The cause of death is unknown, but Friedman, 55, reportedly suffered from diabetes and was undergoing dialysis treatment.
“We lost one of Queens' most ardent promoters and supporters in Jack Friedman,” said State Senator Joseph Addabbo in a statement shortly after his passing. “Jack left a permanent imprint on Queens through his work with the Chamber of Commerce and just his work with people every day.”
Addabbo said Friedman was especially active in his district following the Superstorm Sandy.
“After Superstorm Sandy ravaged my district, I worked with Jack and very much appreciated his efforts in helping businesses rebuild,” he said.
Before taking over as head of the chamber, Friedman served as chief of staff for now-Assemblyman David Weprin when he served in the City Council. He was also a member of Community Board 13 and was chair of the board's Economic Development committee.
The married father leaves behind two children, Cara and Daniel.
Friedman was also a board member of the Bellerose Jewish Center, Lifeline Center for Child Development and Services Now for Adult Persons (SNAP).
Bill Driscoll, who is active in the Queens political and business communities, recalled Friedman as a tireless advocate for the borough.
“Jack is a good friend who had Queens on his mind every day,” said Driscoll.
Borough President Melinda Katz said Friedman would be missed by the entire borough.
"Jack Friedman was a beloved staple of the Queens business and civic community," she said. "Jack was fiercely committed to making Queens a key center of economic opportunity and prosperity."