Washington-based Am Law 200 firm Arent Fox has won a lucrative and high-profile deal to conduct a review of the sexual harassment and gender discrimination policies of one of the largest brand names and companies in the tech sector—even though the firm has never done employment work for the company before.

Microsoft revealed in a statement Thursday that it had contracted the firm, saying Arent Fox is “experienced in these matters and has not previously been involved in representing Microsoft in employment matters, nor has it done a significant amount of work for the company in the past.”