Washington, DC. November 1, 2009. Construction Management Group (CMG) was selected to handle the interior renovation of OPX Architectureís offices and studio space located in Dupont Circle in Washington, DC.ìItís always an honor when a design or architecture firm, such as OPX, asks you to work on their own office space renovation,î said Ken Sugarman, CMGís managing Principal. ìOPX is such a talented and creative firm, I know their office studioís interior renovation will be terrific.îWith offices in Washington, DC and Rehoboth Beach, DE, CMG is a full service commercial and residential construction services firm that specializes in high-end construction projects throughout the DC metropolitan area and the Coastal Delaware region.