Sellers Treybal Structural Engineers (STS) is an experienced consulting engineering firm operating in Vermont and licensed in several states. STS serves both public and private clients and offers service from their main office in Williston, Vermont and part-time office in Middlebury, Vermont.

Greg Sellers and John Treybal founded STS in January 2014 and both bring expertise in a wide range of projects and building methods and materials to STS. We have project management experience covering all aspects and phases of a project from early schematic level design through construction and completion of a project.

We believe that working in a collaborative approach with the other consulting and construction team members leads to a successful project for the client and owner. We offer this approach with the capabilities of a larger firm, while delivering the hands-on principal involvement of a small practice. Our experience, insight, and a willingness to use state of the art ideas allows us to arrive at the appropriate structural systems and solutions for a given project.

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