Donald H. Sienkiewicz concentrates his law practice in estate planning, real estate, and general business law. He has practiced with the firms of Rath, Young, & Pignatelli, P.C., in Concord, New Hampshire, and Goodwin Procter LLP, in Boston, Massachusetts. He served as law clerk to the Honorable Peter W. Kilborn, Chief Justice (retired) of the Massachusetts Land Court. He is counsel to the New Hampshire Farm Bureau, a Director of the Greater Manchester Homebuilders Association, and a Trustee at Pine Hill Waldorf School in Wilton, New Hampshire.