Alan Valentine Tishman was a Jewish American real estate developer. He was the head of Tishman Management and Leasing Corporation.

He helped bring coop apartment ownership to New York City

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 and was one of the first brokers to bring office tenants to Park Avenue

Park Avenue (Manhattan)

Park Avenue is a wide boulevard that carries north and southbound traffic in New York City borough of Manhattan. Through most of its length, it runs parallel to Madison Avenue to the west and Lexington Avenue to the east....

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His political activism landed him on the master list of Nixon political opponents

Master list of Nixon political opponents

A master list of Nixon political opponents was compiled to supplement the original Nixon's Enemies List of 20 key people considered opponents of President Richard Nixon. The master list was compiled by Charles Colson's office and sent in memorandum form to John Dean. Dean later provided this...

. He was a trustee of the American Museum of Natural History

American Museum of Natural History

The American Museum of Natural History , located on the Upper West Side of Manhattan in New York City, United States, is one of the largest and most celebrated museums in the world...

 and served as vice president of the UJA Federation.