Senior Mechanical Engineer - Battery Energy Storage Systems

Position Summary:

GTI is seeking a Senior Mechanical Engineer to lead the mechanical design of Battery Energy Storage System enclosures and integrated platforms. This role is responsible for developing manufacturable steel structures, equipment layouts, thermal management strategies, and serviceable enclosure designs supporting high-power battery and inverter equipment.

The ideal candidate will have experience designing industrial equipment enclosures, structural steel assemblies, thermal management systems, and modular infrastructure platforms within fabrication-driven manufacturing environments.

Key Responsibilities

Mechanical Design & System Packaging

• Design steel enclosures and structural platforms housing battery cabinets, PCS inverters, transformers, and electrical distribution equipment

• Develop equipment layouts supporting service access, ventilation, thermal separation, and cable routing zones

• Design modular steel assemblies, sheet metal components, structural weldments, and integrated equipment platforms using SolidWorks

• Coordinate mechanical packaging and enclosure design activities supporting modular BESS integration

Structural, Thermal & CFD Analysis

• Perform structural analysis and FEA on welded assemblies, lifting structures, anchoring systems, and transport frames

• Perform CFD and thermal analysis supporting battery cooling, HVAC airflow, and heat rejection within enclosed systems

• Support thermal management strategies for high-power electrical equipment operating within compact enclosure environments

• Evaluate structural integrity, airflow performance, and manufacturability throughout product development activities

Cross-Functional Integration

• Collaborate with Electrical Engineering teams to coordinate penetrations, cable trays, grounding provisions, equipment spacing, and integration requirements

• Coordinate with Manufacturing, Quality, and Integration teams to ensure designs support fabrication, assembly, welding, and field installation requirements

• Apply Design for Manufacturing (DFM) principles supporting efficient production and integration workflows

• Support prototype builds, factory integration activities, and NPI phase gate reviews

Compliance, Testing & Production Support

• Ensure designs support UL 9540 energy storage system certification requirements and thermal event mitigation strategies

• Support root cause analysis and corrective actions related to mechanical issues identified during testing, integration, or production

• Participate in design reviews, prototype evaluations, and production launch activities

• Support standardization of enclosure architectures, structural design practices, and modular packaging strategies across BESS product lines

Technical Leadership

• • Mentor CAD technicians and junior engineers on enclosure design, modular packaging strategies, and design best practices

  • Support development of engineering documentation, design standards, and manufacturing release packages

  • Provide technical guidance throughout design, fabrication, integration, and production activities

Requirements

Required Qualifications

Bachelor’s degree in Mechanical Engineering

7+ years of experience designing industrial equipment, energy systems, or modular infrastructure

Strong SolidWorks experience including weldments, sheet metal, and large assemblies

Experience with structural steel design, thermal analysis, and HVAC packaging

Experience supporting high-power electrical equipment packaging or industrial enclosures

Strong knowledge of engineering documentation, BOM development, and revision control

Preferred Qualifications

Experience designing battery energy storage systems or power conversion equipment

Familiarity with UL 9540, UL 9540A, and NFPA 855 frameworks

Experience designing modular or