Koeppel was a member of one of the oldest real estate families in New York, and a board chairman at Trinity College in Hartford, Connecticut.
[8] His grandfather and family patriarch, Abraham Koeppel, immigrated to the United States in 1890’s and became a developer of residential properties in Brooklyn.
[6] In 1963, the business was divided with Max Koeppel and his two sons, Alfred and Bevin, taking commercial properties with their headquarters in downtown Manhattan; and Harry and his sons handling the residential properties with their primary office in midtown Manhattan.
[6] In 1988, Alfred and his three children founded a new company known as Koeppel Tener Real Estate Services (KTR).
[6] KTR provides brokerage, valuation, underwriting, environmental, engineering, construction loan monitoring and consulting services throughout the country with its main office in New York and other offices located in Chicago, Dallas and Los Angeles[9] (in 2001, multinational real estate service firm Newmark Grubb Knight Frank made a significant investment KTR).