Upon completing his education, Cormac began his legal career by clerking at Casey, Lane & Mittendorf. This experience laid the foundation for his future endeavors in the legal field. In 1978, he successfully passed the New York State Bar Examination, marking the beginning of his illustrious career as an attorney.
In 1979, Cormac returned to City Island to establish his own law practice. For 45 years, he has dedicated himself to serving the legal needs of individuals and families on probate, real estate, trusts, wills, elder law, estate planning, estate litigation, and other areas of law throughout the greater New York City area.