[5] O'Hearn was a partner at the law firm of Brown & Connery LLP in Haddonfield, New Jersey from 1993 to 2021.

[5] In 2007, she represented Gloucester County Institute of Technology against allegations that a teenage student had been abused by her swim coach for six years.

[6] In 2011, she defended Gloucester Township Public Schools against multiple claims of alleged pervasive and persistent racism.

[6] In 2012, O'Hearn defended the borough of Pine Hill, New Jersey, against allegations that an employee had been sexually harassed by the mayor.

[9] Her nomination was criticized by some progressives, including the magazine The American Prospect, which said that she had "fought against workplace sexual harassment cases, defended police departments, and represented management during union drives.