From 1991 to 2013, she served as a judge on the Philadelphia County Court of Common Pleas, presiding over both civil and criminal matters.[6] Her nomination to that court in 1990 by Pennsylvania GovernorRobert P. Casey was controversial with local Democratic and Hispanic leaders because she was a political novice whose earlier employment by the federal government had barred her from participating in party politics.[7] Her nomination languished in the Pennsylvania Senate for over a year and she was only confirmed once that she had won election to the court. She ran for the court in 1991 without the support of the Democratic machine. In the decisive Democratic primary, she placed 10th of 34 candidates seeking 16 vacancies.[8] She then won the general election in November 1991.[3] She later said that running for office gave her the "thick skin" required of a judge.[4] She retained her seat in the elections of 2001 and 2011.[3] She was the first Hispanic woman to serve on that court.[9][5]
Quiñones is an out lesbian.[10] She is a member of the Hispanic Bar Association of Pennsylvania.[11]
Federal judicial service
On November 27, 2012, President Barack Obama nominated Quiñones to serve as a United States District Judge of the United States District Court for the Eastern District of Pennsylvania, to the seat vacated by Judge Richard Barclay Surrick, who assumed senior status on February 1, 2011. The nomination was made on the recommendation of Senator Bob Casey, Jr.[10] She is the first Latina lesbian to be nominated to a federal judgeship.[1][6] Her nomination was confirmed by voice vote on June 13, 2013. She received her commission on June 19, 2013.[5]