Party affiliation: Republican
Law clerk Maine Supreme Judicial Court, Rockland, Maine, 1977-1978. Associate, then partner Vafiades, Brountas & Kominsky, Bangor, 1978-1988. Partner Gilbert & Heitmann, 1988-1990.
Principal Gilbert Law Offices, P.A., since 1990, Gilbert & Greif, P.A. (formerly Gilbert Law Offices, P.A.), Bangor. Co-owner horse farm Grandview Farm, since 2003.
Trustee Hampden Congressional Church, 1988-1991, president 1991-1995. Member of Maine Board Bar Overseers, John Waldo Ballou American Inn Court (treasurer 1999—2001), Penobscot County Bar Association (executive committee 2000-2004), National Board Trial Advocacy (certified civil trial practice), American Judicial Society, Maine Trial Lawyers Association, Maine Bar Association (public affairs committee since 1984), Spee Club, Harvard Club (chairman schools and scholarships committee East Maine chapter).