Essential and marginal functions may require maintaining the physical condition necessary for bending, stooping, sitting, walking, or standing for prolonged periods of time; frequent opportunity to move about and to work outside the office environment for extended periods involving exposure to the elements with weather that will include extreme heat, cold, wind, rain or other inclement weather, walking over rough and uneven surfaces, and routine lifting of up to 35 pounds. For three decades, our best-value companies have provided federal and commercial clients with superior quality and cost-effective, innovative, and sustainable solutions for general construction, restoration services, civil works, fuels systems, environmental services, professional services, and facility support services.