Goodwin Procter, which lured two partners from Gunderson Dettmer Stough Villeneuve Franklin & Hachigian last month, added a third this week when capital markets partner Heidi Mayon joined the firm in Silicon Valley.

Mayon has practiced corporate and securities law in California for 16 years. She joined Gunderson Dettmer’s Silicon Valley office in 2015 from Pillsbury Winthrop Shaw Pittman, where she began her career a dozen years earlier.