In 1997, Gershengorn joined the law firm of Jenner & Block, rising to the level of Partner in the firm's litigation department, working in the firm's Appellate and Supreme Court Practice and in its Communications Practice.[4] While at the firm, Gershengorn was very active in representing Indian tribes in Supreme Court and appellate litigation.[5] Gershengorn is listed in a Halland v. Brackeen amicus brief with Kathryn Fort, former Ambassador Keith M. Harper, Matthew S. Hellman, Zachary C. Schauf, Loenard R. Powell, Victoria Hall-Palerm, and Keven J. Kennedy.[6][7]
In his deputy assistant attorney general position, Gershengorn was known for his work in defending legal challenges to President Obama's signature legislative achievement, the Patient Protection and Affordable Care Act.[2]
On June 2, 2016, it was announced that Donald B. Verrilli Jr. was stepping down as Solicitor General and that Gershengorn would become Acting Solicitor General effective June 25, 2016,[8] which he remained until resigning at the end of Obama's term on January 20, 2017 because the Republican Senate majority did not deal with a replacement anymore.
Personal life
On September 1, 1996, he married Gail Felice Levine in Dallas, Texas. Gershengorn's wife has worked as a lawyer for the United States Department of Justice, as have two of his sisters.[2] His father is a cardiologist and his mother, Wendie Gershengorn, was a state court judge in Massachusetts. He and Gail have three sons.[2][9]