Derek Zaba has joined Sidley Austin as a partner in the firm’s global M&A and Private Equity group and co-leader of the shareholder activism practice.

Zaba is joining Sidley in Northern California from PJT Camberview Partners.

Zaba will focus his practice on counseling boards and C-suite executives of public companies in shareholder activism matters and contested M&A transactions, as well as on corporate governance concerns.

“Derek will augment our impressive shareholder activism practice,” said Kai Liekefett, Sidley partner and leader of its shareholder activism practice. “With shareholder activism at record levels, Derek’s extraordinary skill set and deep knowledge will enhance our ability to serve clients facing these issues.”

Zaba joined Camberview in 2015 and ultimately served as the head of its activism and contested M&A practice. At Camberview, he advised clients of all sizes and industries on activism-related matters. Previously, Zaba was an investment professional at two hedge funds. He started his legal career as a corporate attorney at Wachtell, Lipton, Rosen & Katz.