Brady, Connolly & Masuda P.C. added Karen E. Zimmermann and Dylan R. Besser as associates.Besser concentrates on civil litigation and insurance defense.Zimmermann focuses on workers’ compensation defense. • Katten Muchin Rosenman LLP added Bret T. Diskin to the firm’s corporate practice as a partner.Diskin’s practice focuses on public and private mergers and acquisitions, private equity transactions, joint ventures, initial public offerings and other capital markets transactions …