ā€œC1Sā€™s expertise helped us target the right energy conservation projects for our 26-year-old headquarters building to meet EPA Energy Star Standards and attain LEED EB Gold certification.ā€
ā€” George Guck, Frito Lay North America

Unique Solutions for Existing Buildings

C1S Group finds unique solutions for existing buildings, combining Engineering, Construction and Sustainability into one complete service offering so that our projects incorporate functionality, energy efficiency, maintainability and value.

With a client list that varies from local, independent business owners to Fortune 500 companies, C1S has the expertise and agility to execute a wide range of projects nationwide.


C1S provides Mechanical, Electrical, Plumbing (MEP) and Process engineering, design, and consulting services to the commercial, manufacturing and industrial markets. Our professional MEP engineering staff has design experience on hundreds of projects both locally and across the U.S.


C1S offers turn-key construction management services for existing facilities. Led by a team industry-leading experts in various specialties, including the design-build project delivery method, we complete projects on time and within budget. And we follow the C1S way: listen, think, execute.


C1S offers sustainability services with the commercial, manufacturing and industrial markets in mind. We provide solutions that promote efficiency, maintainability and value, preparing industrial facilities to meet the challenge of increasing productivity while reducing resource consumption.