Audry Casusol has joined Sidley as a partner in its tax and employee benefits and executive compensation practice. She was previously a partner at Greenberg Traurig.

Former federal prosecutor David Siegal has joined Mintz Levin as a member. He joins from Haynes and Boone, where he co-chaired that firm's government enforcement and litigation practice group.

Dentons has elevated Curtis Stefanak (corporate) and Kristin Weil (international dispute resolution) to partner.

William Haddad has joined Venable as a partner in the firm's corporate practice. He joins from Cooley.

Eliot Kirshnitz has become senior counsel at Newtek Business Services in Lake Success, N.Y. He was formerly special counsel at the New York Liquidation Bureau.

Dianna G. El Hioum has joined Fox Rothschild as a partner in the firm's intellectual property department. Prior to joining, she was managing partner of Merchant & Gould's New York office and served as chair of its shooting sports practice.

Pepper Hamilton has added Paul Porretta as a partner in the firm's Employee Benefits and Executive Compensation Practice Group. Before joining he was a partner with Morrison Cohen.

Tully Rinckey has added Kevin Yeager as a partner in the firm's Binghamton office. Prior to joining, he operated his own real estate practice for over 20 years.