IN REMEMBRANCE | FALL/WINTER 2025 | 61 velopment technician for the Redevelopment Authority of Philadelphia. Jack Z. Harkavy ’61, Livingston, N.J., June 2, 2025. Harkavy was a member of The Brown and White and Pi Lambda Phi. He worked as an entrepreneur and owned several businesses. Thomas D. Selgas Sr. ’61, San Diego, Calif., June 12, 2025. A member of the lacrosse and cross-country teams, Selgas worked for Eastman Kodak. Matthew A. Taylor ’61 ’62, Wyckoff, N.J., May 31, 2025. A Delta Upsilon member, Taylor began his career with American Cyanamid and retired as president of Cyro Industries. Thomas W. Cowan ’62, Liverpool, N.Y., June 8, 2025. Cowan was a Delta Chi member. He made his career in the metals industry, retiring from New Process Gear. Ronald D. Johnson ’62, Randolph, N.J., May 24, 2025. Johnson was president of Delta Tau Delta and a member of the Lehigh Glee Club and baseball team. He worked as a metallurgical engineer and retired as president of Hoogovens Aluminum USA. He was an active volunteer with his class and for his dedication was honored with the Alumni Award in 1987. Robert H. Letzing ’62, Madison, Wis., April 25, 2025. Letzing was a Sigma Alpha Mu member. Peter A. Rohrer ’62, State College, Pa., June 10, 2025. Rohrer retired as vice president of CIGNA in information technology. His sibling, Stephen Rohrer, was a member of the Class of 1959. Donald G. Young ’62, Cranford, N.J., April 10, 2025. Young was a member of the track and cross-country teams, as well as Alpha Tau Omega. He made his 35-year career with ExxonMobil. David E. Gledhill ’63, Sarasota, Fla., Aug. 18, 2025. Gledhill worked for the business group that made Glad bags, retiring from The Clorox Company as director of corporate engineering. He was a member of the Tower Society. Herman L. Whiteman ’63, Bonita Springs, Fla., June 9, 2025. A member of Delta Phi, Whiteman made his career with the U.S. Navy and retired as a lieutenant commander. After his military career, he worked as the IT director of Lancaster County, Pa. Daniel A. Huse ’64, Lansdowne, Va., April 11, 2025. Huse served in the U.S. Navy and made his career with IBM. Peter Issel ’64, Lewes, Del., May 19, 2025. A Phi Delta Theta member, Issel was a bank executive, commercial developer and operator of Issel Corp. His parent, W. Ernest Issel, was a member of the Class of 1934. Lucien H. Platt Jr. ’64, Canaan, Conn., Aug. 9, 2025. Russell T. Rigg ’64, Old Greenwich, Conn., May 16, Geoffrey Andrews ’15, mechanical engineer, aerospace educator, aviator and visiting lecturer in the P.C. Rossin College of Engineering and Applied Science, passed away in a plane crash on June 19, 2025, at the age of 30. A rising leader in the field of hypersonic aerodynamics, Andrews had recently returned to Lehigh to teach a graduate-level course as a visiting lecturer in the Department of Mechanical Engineering and Mechanics (MEM), playing a key role in the Lehigh Aerospace Initiative. He earned his bachelor’s degree in mechanical engineering from Lehigh in 2015 before completing his M.S. and Ph.D. in aeronautics and astronautics at Purdue University. Andrews brought tremendous energy and dedication to everything he pursued, whether working as a member of the technical staff within the Structural and Thermal Fluids Engineering Group at MIT Lincoln Laboratory, volunteering with the American Institute of Aeronautics and Astronautics (AIAA) or inspiring future engineers through K-12 STEM outreach. Prior to joining MIT Lincoln Laboratory, Andrews worked at NASA’s Glenn Research Center and the Von Karman Institute for Fluid Mechanics. His return to Lehigh as an instructor earlier this year fulfilled a personal goal to help students engage with the cutting edge of aerospace engineering. “Geoffrey was one of the most exceptional students I’ve had the pleasure of teaching, and it was a real joy to welcome him back to Lehigh this year as a visiting lecturer,” said Professor Terry Hart ’68, director of Lehigh’s aerospace minor in mechanical engineering and former NASA astronaut. “He brought not only deep technical expertise in hypersonics, but also a contagious enthusiasm for teaching and mentoring others.” Professor Arindam Banerjee, MEM department chair, added: “Geoffrey has been instrumental in helping design an M.S. program in aerospace and space systems engineering. He helped shape our aerospace program as a student and was poised to do even more as a colleague. We enjoyed having him back to teach our students; his loss is heartbreaking, and he will be profoundly missed by all of us who knew him.” Influential Aerospace Educator As an undergraduate, Andrews helped strengthen student involvement in aerospace engineering at Lehigh. REMEMBERING Geoffrey Andrews ’15
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