Grzegorz Owsiany 500 Summit Lake Dr Ste 4a Valhalla, New York, 10595 Phone: 914-747-6090 Company Name: Schachter Portnoy LLC Lawyer Category: Securities & Investment Profile Let this business know you found them on Westchester Magazine's Online Directories. Locations Valhalla 500 Summit Lake Dr Ste 4a Valhalla, New York 10595 Claim/Edit Listing