Headquartered in Kansas City, Missouri, the firm operates from 75 offices across the country and internationally, employing more than 14,500 professionals including civil and structural engineers, architects, environmental scientists, construction managers, and program management specialists who deliver complex, large-scale projects nationwide. This infrastructure engineering firm has been designing and building essential civil and energy infrastructure for more than 125 years, serving clients across the energy, aviation, water, telecommunications, transportation, and healthcare sectors.