Welcome to Alliant Construction

A Division of Ergon Construction Group

A premier construction contracting company, Alliant Construction is the resource for our customers and the preferred general contractor for our subcontractors and suppliers. And we provide rewarding careers for our employees. We work with private owners, developers and government agencies to complete commercial construction projects of all shapes and sizes. Customers also call on us to conduct renovations and other maintenance projects. Our team is committed to the values of hard work, great customer service and unmatched quality.

About Ergon Inc.

Ergon Construction Group’s parent company, Ergon Inc., is a privately owned company that operates in seven primary business segments: Refining & Marketing, Specialty Chemicals, Asphalt & Emulsions, Midstream & Logistics, Oil & Gas, Construction & Real Estate, and Corporate.

The Ergon Connection

Alliant is a small company with big company backing in Ergon. In addition to our division, Ergon Construction Group also includes Ergon Maintenance Services (an industrial construction and maintenance contractor) and ISO Services (specializing in insulation for tanks, piping and equipment; steam and electric tracing; blasting; painting; fireproofing; and scaffolding). Customers benefit from the efficiencies and synergies of our divisions as well as shared services such as accounting, health and safety, engineering and more.

Our Core Values


We are committed to a safe and healthy work environment for our employees, subcontractors, and customers at job sites, offices, shop facilities and other project locations. Learn more about our companywide safety commitment here.


We are committed to being truthful, trustworthy, and transparent in our dealings with customers, suppliers, subcontractors, professional associates and any others we deal with in the course of our business.


We are committed to providing services that are of the highest quality and that comply with all customer requirements.

Work Ethic

Our employees share a belief in the importance of our work and in working hard to deliver an exceptional service to our customers.