Gregory Sullivan 933 Mamaroneck Ave Ste 103 Mamaroneck, New York, 10543 Phone: 914-381-3800 Company Name: The Law Office Of Gregory Sullivan Lawyer Category: Real Estate Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Mamaroneck 933 Mamaroneck Ave Ste 103 Mamaroneck, New York 10543 Claim/Edit Listing