Ulmer & Berne LLP elected Christiane M. McKnight and Christopher D. Seps to partner.McKnight is a business litigator who represents clients in complex commercial litigation in state and federal courts. Seps is a financial services litigator who focuses his practice on complex litigation and arbitration in the securities and commodities industries.• Aronberg Goldgehn Davis & Garmisa added Gary P. Hollander as a member to the firm.Hollander concentrates his practice on disputes involving shareholders and …