Donald B. Mark began practicing elder law in the 1980s, before it was known as elder law. Due to the aging population, his services were in demand and, eventually in 1992, he started his own law office devoted to elder law.
In 2000, he became a Certified Elder Law Attorney through the American Bar Association approved program with the National Elder Law Foundation. There are only 38 Certified Elder Law Attorneys in New Jersey. Mr. Mark is a member of the bar of New Jersey, Pennsylvania, and the United States Supreme Court.