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Whether Sigma is the general contractor, we won’t compromise when it comes to quality or safety.

We brings the latest advances in construction to every project. Sigma commitment to quality and extensive warranty support have led to long-term relationships and repeat business from clients in a variety of markets. Our construction team seamlessly works with other disciplines to deliver facilities that meet or exceed expectations.


Our team of experts Professionals have in-house crews dedicated to modifying any existing structures which include in-house certified welders. Additionally, we have a network of trusted and approved subcontractors. Although separate entities, our modification team is able to consult with our engineering departments on any unforeseen on-site issues that may arise during construction.

Our goal is to provide clients with the best service in the industry and tailor projects to their individual needs.


Our maintenance teams are equipped to perform maintenance repairs on a variety of structures including but not limited to building, self-support towers, rooftops, and water tanks. We can handle extensive long-term contracts such as urgent one-time issues that may arise as a result of a routine inspection.

Our project managers work with our maintenance crews and various inspection departments to ensure issues are being effectively and promptly corrected.