Guinzy Construction, Inc. is a Washington County, IL based firm that operates primarily in Washington, Jefferson and Marion counties of Illinois. We have successfully served commercial, industrial, and governmental customers since 1976. Our well trained, experienced staff is equipped with the knowledge and expertise to tackle the most difficult projects. Our principle business activity is heavy construction, which included building and maintenance of highways, roads, bridges and runways. Also our firm is experienced in the construction of multi-level industrial structural steel buildings and precast concrete structures. We are a STAR pre-engineered steel building dealer.