Allen & Overy's Los Angeles office is experiencing a notable shift in its partner roster. Josh Birenbaum, a key transactional partner, has transitioned to Kirkland & Ellis, marking the second high-profile exit from A&O in Los Angeles this Monday. This news follows the announcement of Sidley Austin acquiring the services of Andrea Lucan, another former partner and office managing partner at A&O.

Birenbaum's move to Kirkland & Ellis, where he previously held an associate position, is seen as a significant acquisition for the Am Law 100 firm, currently ranked number one. His military background as a second lieutenant in the U.S. Army, coupled with his experience in consulting and private practice, brings a diverse skill set to his new role. At Kirkland, Birenbaum will continue his focus on advising private equity funds and portfolio companies, specializing in mergers and acquisitions, joint ventures, leveraged buyouts, and other transactions. His expertise spans various industries, including technology, consumer products, manufacturing, aerospace, and defense.

Jon Ballis, Chair of Kirkland & Ellis, expressed enthusiasm about Birenbaum rejoining the firm, highlighting his unique skill set as an asset for their private equity clients. Birenbaum's tenure at A&O was relatively brief, having joined the firm last November as a partner in its private equity practice after his time at Winston & Strawn.

Allen & Overy launched its Los Angeles office in 2021, which currently boasts a team of 14 lawyers, including four partners. The firm, in a statement on Monday, expressed gratitude for Birenbaum's contributions during his tenure and extended best wishes for his future endeavors.

Birenbaum's appointment at Kirkland & Ellis marks a new chapter in his career, now as a partner in their Austin office, signaling a continued reshuffle in the legal landscape of major law firms.