Who We Are: C1S Group is a construction and engineering firm based in Dallas, Texas with projects across the US.  Since 2001, we've been designing and building around unknowns to improve the built environment. We are a family of engineers and construction professionals that provide design, consulting, sustainability, and construction management services to manufacturing companies with big design challenges. We are proud to have installed projects for Fortune 500 manufacturers in the food & beverage, aerospace & defense, life science, and technology industries. We are experts in our space, and our clients choose us because we deliver value every step of the way. This value driven relationship is what we're all about. C1S has been ranked in Outside