Qualified Professionals

Our staff members belong to the Appraisers Association of America, the New England Appraisers’ Association, and/or the Gemological Institute of America. Our in-house staff is assisted by a network of experts in museums, galleries, and universities who serve as advisers in specialized areas.  The principal of Abigail Hartmann Associates, Gayle M. Skluzacek, AAA, wrote the USPAP certification test and has taught appraisal ethics courses at many universities and auction houses including; Sothebys, Phillips, Doyle, Skinner, Heritage, Freemans, and Bonhams.


Gayle Skluzacek

Principal Appraiser


Denise Sheehan

Associate Appraiser

Richard Saidon

Jewelry Appraiser & Consultant 

Kay Brubeck-Ziegler

Florida Representative & Generalist 

Nora Mazur

Decorative Arts Appraiser & Consultant

Kayla Clark

Accounts Manager

Isabella Lugo

Research Associate

William Avis 

Research Associate