Mary Ruth Kapsiak began her career as a NYNEX Corporation Customer Service Representative employed in Business Marketing. She served as Chairperson of the Upstate Union and served on the National Organizing Committee, and was a member of the National Coalition of Black Trade Unionist. She was a special education teacher and reading teacher at Community School #53 in Buffalo. She served as Assistant Principal at Dr. Lydia T.Wright School of Excellence # 89 and ended her career with the Buffalo Public Schools as Supervisor of Elementary Education in 2006.
On May 1, 2007, Mary Ruth was elected to the Buffalo School Board as Central District Representative; July 2nd she was installed as Central District Representative, and on the same day she was elected President of the Buffalo School Board. Her professional associations include the following: Life Membership in the N.A.A.C.P, and serves on the Executive Committee of the N.A.A.C.P., Membership in Kappa Delta Pi International Honor Society; Vice President of the Metro Buffalo Alliance of Black School Educators; Member of The National Association of Black School Educators; Member Phi Delta Kappa Professional Organization; Member Delta Kappa Gamma Society International; Alpha Kappa Alpha Sorority, Inc., Xi Epsilon Omega Chapter; Board of Directors, Women for Human Rights and Dignity; Past Board of Directors of the Buffalo Urban League, University at Buffalo Alumni Association; Canisius College Alumni, and State University of New York at Buffalo.