About Us

Total Plant Lifecycle Solutions


Integrating engineering, construction, maintenance, fabrication and machining, and specialty services to deliver comprehensive solutions to our customers' toughest challenges.

Day & Zimmermann's Engineering, Construction and Maintenance (ECM) group is one of the nation's leading providers of total plant lifecycle solutions for the power, process and industrial markets. With more than 15,000 employees, a network of strategic locations, and a proud history of more than 100 years, Day & Zimmermann ECM has developed a portfolio of offerings designed to maximize value creation for our customers.

Leveraging wide-ranging capabilities, long-standing industry experience, innovative technology, and expert project teams, we deliver complex projects safely, on time and within budget. Our unique approach employs seamless processes that effectively manage all aspects of the plant lifecycle, from first groundbreaking to online support and on through the end of plant life. Day & Zimmermann's end-to-end approach ensures projects are efficiently managed and result in cost-effective plant service.

Power, Process and Industrial Expertise


We are deeply embedded in our chosen markets, with key competencies in the power, process and industrial sectors. Our resume of experience in these markets includes an impressive list of successfully completed projects that cut across engineering, construction and maintenance, to fabrication, condenser and valve services. From nuclear and fossil plants to specialty chemical producers, Day & Zimmermann customers reap the rewards of shortened cycle capital projects, optimized operations and maintenance investments, and a safe, secure environment for all stakeholders.

Click Here To Download:
Datasheet: Professional Staffing Services
Datasheet: Nuclear Plant Maintenance
Brochure: Managed Maintenance Solutions
Datasheet: Fossil Plant Maintenance
Brochure: Engineering Construction And Maintenance
Datasheet: Valve Services
Datasheet: Condenser Services
Datasheet: Fabrication & Machining
Datasheet: Radiological Services