Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer Kelsey L. O'Brien, Practice Areas No known practice areas. is located in the city of Lake Success, the state of New York. Attorney legal address 1983 Marcus AvenueLake Success, NY, 11042. For more information, please call (516) 488-3300 Your comments* (not for publishing) * — Required information Kelsey L. OBrien ← View details 1983 Marcus AvenueLake Success, NY, 11042, Lake Success, New York (516) 488-3300