Early on in his career, Gainey spent six years as a legislative aide to Pennsylvania State Representative
Joseph Preston Jr. Gainey's early career also included a period as a special projects manager under Pittsburgh Mayor
Tom Murphy. Gainey later took a position with the City of Pittsburgh under Mayor
Luke Ravenstahl in a community development role. In 2010, he became chairman of the city's Democratic Party committee. Gainey represented the
24th District from 2013 to 2022. His district included many majority-Black neighborhoods in
Pittsburgh, including Homewood, East Liberty, East Hills, and Lincoln-Lemington, plus the demographically similar adjacent municipality of
Wilkinsburg. Gainey was a member of the
Pennsylvania Legislative Black Caucus. In 2014, while serving in the Pennsylvania state legislature, Gainey joined the board of directors of the
Urban Redevelopment Authority of Pittsburgh (URA), Pittsburgh's economic development agency, eventually becoming vice chair.
Mayor of Pittsburgh In January 2021, Gainey announced his candidacy for the Democratic nomination in the
2021 Pittsburgh mayoral election. Gainey's opponents included incumbent mayor
Bill Peduto, who was running for re-election after two terms in office. While Peduto won high-profile endorsements from institutional players, including eight out of nine members of Pittsburgh's City Council, as well as Allegheny County Executive
Rich Fitzgerald and U.S. Representative
Mike Doyle, Peduto and Gainey split endorsements from organized labor groups, and Gainey won the endorsement of the Allegheny County Democratic Committee and the
Pittsburgh Post-Gazette. Gainey attacked Peduto's performance over his two terms as mayor, accusing the incumbent mayor of failing to pursue tax payments from nonprofit healthcare giant
UPMC and of squandering an opportunity to improve police–community relations after the shooting of
Antwon Rose. In May 2021, Gainey ousted Peduto in the Democratic Primary 46% to 39%, becoming the Democratic candidate for mayor of Pittsburgh in November's general election. Gainey has also appointed Olga George to his office as his press secretary. He has made nominations for the Commission on Infrastructure Asset Reporting and Investment as well, however, they are still pending as the commission fully vets the nominees. ==Personal life==