His projects to date include custom residential work, office buildings, corporate facilities, renovations, additions, interiors, and landscape design. He founded Jan Gleysteen Architect in New York City in 1989, and moved his practice to the Boston area in 1991. Previously Mr. Gleysteen was a project manager at the critically acclaimed firm of Kohn Pedersen Fox Associates, where for seven years he was responsible for several award winning large scale commercial and corporate office projects nationwide.