A partner at employment law giant Ogletree Deakins is accused in a new lawsuit of sexually harassing a junior attorney and retaliating when the younger man complained.

The former staff attorney filed his complaint Feb. 21 in the California Superior Court as “John Doe” because of the explicit nature of the allegations he is lodging against the law firm. He says that other Ogletree attorneys and staff were unresponsive and unhelpful when he reached out for assistance.

Ogletree is currently...