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Day & Zimmermann's maintenance and construction services focus on improving industrial facility performance and availability through asset reliability and equipment uptime.

Markets We Serve


Metals & Mining

Food & Beverage




Industrial Construction

We deliver complex projects safely, on time, and within budget by leveraging wide-ranging capabilities, longstanding industry experience, innovative technology, and expert project teams. You can rely on our flexible execution models and ability to work in any labor environment. Our commitment to safety, quality, and talent development means we attract and retain highly skilled labor to meet your high expectations for quality, innovation, and productivity.

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Facility Maintenance to Maximize Uptime

Improve your facility performance and availability through asset reliability and equipment uptime. We help you meet your key performance metrics by maintaining, upgrading, and expanding processes and responding to your needs by delivering everything from supplemental contingent workforces to full managed-task and standalone project execution. You get a single point of contact to drive accountability and consistency across safety, human performance, cost, schedule, quality, and resource supply.


Industrial Services



Welding & Fabrication




Committed to Safety In Industrial Plants

Our number one goal is to maintain a safe workplace that protects our employees and customers from injury or illness. Eliminating incidents takes commitment and an understanding of roles, responsibilities, and safety processes at all levels of the organization. That’s why we engage and  empower craft and staff across our workforce with tools, training, and processes to help them look out for one another. 

The results speak for themselves – in 2022 we maintained a 0.53 Total Recordable Incident Rate (TRIR) with more than 16 million work hours across the U.S. This is simply a continuation of our outstanding safety record. Working safely is not just the right thing to do it is also good business, raising both morale and uptime.


Meeting Your Labor Needs

As your need for qualified, skilled craft grows so does the competition for talent. Fueled by funding and infrastructure investments, the demand for skilled craft jobs is skyrocketing.

To provide the labor you need we partner with industry organizations, the union Building Trades, our customers, schools, students, educators, parents, and others in the communities we serve to address the challenge on both the local and national levels. We speak out — as a company and through our individual thought leaders — as often as possible about the benefits of craft careers in social media, at industry events, schools, and even with legislatures.


What We Do

Maintenance & Modifications

Our Total Accountability Model provides a single point of contact driving accountability across safety, human performance, cost, schedule, quality, and resource supply.

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Projects & Construction

Our teams are familiar with, and have worked on, virtually every primary and secondary plant system in both outage and non-outage environments, routinely executing critical and near-critical path work scopes.

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Welding Services

Our experienced, highly qualified welders perform everything from large turn-key projects to small emergent scopes for nuclear and fossil utilities nationwide.

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Flexible execution strategies include site-based teams, in-plant staff augmentation and seconded personnel, and office-based project execution.

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Valve Services

Our full-scope capabilities are an integrated approach, including valve and operator testing, repair, and refurbishment.

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From scaffolding design to decontamination and storage, our planning and implementation process is designed to reduce or consolidate scaffold use.

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Success Stories

ND Paper Operating Building


D&Z's safely completes new building erection at West Virginia paper mill

Our team provided engineering, procurement, and construction services to successfully complete a 22,500-square-foot multi-level operating building at a West Virginia paper mill for a confidential client.

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Large U.S. chemical production plant chooses D&Z to convert their industrial boilers to meet EPA guidelines

With critical schedule constraints to convert their coal-fired industrial boilers to meet EPA guidelines, our client selected Day & Zimmermann as its contractor – continuing a 30-year relationship at their North American sites.

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D&Z increases engineering productivity while reducing costs

Day & Zimmermann (D&Z) was awarded engineering work at a specialty chemical manufacturing company. We provided preliminary P&IDs, piping and valve specifications, and electrical and instrumentation design in the following areas.

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