Bachelor, University Wisconsin, 1988. Master of Arts, University Kansas, 1991. Master of Arts, Sothebys American Arts Course, New York City, 1992.
Postgraduate, City College of New York Graduate Center, 1994. Appraisal certified, New York University, 1993.
Curatorial intern, prints and drawings department Minneapolis Institute Arts, 1988, fine arts technician, 1988-1989. Cataloger, American paintings Sothebys, New York City, 1992. Fine art conservator Thomas Yost Conservation, 1993-1994.
Director American paintings Gerald Peters Galleries, Santa Fe, 1994-1996. President De Doncker Fine Arts, Los Angeles, since 1997. President De Doncker Fine Arts Services, New York City, 1993-1994.
Big brother Big Brothers Little Sisters, Santa Fe, 1995. Member College Art Association, Beverly Hills Community College.