Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer Desmond J. O'Sullivan, Practice Areas No known practice areas. is located in the city of Port Jefferson, the state of New York. Attorney legal address 21 Waterview DrPort Jefferson, NY, 11777-1169. For more information, please call (858) 314-7794 Your comments* (not for publishing) * — Required information Desmond J. OSullivan ← View details 21 Waterview DrPort Jefferson, NY, 11777-1169, Port Jefferson, New York (858) 314-7794