[3][4][5][6] Singer later moved to Texas and starting up an oil refinery in Corpus Christi, which he later sold to Citgo during the Second World War.
[9] In 1982, he founded the Herbert and Nell Singer Foundation, aimed to support medical and other organizations in New York and Connecticut, where he and his wife had a home.
[10] He was a former president of Beth Israel Medical Center in New York City, a post once held by his father in the 1920s.
[1] He was also a chairman of the American Jewish Joint Distribution Committee, a founding president of the Jewish Communal Fund of New York, a trustee of the United Hospital Fund of New York, and a director of the 14th Street-Union Square Local Development Corporation, now known as Union Square Partnership.
He was survived by his wife, children, two sisters, and his brother Edwin Singer, a philanthropist in Corpus Christi, Texas who served on the board of The International Herald Tribune in Paris and helped establish the Art Museum of South Texas.