After retiring, Mr. Bortner volunteered with the United Way; family members said he was responsible for setting up its first planned giving program. Mr. Bortner also tutored and mentored students at Roland Park Elementary School.
He was an inveterate Chesapeake Bay sailor. He also enjoyed skiing in New England and the West. He and his wife were world travelers.
A former resident of Homeland and Cloisters, he had lived at Blakehurst since 2015.
Mr. Bortner was a communicant of the Episcopal Church of the Redeemer, 5603 N. Charles St., where funeral services will be held in the chapel at 11 a.m. Saturday.
In addition to his wife, Mr. Bortner is survived by a son, Bret Bortner of Ruxton; a daughter, Birgitta Willikamson of Nashville; and five grandchildren.