O&S Associates Written by Raymond Dickey on September 7, 2016. Posted in Engineering, Reserve Professional O&S Associates Brian J. Bartholomew 145 Main Street Hackensack, NJ 07601 Phone: (201) 397-1864 Fax: (201) 488-7135 bbartholomew@oandsassociates.com www.oandsassociates.com Tags: NJ, NYC Trackback from your site.