PALO ALTO — Perkins Coie has poached an emerging companies and venture capital partner from Sheppard Mullin. Jonathan Atzen joined the firm’s Los Angeles office June 5.

Ron McIntire, office managing partner of Perkins Coie’s Los Angeles office, called Atzen a great addition to the firm. “His strong ties to the southern California technology community, entrepreneurs, angels and venture capital sources bolsters our local bench and his stellar reputation is an excellent fit for our leading emerging company practice,” he said in a statement.

Atzen spent four years at Sheppard, Mullin, Richter & Hampton, where he focused on software, life sciences, wireless communications, and clean/alternative energy technologies. His corporate experience spans equity and debt offerings, venture capital financings and mergers and acquisitions, as well as offerings, spinoffs and Securities and Exchange Commission reporting and compliance.

He joined Sheppard Mullin from DLA Piper. Prior to that, he served as general counsel at Advanced Cell Technology Inc., a Santa Monica-based biotechnology company applying stem cell technology in the field of regenerative medicine. Atzen was unavailable for comment.

In a statement, Melanie Rubocki, cochairwoman of Perkins Coie’s emerging companies and venture capital practice, said Atzen’s in-house experience and insight would be especially helpful in serving clients. “His work for private and public companies is especially helpful for high-growth companies,” she added.

Contact the reporter at callison@alm.com.