Green Bay sits inside one of the densest dairy and meat processing concentrations in the Midwest, which means the refrigeration work here is ammonia plant work, not storefront service. Schreiber Foods and Associated Milk Producers run continuous ammonia systems in their cheese and dairy plants, so PSM compliance and ammonia safety are part of the job, not an add-on. Wisconsin's statewide average for refrigeration technicians, mechanics, and engineers is $65,000 a year, mid-pack nationally; see the 2026 state salary ranking for where that lands.
Large cheese and dairy processing running continuous ammonia refrigeration, headquartered in Green Bay.
Cooperative dairy processing with ammonia systems that run around the clock, so shift coverage is standard.
Refrigerated warehousing, plant-side tech roles rather than a service truck and a route.
National cold chain operator staffing facility techs for continuous warehouse coverage.
The processing corridor runs south and east from the city. De Pere and Appleton carry the most postings after Green Bay itself, with Sheboygan, Manitowoc, and Oshkosh adding volume down the lakeshore. A tech living here can realistically commute to two or three plants.
Wisconsin's statewide average across technicians, mechanics, and engineers is $65,000 a year. Ammonia plant roles at Schreiber and AMP carry shift differential and on-call on top of base, because a dairy plant does not shut down at 5pm.
It is the dominant system type in Green Bay's dairy and meat plants, and RETA certifications like CARO and CIRO are how operators verify you can run one. The RETA certification guide covers which level to chase first. EPA 608 is federal law regardless.
Food plants hire maintenance techs and operators off the floor and train them onto the refrigeration side, which is a faster door than a contractor hiring a green service tech. See refrigeration jobs at food manufacturing plants for how those roles are structured.