Seemingly every Big Tech company is trying to put a data center in your backyard to fuel their AI ambitions.

The biggest roadblock to that actually happening: Finding the skilled humans, such as welders and electricians, to build a state-of-the-art facility that will suck massive amounts of power from the electrical grid so we all can create AI-generated videos.

The US MEP (mechanical, electrical, and plumbing trades) labor pool is smaller than the 1.8 million headline labor force suggests, Bernstein analyst Chad Dillard warned in a new note on Wednesday.

"Not all MEP workers are qualified, geographically accessible or available," Dillard explained. "Data center work requires a specialized set of skills, so even after narrowing this pool to \[non-residential\] construction (790,000), the pool needs further refinement given the high training bar. There is a geographic mismatch between where the data center projects will be built vs. where the labor is — only 30% of the MEP labor resides where 70% of the projects are located."

"Data centers must compete with the labor needs of other construction projects," Dillard added. "Tradespeople can't be manufactured, so labor recruitment rates will set the construction pace."

At recent peak recruitment rates, the US has added approximately 15,000 mechanical, 30,000 electrical, and 15,000 plumbing craft laborers, Dillard estimated.

"In reality, this recruitment rate likely represents a ceiling," Dillard said. "1) MEP recruitment rates have slowed since the 2023 peak; 2) MEP as a share of the total US labor pool is at a 20-year-high; 3) only craft labor can make craft labor — training is the true bottleneck."

Here's the biggest risk to America's data center building boom.