Serving the door industry since 1987, Negwer Door Systems is the premier supplier and distributor of custom and commercial do ... ors, frames and hardware in Central and Eastern Missouri and Central and Southern Illinois. Our team of experienced project managers, estimators, detailers, welders, and salespeople work closely with you throughout the design, estimating, submittal, purchase and delivery phases of your project. The result? On-time, accurate door, frame, and hardware delivery to your job site, every time. Negwer Door Systems offers a variety of door services and solutions for a complete door management system. From specification writing to custom fabrication and field services, we are your indispensable resource for a complete turnkey solution for all your commercial door and hardware needs read more