303rd Engineering Group, LLC

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10420 Baur Blvd
Saint Louis, MO 63132

The 303rd Engineering Group, LLC is a St. Louis, Missouri-based professional engineering firm specializing in Mechanical, HVAC, Electrical, and Plumbing design. Established in 2005 by Charles K. Fiedler, the firm has successfully completed over 2,000 projects, with 85% of its work coming from repeat customers across various sectors including government, healthcare, commercial, industrial, residential, and institutional.

With a commitment to delivering high-quality engineering expertise, the 303rd has undertaken notable projects such as the new Airmen's Dormitories at Scott Air Force Base and the Naval Special Weapons facility in Crane, Indiana. The firm's diverse portfolio also includes engineering design for churches, libraries, schools, commercial buildings, and assisted living facilities throughout Missouri and Illinois.

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