John G. Esswein, 90, a Navy captain and physician who retired in 1967 and then spent 20 years as student health director at Georgetown University, died Jan. 2 at his home in McLean. He had leukemia.

Capt. Esswein spent 24 years in the Navy, and his assignments included chief of medicine at the National Naval Medical Center in Bethesda. His final active-duty assignment was at the Navy Bureau of Medicine and Surgery.

John George Esswein, a native of Brooklyn, N.Y., was a 1942 graduate of Georgetown and a 1945 graduate of Columbia University. While working at Georgetown, he received a master’s degree in liberal studies from the university and worked as a physician at the Washington Home hospice.

He was a member of Sigma Xi medical honor society and the American College of Physicians. He was a docent at Washington National Cathedral.

He enjoyed making art in mediums including stained glass, wood and needlework.

Survivors include his wife of 67 years, Jean Murphy Esswein of McLean; five sons, Robert Esswein of Mountain View, Calif., Paul Esswein of Carson City, Nev., John Esswein Jr. of Gainesville, Va., Stephen Esswein of Cupertino, Calif., and Mark Esswein of Vienna; a brother; and 10 grandchildren.

— Adam Bernstein