Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer David Walter Olsen, Practice Areas Elder Law Attorneys. is located in the city of Mattituck, the state of New York. Attorney legal address David W. Olsen, Esq.Po Box 1680Mattituck, NY, 11952-0904. For more information, please call (631) 298-8010 Your comments* (not for publishing) * — Required information David Walter Olsen ← View details David W. Olsen, Esq.Po Box 1680Mattituck, NY, 11952-0904, Mattituck, New York (631) 298-8010