Mr. Medina is the former CEO of Puerto Rican Organization to Motivate, Enlighten and Serve Addicts, a nonprofit affiliate of Acacia. Neither he nor Distinctive Maintenance’s management team could be reached for comment.

After the city launched its initial investigation, City Councilman Ben Kallos, a Democrat who represents parts of Manhattan, called for a hearing on nonprofit city contractors.

He said the city should not have to worry about “self-dealing,” especially with funding for the city’s neediest. The hearing hasn’t yet been scheduled.