In 1987, Grodenchik got his start in public service, working on the staff of Assemblywoman Nettie Mayersohn, who represented portions of north-central Queens. He would work for her until leaving to become the Queens Regional Representative for then-New York GovernorMario Cuomo, where he worked for two years. Grodenchik would leave in 1991 to become the Chief Administrative Officer for Queens Borough PresidentClaire Shulman, and later served as Deputy Borough President for her successor, Helen Marshall.
Grodenchik announced a campaign for Queens Borough President in 2013, but dropped out to endorse Melinda Katz, who eventually won election to the seat.[4] He would go on to work for Katz after she took office.[5]
New York City Council
In 2015, Councilman Mark Weprin resigned from his seat on the city council to take a position in the administration of New York GovernorAndrew Cuomo. Grodenchik entered the race for the special election to replace him.[6]
In a six-way Democratic primary election, Grodenchik defeated Bob Friedrich, Rebecca Lynch, Satnam Singh Parhar, Ali Najmi and Celia Dosamantes to take the nomination with 27% of the vote. He defeated Republican Joe Concannon, 55%–38%, to win the seat.[7] Grodenchik was sworn into office on November 24, 2015.[8]