Mission-Critical Mechanical Engineer -HPCC ??Spartanburg, SC ??Direct Hire ??Competitive Base Bonus Comprehensive Benefits. Overview. GTN is seeking a Mission-Critical Mechanical Engineer to serve as a senior technical authority supporting mechanical infrastructure at a large-scale High-Performance Compute Center (HPCC) and its associated critical systems. This is a hands-on engineering role focused on operational excellence, system reliability, and continuous optimization within a high-availability environment. The engineer will provide deep technical expertise across cooling and HVAC infrastructure while partnering closely with Electrical, Controls, Energy, and Critical Infrastructure teams to maintain uninterrupted operations. The ideal candidate brings strong mission-critical experience, advanced mechanical systems knowledge, and the ability to operate confidently in live environments where uptime, safety, and procedural discipline are paramount. Key Responsibilities. Mechanical Sy...Mechanical Engineer, Mechanical, Reliability Engineer, Mechanic, Maintenance Engineer, Operations, Staffing