Janssen & Spaans Engineering, Inc.
Civil EngineeringIndiana, United States11-50 Employees
Janssen & Spaans Engineering, Inc. is a civil engineering firm founded in 1978 and based in Indianapolis, Indiana, with additional offices in Columbus, Indiana; Chicago, and Florida. It serves government agencies, contractors, and consultants on transportation projects across the United States and internationally. The firm focuses on transportation design for complex bridge and roadway construction. Its engineers are recognized for delivering innovative, cost-conscious designs aimed at reducing construction costs and improving on-site efficiency, including bridges that use post-tensioning in concrete. The company has earned a reputation for distinctive design solutions and has been acknowledged in national and local engineering publications. This footprint combines a regional base with a broader reach in the industry.