Day & Zimmermann

Day & Zimmermann offers full solar E.P.C. and construction services to distributed generation, utility scale, and commercial/industrial clients. D&Z’s team has ~1 GW of managed project experience in solar energy, including multiple solar projects up to 150 MW. Founded in 1901, D&Z is a family-owned company specializing in construction, engineering, staffing, and defense solutions for leading corporations and the U.S. government around the world. With a workforce of more than 43,000 employees and $2.7 billion in revenue, D&Z ranks as one of the largest private companies in the U.S. by Forbes.

2023 STATISTICS Rank #74 Total Kilowatts Installed 2023: 52,340 Employees: 43,000 Total Kilowatts Installed Since Founded:1,000,000 Primary Market: Community Solar   Primary Service: EPC