CSDG was established in 2001 as Civil Site Design Group by a multidisciplinary team offering a depth of experience, knowledge, and steadfast commitment to a diverse roster of clients. The company has transformed to strategically moving beyond its civil speciality to build a team of professionals from diverse disciplines, including planners, landscape architects and designers, and transportation specialists. 

CSDG is like two different firms that function as one, with more than 40 people combined, located in Nashville, Tennessee, and working mostly in the local area. Sean DeCoster, Principal at CSDG, is a Civil Engineer and a Project Manager, but is also responsible for managing their IT functions and oversees the financial aspects of the business.