Margaret A. Clark was admitted to the New York State Bar and the United States District Court, Southern and Eastern Districts of New York, in 1981. She received her undergraduate degree from Cornell University's College of Arts and Sciences and her law degree from Pace University School of Law where she was a Merit Scholar. During her final year of law school, she served as a teaching assistant for Legal Methods.  After graduation from law school, she taught as an Adjunct Professor of Business Law at Marymount College, Tarrytown, New York.

 In 1987, Ms. Clark opened her own practice in North Salem, New York.  She is now also located in Katonah, New York.

Ms. Clark was recommended to serve on the Committee on Character and Fitness for the Ninth Judicial District in 2002, and has remained on the Committee since.  She was Special Counsel to a Northern Westchester town for twenty-four years. Currently a member, she held the office of President to the Northern Westchester Bar Association from 1990-1991. She is also a member of the Westchester County and New York State Bar Associations as well as the Westchester Women's Bar Association.

Ms. Clark’s practice is focused in Family Law; Matrimonial Law; Collaborative Divorce; and Adoption Law. She also practices in the area of  residential Real Estate Law. She is certified to act as an attorney for children by the Appellate Division, Second Department and is a member of the New York Association of Collaborative Professionals, currently serving as President of the Board of Directors.   For over fifteen years, she has earned an “AV Preeminent” rating from the Martindale-Hubbell rating system and for the past two years has been named as a "Super Lawyer" by Thomson Reuters.