Principal Mechanical Engineer


Johnson Service Group (JSG) is actively searching for a Principal Mechanical Engineer for our client’s operation near Denver, CO. This is a long-term contract position with competitive pay. This is a fantastic opportunity to work on a state-of-the-art project.



The Principal Mechanical Engineer is a senior technical leader responsible for the design, specification, and delivery of mechanical systems within EPC (Engineering, Procurement, and Construction) projects. This role focuses heavily on rotating equipment, pressure vessels, and other major mechanical equipment, ensuring designs meet project requirements, industry standards, and client expectations. The position also plays a key role in cross-functional coordination.

Key Responsibilities

Lead the mechanical engineering scope for EPC projects from concept through execution

Design, specify, and review rotating equipment (pumps...