Colby Co. Engineering LLC of Portland has been awarded a five-year, $30 million contract to assist the U.S. Navy’s facilities engineering group with designs for building renovations and new construction in support of its submarine overhaul program. Colby Co. is a woman-owned small business with a staff of 37 that includes architects and engineers in the mechanical, fire protection, electrical, structural and civil engineering disciplines, according to CEO Sarah Emily Colby. “This was an extremely competitive contract, and firms throughout the country competed for the opportunity,” Colby said.