CIANBRO
ConstructionMaine, United States1001-5000 Employees
Cianbro is a large, open-shop construction firm that is 100% employee-owned and self-performs a broad range of work across multiple trades. It operates in civil, structural, mechanical, electrical, instrumentation, telecommunications, thermal, fabrication, and coating disciplines, and is based in Pittsfield, Maine. The company serves more than 40 states with thousands of employees and has a seven-decade history focused on safety and dependable delivery. Its client base includes public and private sector organizations undertaking technically complex, historic, and environmentally sensitive projects. In 2026, Plus Power LLC partnered with Cianbro on the engineering, procurement, and construction of an energy storage facility. The firm has also completed government-related projects, such as repairs to seawalls at the U.S. Naval Academy.