Supreme Court veteran Nicole Saharsky is joining Mayer Brown’s Washington office to co-chair its Supreme Court & Appellate practice, the firm announced Nov. 28.

The move comes barely one year after Saharsky joined Gibson Dunn’s Washington office to co-chair its Appellate and Constitutional Law Practice Group.

Saharsky told Bloomberg Law that she made the move because Mayer Brown is a better fit for her.

“Gibson Dunn is a great firm,” she said, but she couldn’t “pass up the opportunity to become one of the leaders of the firm’s outstanding Supreme Court & Appellate practice.”

Saharsky joins Andrew Pincus, Lauren Goldman, and Evan Tager to help lead the group, which suffered a shocking loss in August when its founder, Stephen Shapiro, was gunned down in his Chicago home in a domestic dispute.

As one of the nation’s top Supreme Court litigators, Saharksy brings a wealth of experience to Mayer Brown. She’s argued the second-highest number of cases before the high court of any woman currently practicing—29. Lisa Blatt, head of Arnold & Porter’s Appellate & Supreme Court practice has argued 37 cases.

Mayer Brown is actively working on supporting and promoting women attorneys, Saharsky said, adding that she’ll make mentoring of female associates one of her priorities.

Saharsky worked for 10 years as an assistant to the solicitor general prior to joining Gibson Dunn. During this time, she briefed 45 cases on the merits and filed hundreds of certiorari-stage briefs and motions. She has experience handling securities, intellectual property, labor and employment, bankruptcy, personal jurisdiction and corporate criminal liability cases.

Saharsky said her favorite Supreme Court win was in U.S. v. Hayes, a 2009 case that slightly broadened the definition of those who can’t obtain firearms.

The issue was whether the federal prohibition on firearm ownership applies when the offender actually was convicted of assault or battery in the domestic setting, but the relationship between the offender and victim was not an element of the offense.

The case “is about keeping guns away from people convicted of domestic violence offenses,” Saharsky said.

It’s important “because it had a real world impact in terms of keeping people safe,” she said.

With assistance from Madison Alder