PEC Structural Engineering PEC STRUCTURAL ENGINEERING, INC, is one of the fastest growing consulting structural engineering companies in the Southeast. Our firm has offices located in Huntsville, Alabama and Atlanta, Georgia - and our engineering staff has more than 60 years of combined experience. PEC does more than size beams and columns - we work with our clients to find economical solutions to engineering challenges. Our clients have come to rely on the high quality of service that comes from combining creativity with cooperation.