Winston & Strawn LLP has added Sharon Desh as partner in the firm’s Chicago office and as a member of the firm’s Litigation Practice.Desh focuses on multidistrict, class action, and complex commercial litigation. She defends clients in high-stakes federal- and state-court mass tort, product liability, antitrust, and patent cases.• Sheppard Mullin announced its 2022 partner promotions, including David Poell in the firm’s Chicago office.Poell is a member of the firm’s Business Trial practice …