The former head of O’Melveny & Myers’ global M&A and private equity practice, Steven Tonsfeldt, has joined Cooley’s Palo Alto office, Cooley announced Monday.

Tonsfeldt, 55, had been a partner at O’Melveny since 2009 and assumed his practice leadership position at the firm in 2011. O’Melveny appointed Paul Scrivano as its new global M&A and private equity practice group leader last week.