Nuclear Plant Maintenance

With more than 35 years of in-depth experience, Day & Zimmermann is the leading nuclear plant maintenance and modifications contractor in the U.S. and is currently ranked as the #1 O&M Contractor in Power by Engineering News-Record. We partner with more than 70 of the nation's 104 operating commercial nuclear power plants to deliver total plant lifecycle solutions, from refueling outages and online support to major projects.

Day & Zimmermann provides a comprehensive range of cost-effective services that allow our customers to meet the challenges and opportunities presented by today's evolving utility environment. Our success is a result of our dedication to safe, productive work environments and our assumption of full ownership of our assigned workscopes.