OSI is a Structural Steel/Architectural Fabricator and a State Certified General Contractor. The products, services and professional resources of OSI serve many varied retail, commercial and industrial clients in both the USA and foreign venues. OSI is a dealer for Nucor Building Systems and can provide and erect standard or customized pre-manufactured metal buildings. OSI has professional structural engineers registered throughout the USA on staff and in key managerial positions.

Additionally, OSI offers a unique unitized fuel dispensing facility trade named PetroFirst, Inc. This unique design concept provides the retail, commercial and municipal fuel dispensing clients with a less complex, cost effective alternative design to the storage and dispensing of petroleum fuels which minimizes the use of valuable and limited real estate.