Nuts & Bolts Ranked #177 on the 2011 ENR Top 200 Environmental Firms List  Recently profiled in the Spring 2011 Edition of the US Builders Review Primary markets are water and wastewater treatment plants and pump stations. Secondary markets are industrial plant construction and renewable energy. We provide general contracting, subcontracting and design/build services. Primarily work in Maryland, Washington, DC, & Northern Virginia. Over 80 full-time employees. Corporate headquarters in Laurel, MD. We offer pipe fitter, carpentry and millwright apprentice programs which are certified by the Virginia Department of Labor, ABC of Baltimore, and the Department of Veteran Affairs. We self-perform approximately 70% of our contract work. Recipient of 2009 Award of Safety Excellence from ABC Baltimore. We employ people from Pennsylvania, Maryland, Washington, DC, and Virginia. Our workforce includes graduates of Georgia Tech, Virginia Tech, Notre Dame, West Virginia, Cincinnati, Pittsburgh, US Naval Academy, New Hampshire, and Vermont.