Your General Contractor, Design-Build Partner, and Self-Performing Trades Team

Sentry is a self-performing general contractor and design-build firm based in Watertown and Sioux Falls, South Dakota. We serve commercial, industrial, agricultural, and infrastructure clients across South Dakota and the Midwest.

Our seven divisions—General Contracting, Electrical, Mechanical, Manufacturing, South Dakota Service, Controls & Automation, and Workover—provide construction, trade, manufacturing, automation, and field service capabilities. We coordinate the teams and resources needed for each project, from planning and construction to installation and ongoing support.