Sigma Engineers and Constructors (SEC) is a professional engineering firm that provides specifically tailored services to meet the needs of North America's oil, gas, and petrochemical industries.
SEC provides a complete range of engineering, design, and construction services for the petrochemical, refining, polymer, and utility industries. We have extensive experience in detailed engineering, design, and drafting for a wide range of disciplines including civil, structural, architectural, process and process control, mechanical, piping, electrical, instrumentation and automation, safety, and environmental. SEC also has extensive exp...