Day & Zimmermann

Day & Zimmermann is a family-owned company founded over a century ago, specializing in construction & engineering, staffing and defense for leading corporations and governments worldwide. With annual revenues of more than $2 billion, the company has a workforce of over 20,000 employees in nearly 150 locations. Day & Zimmermann has been recognized by Forbes as one of the largest private companies in the United States and serves more than 1,300 customers, including several Fortune 100 companies. The company has a long history of major projects, including the construction of the Panama Canal, and continues to maintain the nation’s power infrastructure, protect American freedoms, and drive technological advancements globally. With a promise of relentless reliability, Day & Zimmermann aims to help its customers do their best work, better.