In 2006, Berman moved in-house to the NHL after more than 3 years at Proskauer Rose.[6] Over her 13 years with the league, she rose to become the NHL's deputy general counsel and vice president of community development.[5] Her responsibilities included the league's corporate social responsibility efforts and running the NHL Foundation.[3][7] During Berman's tenure in the NHL, she was viewed as a candidate to eventually become the first female commissioner of a men's professional sports league,[4] and she was named a "Forty under 40" by Sports Business Journal in 2014.[6]
In 2019, she was named the deputy commissioner and executive vice president of business affairs of the National Lacrosse League (NLL), becoming the first female deputy commissioner of a men's professional sports league.[3] At the NLL, Berman was responsible for the league's growth and legal affairs.[5]
On March 8, 2022, Berman was named commissioner of the National Women's Soccer League (NWSL), the highest professional women's soccer league in the United States, for a 4-year term that began on April 20.[1][3] The NWSL had been without a permanent commissioner since the resignation of Lisa Baird in October 2021. Berman's hiring process was the first to include player interviews, a demand in the wake of the 2021 NWSL abuse scandal.[7]