Washington-based international law firm McDermott, Will & Emery announced the addition of Ellen K. Harrison as a partner.

Harrison, who will be based in the firm’s Washington Private Client practice, previously served as a partner at Pillsbury Winthrop Shaw Pittman, another Washington D.C.-area firm.

Harrison’s practice focuses on estate planning and administration, tax controversies and U.S. and international income, gift and estate tax planning for high-net-worth clients.

The addition is part of McDermott’s continued expansion of its Private Client practice in international estate planning. Earlier this year, the firm founded the Washington practice and added new partners to it’s London Private Client practice.