Howard is the Chair of the MFA Program and the MFA Committee at Maine Media College. He received his MFA from Vermont College.  He has taught painting, drawing, printmaking, and 2-dimensional design at Rockport College (now Maine Media College), Rockport; Lafayette College in Easton, Pennsylvania; The University of Maine, Augusta; and at the Baum School of Art in Allentown, Pennsylvania.  Mr. Greenberg has served as a senior-project juror and thesis evaluator at Muhlenberg College in Allentown, Pennsylvania and at Lafayette College where he has also been an artist-in-residence in printmaking and has led seminars in Aesthetics and Visual Culture.

Mr. Greenberg has been represented by Schmidt/Dean Gallery in Philadelphia since 1990.  His work has been exhibited in solo and group shows since 1987 at such venues as: the Allentown Art Museum; Kutztown University, Kutztown, Pennsylvania; The Cultural Exchange, Scottsdale, Arizona; The Taller De Arts Plasticas, Oaxaca, Mexico; The University of Maine at Augusta; Tangerine Fine Arts Gallery, Harrisburg, Pennsylvania; Muhlenberg College; Daniel Kany Gallery in Portland, Maine; The North American Cultural Center, San Pedro, Costa Rica and at the Portland Museum of Art.  Mr. Greenberg’s paintings are in numerous public and corporate collections including the Allentown Art Museum; the Bank of Japan; Swiss Re; Ikon; The Vanguard Group; Pepsi; Wharton School of Business, The University of Pennsylvania; Lafayette College and First Union Bank.

Mr. Greenberg is the recipient of a number of awards, grants and fellowships.  Among these are an Art Omi fellowship, as well as First Prize (Mayfair Exhibition, Lisa Dennison curator) and Curator’s Choice (Allentown Art Museum, Lynn Zelavansky) awards.

As a performance artist, Mr. Greenberg has worked in collaboration with dancers and musicians at the Dia Center for the Arts in New York City, the Community Education Center in Philadelphia, Lehigh University in Bethlehem, Pennsylvania, and Kutztown University.  As a member of The Stubborn Trio, he has been a co-recipient of grants from the National Endowment for the Arts and the Pennsylvania Council on the Arts.

Mr. Greenberg is president of Cardinal Point Press, LLC, a concern whose mission is to promote  through publication, the creative collaboration among contemporary artists.  The company’s premier publication, “Doorways,” is a collection of prints by artist David Driskell with prose by Michael Alpert.  Copies of the edition are in the permanent collections at the Portland Museum of Art; The High Museum, Atlanta; and The Phillips Collection, Washington, D.C., among others.