CxE Group LLC has been a leader in the St. Louis Metro Area for the last 15 years in the fields of energy efficiency and building commissioning. Combining years of mechanical and electrical design experience with a special emphasis on energy efficient operation for both new and existing buildings, CxE has focused on refining the methods that ensure successful design, construction and operation of our client's buildings. In addition to providing independent building commissioning services, CxE has expanded to apply our expertise to energy savings analysis, energy modeling, and building perfomance measurement and verification. We are prequalified with the Illinois Capital Development Board, are listed as a Retrocommissioning Service Provider and a Design Assistance Expert with the Illinois Department of Commerce and Economic Opportunities (IL DCEO), are a registered Trade Ally with AmerenUE in Missouri and Illinois, and are certified as a Technical Assistance Provider with AmerenUE in Missouri.