Wilmer Cutler Pickering Hale and Dorr on Thursday brought on litigator Joshua Lerner in San Francisco, as tech clients aggressively look to protect their most prized possessions: intellectual property.

Lerner’s arrival at Wilmer marks the latest of numerous moves among tech litigators since the beginning of the year. Last week, Orrick nabbed Durie Tangri litigator Ben Au in Santa Monica. In late March, Debevoise boosted its San Francisco team with the addition of Jay Neukom, formerly the IP litigation co-head of Skadden, Arps, Slate, Meagher & Flom.