Trust, Innovation, Reliability
For over 80 years, Gill-Simpson, Inc. has provided reliable, innovative electrical construction and maintenance services to our industry. We constantly improve our construction and engineering capabilities to mirror the complex electrical systems we provide. Our mission is not complete until our client is 100% satisfied.+continue reading
& Construction Managers
GSI has worked successfully for the largest General Contractors and Construction Managers in the country. Continue Reading
Owners / Developers
Pre-Construction staff at GSI is uniquely qualified to provide engineering, coordination, and cost-benefit services. Continue Reading
& Building Engineers
GSI has an 80 year history of rapid response to the needs of those responsible for the operation of any building or facility. Continue Reading
- September 2013GSI WR Casteel Division will Take on GSI Name
We are pleased to announce that WR Casteel, our branch office located in Hopwood, PA, will begin doing business as Gill-Simpson, Inc. This change will streamline our services to suppliers and customers.
- April 2013Gill-Simpson Recognized as Industry Leader
Gill-Simpson, Inc. was recognized as number 39 in the most recent issue of the Engineering News Record Publication, featuring the nation's top 50 Electrical Contractors.
- July 2013James S. Pattee Joins GSI as the Director of Pre-Construction Services
In July of 2013, Mr. James S. Pattee joined GSI as the Director of Pre-Construction Services for the parent company, and all branches. Mr. Pattee has a wealth of industry knowledge, and the company welcomes his dedication to our industry.
Featured ProjectC4ISR Center for Excellence
Aberdeen Proving Ground, MD +view details