Dr. Singer ke seithuti sa Fairleigh Dickinson College of Dental Medicine 'me o qetile koetliso ea hae ea morao-rao ho Advanced General Dentistry ho Mount Sinai Medical Center moo a ileng a boela a sebeletsa e le Clinical Instructor. O thehile mosebetsi oa hae oa boinotšing ka 1988 ha a ntse a tsoela pele ka lithuto tse tsoetseng pele tsa bongaka ba meno ba litlolo le bo tsosolosang, ho kenyeletsoa ho phethela Lenaneo le tummeng la Advanced Ultimate Esthetic. Ho phaella moo, Dr. Singer o ile a khethoa ho sebetsa e le Clinical Instructor of Advanced Aesthetic Continuums Univesithing ea New York ho ruta lingaka tse ling tsa meno mekhoa ena e tsoetseng pele. Dr. Singer ke Setho sa The Academy of General Dentistry(AGD) hape ke setho sa The American Academy of Cosmetic Dentistry (AACD) .A sebelisa thepa e sa sebeliseng mercury feela, e lumellanang le bio ho tloha ka 1993, Dr. Singer ke setho sa International Academy of Oral Medicine le Toxicology (IAOMT) mme ke Setho sa Setsi sa Tlhokomelo ea Meno ea Tlhaho (FIND). O sebelisa mekhoa e sireletsehileng ka ho fetisisa bakeng sa ho tlosoa ha mercury fillings ho ea ka IAOMT le Mokhatlo oa Machaba oa Meriana ea Meriana ea Lingaka tsa Meno (IAMFD) e tiileng.
