He was born in White Plains, N.Y., resided most of his life in Greenwich, and for the past 11 years wintered in Vero Beach.
Schoeller graduated from the Loomis School in 1953 and was an English Speaking Union Scholar at Brighton College in England from 1953 to 1954. He received his bachelor's degree from Williams College in 1958, and attended his 50th class reunion in Williamston last June.
In his youth, he taught sailing at The Riverside Yacht Club and The Belle Haven Club during the summer. He competed in the Newport to Bermuda Race in 1972 on Jim Grant's boat, Irina.
Schoeller retired from The First Boston Corporation in New York City, and then became a realtor for Prudential Connecticut Realty in Greenwich.
He was a member of The Round Hill Club and The Horseneck Club, The Moorings Club in Vero Beach, the Williams Alumni Vero Beach Chapter. He enjoyed volunteering as a Red Baron at The Greenwich Hospital.
Survivors include his wife of 26 years, Marcia O'Donnell Schoeller of Greenwich and Vero Beach; a daughter, Mildred Boyd Schoeller of Delray Beach, Fla.; a son, Karl Christian Schoeller of West Palm Beach, Fla.; a stepson, Christopher N. Snyder of Boston, Mass.; a stepdaughter, Alexandra C. Snyder of West Palm Beach, Fla. and two grandchildren, Coco and Lilly Schoeller of West Palm Beach.