So much of the discussion around the surge in data center has been about where they will go and how much energy they will use.
That talk is missing one key aspect: Who is going to make sure they run efficiently?
Joe Demark Jr. is President and Business Manager of Sheet Metal Workers Local 25, representing the skilled professionals who sketch, fabricate, install, and maintain the HVAC and air-handling systems that make the modern world function.
As Northern New Jersey sees a surge in data center construction, Demark and his members are making sure that this once-in-a-generation infrastructure buildout is done safely, efficiently and with the highest level of craftsmanship.
Simply put, they have to. Data Center work requires unique dedication, Demark said.
“The margin for error is zero,” he said. “Data centers run 24/7 and rely on tight environmental controls — airflow, temperature, filtration — down to the decimal. What we do as sheet metal workers is mission critical. Everything must be done with precision, and it has to last.”
Demark said Local 25 can play a key part in their success.
“This isn’t work that can be slapped together by people who lack training and experience on complex projects,” he said. “These systems can’t fail.”
BINJE recently sat down with Demark to talk about Local 25’s role in the digital infrastructure boom — and why training and experience matter more than ever on these complex, high-stakes projects.
Here’s a look at the conversation.
BINJE: What role is Local 25 playing in the data center boom?
Joe Demark Jr.: We’re building the systems that keep these centers running. Our members install the HVAC, ductwork, custom fittings and specialty systems that manage airflow and protect sensitive equipment. It’s not just about temperature — it’s about airflow consistency, filtration and reliability. And we’re proud to say: no one trains for this work like we do.
BINJE: Why is training such a focus for Local 25?
JD: Because training is safety. Training is quality. And training is how we hand it down from one generation to the next. Our apprentices spend years learning the technical skills and safety protocols it takes to do this work right. When a data center developer hires union labor, they’re getting professionals who are certified, experienced, and built to meet the demands of these highly sensitive projects.
BINJE: What should developers and contractors understand about union labor in this space?
JD: You’re not just getting a workforce—you’re getting a trained, reliable team. These aren’t people learning on the job. They’ve already learned, and they’re constantly updating their skills. Our work is done right the first time, on schedule, with a long-term view. That makes us a value-add, not a line item.
BINJE: What does this work mean for the members of Local 25?
JD: It’s a point of pride. Our members know they’re helping build the future. Whether it’s tech, healthcare, or clean energy, so much of it depends on well-functioning air systems. Our members are part of that. We take that responsibility seriously.
BINJE: Where do you see all this going over the next few years?
JD: The demand for data centers is only increasing. The need for skilled tradespeople is only increasing. We’re going to keep expanding our training, growing our workforce and showing developers what union labor can do.
We’re ready — and we’re just getting started.
BINJE: Last question. And a little off topic. We’re in the thick of graduation season. What’s your message to high school graduates right now?
JD: If college isn’t your thing — or even if it is — look at the trades. Our apprenticeship program lets you earn while you learn. No student loans, no four-year tuition bill, and you finish with a skillset that’s in demand for life. And you’re not just getting a job.
Joe Demark with an apprentice in their Carlstadt training center.
