Microsoft opens its first Mount Pleasant facility and keeps building next door

Microsoft's first Mount Pleasant data center facility is operating, and construction continues on a second facility next door. The company announced the first completion on June 23, after equipment startup activities in April.

That changes the local labor picture. Some workers have completed a construction assignment. Other crews are building the next phase. Operations employees have a different job again.

The workforce numbers describe different things

Microsoft's June report says nearly 10,000 construction workers contributed to the first facility over two years. That is cumulative participation. It does not mean 10,000 people were on site each day.

The same report identifies nearly 550 full-time employees supporting the first facility. Microsoft and its contractors were actively hiring at the time of the announcement. That statement needs a current job listing before it becomes an October vacancy claim.

The adjacent second facility was undergoing foundation installation, steel erection and underground utility work. Microsoft targets completion in 2028. It expects around 800 full-time employees in the village once that facility is operating, with additional employment from expansion to the north.

For an electrical contractor, the next facility's construction schedule is the relevant lead. The current operations headcount does not establish a need for another installation crew.

The daily peak was smaller than the cumulative total

Microsoft's September 2025 account reported more than 3,000 workers at peak daily activity. It named electricians, plumbers and pipefitters, carpenters, ironworkers, concrete workers and earth movers among the trades.

That earlier number helps explain the June total. A large project can cycle through many more workers than it employs on a peak day. Neither figure is a count of open jobs now.

A foreman leaving one phase may be a candidate for the next. A contractor trying to retain that foreman needs the actual competing offer, start date and duration. County-wide hiring pressure cannot be calculated from a cumulative worker count alone.

Site preparation continued after the first opening

The July construction update planned soil hauling within the site starting around July 13 for roughly eight weeks, subject to weather, permitting and scheduling. It warned neighbors about increased truck traffic, stockpiles and construction activity.

The update names Walsh Construction as the contact for that work. Older entries on the same page also name Kiewit for a separate area. Those dated references are a reason to identify the exact area and phase when seeking a subcontract. They do not establish a single buyer for every current or future building.

For crews, a campus with both operating and construction areas requires a clear field boundary. Know which access route, laydown space and utility systems belong to the assignment. Do not carry an earlier phase's instructions into the next job without checking them.

Cooling and power still matter after turnover

Microsoft's 2025 design account said more than 90 percent of the first facility would use closed-loop liquid cooling, filled during construction and continuously recirculated. The remaining portion would use outside air, with water used on the hottest days.

That describes a design approach. It is not a measured water total for every Mount Pleasant phase. It also leaves substantial coordination between electrical, controls, cooling and equipment teams. A contractor needs the issued scope and acceptance tests for the area being built.

Microsoft also described prepayment for energy and electrical infrastructure. Cost-allocation commitments should be checked against actual utility agreements when assessing a later expansion. A company's commitment is different evidence from an approved tariff or completed utility project.

Local suppliers and future work

The June announcement forecasts $4.7 billion of local Wisconsin hyperscale construction spending between 2024 and 2028. It reports direct purchases from 29 businesses in 11 Wisconsin counties, including electrical equipment manufacturers. The spending forecast covers a period and region; it is not the value of a single unawarded contract.

For contractors, this project offers a confirmed first opening, active work on the next facility and named construction contacts tied to dated updates. The practical step is to obtain the remaining procurement and labor schedule for a specific phase.

Workers comparing a job should separate hourly wage, benefits, travel and expected duration. The Wisconsin electrician pay report provides a state comparison point. It does not replace the terms of a site offer.