Mechanical Engineer – Generator & Fuel Systems

GrowTech Industries, LLC•Goodyear, AZ

10h•Onsite

About The Position

GTI Energy designs and manufactures complex modular systems supporting power generation platforms, modular data center infrastructure, energy storage, defense, and industrial markets. Operating in a high-mix, engineered-to-order environment, GTI delivers integrated generator systems, steel enclosures, fuel systems, and mission-critical modular infrastructure. Our engineering team works at the intersection of design and manufacturing, where technical decisions directly impact fabrication, assembly, field installation, and long-term product performance. GTI Energy is seeking a Mechanical Engineer to own the full mechanical design of generator systems from concept through production launch. This role is responsible for enclosure systems, base frames, fuel systems, airflow management, exhaust integration, and mechanical packaging into a manufacturable end product. The Mechanical Engineer will operate at the system level, not just component design. This role requires ownership of the physical product functioning as intended in real-world conditions while partnering cross-functionally with Electrical Engineering, Structural Engineering, Manufacturing, Supply Chain, Quality, and Operations. The ideal candidate combines strong mechanical design fundamentals with practical experience in tanks, fluid systems, thermal systems, sheet metal, weldments, and industrial equipment packaging.

Requirements

Bachelor’s degree in Mechanical Engineering or related engineering discipline
5–10+ years of mechanical engineering experience in generator systems, industrial equipment, mobile equipment, power systems, HVAC, tanks, fluid systems, or similar hardware environments
Experience designing weldments, sheet metal assemblies, mechanical packaging, and fabricated systems
Strong understanding of fuel systems, piping, pumps, filters, valves, and fluid hardware integration
Experience with thermal systems, airflow management, cooling systems, or heat rejection design
Proficiency with CAD tools such as SolidWorks, Inventor, Creo, or similar platform
Strong ability to solve practical engineering problems in manufacturing environments

Nice To Haves

Experience with diesel or natural gas generator systems
Familiarity with UL 142 fuel tank requirements or related fuel storage standards
Experience with modular data center power systems, standby power, or mission-critical infrastructure
Background in fabrication-heavy or contract manufacturing environments
Experience with FEA, CFD, or thermal modeling tools
Exposure to Lean Manufacturing, Continuous Improvement, or new product introduction (NPI) processes

Responsibilities

Own full mechanical design of generator systems from concept, prototype, validation, and production release
Develop integrated system layouts including enclosure, fuel systems, radiator systems, exhaust systems, service access, and structural packaging
Ensure designs support manufacturability, installation, serviceability, lifting, transport, and long-term durability
Operate as the primary mechanical owner of the complete generator product
Design generator enclosures, skid bases, and structural frames that align with fabrication and assembly capabilities
Develop layouts for component placement, maintenance access, airflow clearance, lifting points, and shipping requirements
Design weldments, sheet metal assemblies, and bolted mechanical structures for production readiness
Improve enclosure and frame designs to reduce rework, improve throughput, and enhance field installation success
Own fuel system design end-to-end including subbase tanks, belly tanks, day tanks, and associated fuel delivery systems
Design UL 142 compliant storage tanks including double-wall construction, leak detection, venting, fill systems, and containment features
Size fuel systems to meet runtime requirements, customer specifications, and application demands
Select pumps, filters, valves, sensors, level systems, and related hardware for reliable fuel system operation
Define and route all fuel piping, tubing, hoses, and mechanical connections throughout the system
Design for vibration resistance, thermal expansion, pressure integrity, and serviceability
Ensure long-term reliability of fluid systems through proper component selection and installation methods
Support troubleshooting of leaks, restrictions, pump issues, and field reliability concerns
Own generator airflow and thermal system performance including intake air, radiator integration, compartment cooling, and exhaust heat management
Design airflow paths to ensure operation at worst-case ambient conditions without derating or overheating
Evaluate fan performance, pressure drop, recirculation risks, and enclosure heat rejection
Support thermal validation through testing, instrumentation, and real-world performance analysis
Design exhaust routing, silencers, flex sections, and thermal shielding while maintaining acceptable backpressure limits
Coordinate packaging space and provisions for aftertreatment or emissions equipment where required
Ensure exhaust systems meet thermal, durability, and service access requirements
Drive manufacturable designs aligned with welding, fabrication, machining, paint, and final assembly capabilities
Work directly with shop personnel to resolve fit-up, tolerance, and production issues quickly
Improve designs based on production feedback to reduce labor hours, improve quality, and increase repeatability
Support BOM accuracy, drawing quality, revision control, and release discipline
Participate in prototype builds, heat runs, system validation, and production troubleshooting
Diagnose root causes of thermal, fuel, vibration, packaging, or durability issues and implement corrective actions
Support continuous improvement through Root Cause Analysis, 5 Whys, and Fishbone methodologies
Fix real-world issues through engineering ownership, not model-only updates
Partner with Electrical Engineering on controls, harness routing, battery systems, and integrated power components
Coordinate with Supply Chain on sourced components, lead times, and alternate part qualification
Support Quality and Operations teams during launch, production ramp, and field issue resolution
Participate in customer design reviews and technical discussions when required