Boosting serial sex groper Vito Lopez’s political career was a key job requirement at the government-funded nonprofit he founded and controlled, an FBI investigation found.

Political work by employees of the Ridgewood Bushwick Senior Citizens Council was rated under the euphemistic heading “community participation” in annual performance reviews, FBI probers learned.

The feds’ investigation of the then-Brooklyn assemblyman and Democratic power broker stretched for more than five years from 2007, but resulted in no charges.

Lopez died of cancer in November at age 74.

A Ridgewood Bushwick employee told the feds that he believed some of the council’s executives were “sometimes more interested in campaigning for Lopez” than in the group’s social-services work.

An FBI spokeswoman declined to comment.