With over 20 years of industry experience, On Site Field Supply (OSFS) was started to fill a void in the drilling industry. There were very few drilling production and industrial supply companies, if any, that offered 24/7 delivery service, while maintaining adequate inventory. OSFS strives to fill that void by providing our drilling industry clients with the right materials, the moment they need them, at competitive prices.OSFS is located in the heart of the Marcellus shale region in Pennsylvania. Headquartered in Punxsutawney, PA, the company has two more regional warehouses/offices including Washington and Towanda, PA. Long term, OSFS plans to expand throughout the Marcellus shale region and, eventually, nationwide to bring a level of service to drilling rig operators that is long overdue.