Mechanical Engineer, Compressor

AtmosZero is building the next generation of industrial steam infrastructure. Our flagship product, Boiler 2.0, is a modular industrial steam heat pump designed to help manufacturers reduce operational risk, improve flexibility, and modernize steam generation over time. Rather than forcing facilities to choose between reliability and sustainability, AtmosZero enables a practical path toward future-ready steam systems that integrate with existing operations and scale with customer needs. AtmosZero · Loveland, Colorado (onsite) · Full-time · Engineer II/III or Senior Engineer IReports to: Vice President of Engineering Why this role exists Industrial steam runs manufacturing, and most of it still comes from combustion-based boilers. AtmosZero is developing Boiler 2.0, a modular industrial heat pump that produces steam from electricity and air. We are integrating first-of-a-kind compressor hardware into a 1 MW product while moving through procurement, fabrication, assembly, installation, and test. This role owns the mechanical details and interfaces that make the compressor package reliable, serviceable, and repeatable. Level and scope We are hiring into this role at whichever of three levels best matches the scope, independence, and judgment demonstrated through the interview process. Apply once and we will place you. Engineer II. Independently manage defined mechanical projects or portions of the product, turning established requirements into released designs and supporting hardware through fabrication, assembly, and test. Engineer III. Own significant subsystems or design work packages, manage interfaces and ambiguity, and deliver outcomes with limited supervision. Senior Engineer I. Lead complex mechanical initiatives through ambiguity, mentor teammates, and influence cross-functional decisions from architecture and trade studies through validation and production readiness. If you are between levels or arrived at this expertise through an unusual route, apply anyway.