Poway (Calif.). He has also served as the manager of Champions Field House in Rockville, Md., and as founder and partner in Breakout Lacrosse Company, based in Washington, D.C.
Reppert, who resides in Alexandria, Va. with his wife, Jill, earned his first college coaching job in 2009 at Harvard where he served under former Navy assistant coach and current Maryland head coach John Tillman. While at Harvard, his responsibilities included developing and maintaining the team's budget, serving as director of operations, managing Crimson Lacrosse Camps and assisting in the development of the team's offense.
"I'm excited about the addition of J.L," said Sowell. "He's someone I have great respect for in terms of his passion, knowledge and his ability to get the most out of his players. His experience as a former midshipman and Captain in the Marine Corps will be a valuable asset to the team, as well. Additionally, he comes highly recommended by coaches I have a great deal of respect for in John Tillman and Jeff Shirk, and I look forward to working with him."
"I am thankful to Coach Sowell for providing the opportunity for me to return to the Naval Academy," said Reppert. "I am excited to contribute to the Academy's mission as one of the many facets in the development of America's future leaders. I look forward to working with Coach Sowell and Coach Wellner to build upon the tradition of the past and lead Navy lacrosse into an exciting future as one of the top programs in the country."