Airmen's Dormitories, Scott Air Force Base
Illinois · Defense · Client: U.S. Air Force

Successful Partnerships, Successful Projects
303rd Engineering Group, LLC is a full-service MEP engineering firm based in St. Louis, Missouri, providing electrical, mechanical/HVAC, and plumbing design for public and private clients across government, healthcare, commercial, industrial, residential, and institutional sectors. Founded in 2005 by Charles K. Fiedler, P.E., it has delivered over 2,000 projects with an 85% repeat-client rate, including military facilities, state park visitor centers, hospitals, cancer treatment centers, schools, churches, libraries, commercial buildings, cold-storage warehouses, and assisted-living facilities throughout Missouri and Illinois.
LEED AP
Charles K. FiedlerFounder
Provides electrical engineering design for commercial, government, healthcare, educational, and institutional facilities throughout Missouri and Illinois.
Delivers mechanical and HVAC engineering design across government, healthcare, commercial, and institutional facility types.
Government · Federal · Defense · Healthcare · Commercial · Retail · Financial Services · Education · Religious · Arts & Culture · Senior Living · Multifamily Residential · Residential · Industrial · Parks & Open Space · Freight & Logistics · Sports & Recreation
Illinois · Defense · Client: U.S. Air Force
Crane, Indiana · Defense · Client: U.S. Navy
Missouri · Parks & Open Space
Missouri · Healthcare · Client: Missouri Department of Mental Health