Stephen is an active member of the philatelic community. He is well-known amongst organized philately as being the current President of the American Philatelic Society along with serving on the board of various groups and organizations including The Collectors Club of New York (Board of Governors and Program Chairman), American Air Mail Society (Treasurer) and New York 2016 Stamp Show (Organizing Committee in charge of Judges and Judging). He is the past-President of the Collectors Club of New York and the American Air Mail Society.
In regards to exhibiting, Stephen is an accredited F.I.P. international philatelic judge having past served as the Chairman for the F.I.P. Aerophilately Commission. Domestically, he is an American Philatelic Society accredited judge and jury chairman having past served as the Chairman for the Committee on the Accreditation of National Exhibitions and Judges.