FENECON USA is seeking a Mechanical Engineer II to own key mechanical design and system integration workstreams across our Battery Energy Storage System (BESS) product line. You will develop mechanical designs, drive prototype and production improvements, manage interfaces across electrical and thermal subsystems, and support validation, certification, installation, and commissioning. The role is intended for an engineer who can work with meaningful autonomy while collaborating with manufacturing, suppliers, project teams, and FENECON's broader engineering organization.

•  Own mechanical design and integration of BESS enclosures, battery/rack interfaces, thermal-management/HVAC components, service access, cable-routing interfaces, and safety-system packaging 

•  Develop and maintain 3D CAD models, assemblies, production drawings, and revision-controlled design documentation using SolidWorks or similar tools 

•  Define mechanical interfaces and apply GD&T, tolerance analysis, material selection, fastener design, and practical calculations for robust fit, function, serviceability, and manufacturability 

•  Own or coordinate BOMs, drawing packages, engineering changes, and release documentation for prototype and production builds 

•  Drive DFM/DFA and industrialization with production and fabrication partners, including assembly improvements, tooling/fixture needs, quality issues, and production troubleshooting 

•  Lead mechanical support for prototype and pilot builds, resolve fit/integration issues, and drive root-cause analysis and corrective design actions based on build or field feedback 

•  Lead or coordinate mechanical and system-level validation such as thermal, vibration, transport, ingress-protection, lifting/handling, and functional testing as applicable 

•  Collaborate with electrical, controls, compliance, and project teams to manage cross-functional interfaces and cohesive BESS system integration 

•  Manage technical coordination with fabrication partners and component suppliers, including specifications, design reviews, manufacturability, and issue resolution 

•  Support mechanical aspects of BESS certification and compliance, including UL/NFPA, NEMA/IEC enclosure, structural, lifting, and transport/shipping requirements as applicable 

•  Support field-installation and commissioning where mechanical integration, site interfaces, lifting/handling, service access, or equipment placement require engineering input 

•  Maintain specifications, test/QC procedures, assembly documentation, and standard work; help establish repeatable mechanical design and industrialization standards 

•  Travel domestically as needed for prototype work, supplier visits, installation support, commissioning, or customer visits 

•  Bachelor's degree in Mechanical Engineering, Mechatronics, or a closely related field 

•  3–5 years of relevant mechanical-engineering experience; ideally with industrial equipment, sheet metal design/fabrication, energy storage, power electronics packaging, automotive, or other complex electromechanical products 

•  Strong 3D CAD capability and experience owning mechanical designs, assemblies, and production drawings; SolidWorks experience preferred 

•  Working knowledge of GD&T, tolerance analysis, material selection, fasteners, and processes such as sheet metal, machining, and welded fabrication 

•  Experience applying DFM/DFA principles and supporting prototype or production builds through design changes and issue resolution 

•  Ability to translate system requirements into practical designs while balancing performance, cost, manufacturability, serviceability, and schedule 

•  Experience with cross-functional system integration and structured troubleshooting/root-cause analysis in hardware development or manufacturing 

•  Strong communication skills and ability to work with meaningful autonomy across engineering, production, suppliers, and project/customer-facing teams 

•  Willingness to travel, including overnight trips, for prototype work, supplier visits, field installations, commissioning, or customer visits 

•  Direct experience with BESS, renewable energy, industrial enclosures, power-conversion equipment, or other outdoor electrical equipment 

•  Experience with thermal-management/HVAC integration, enclosure sealing, FEA, structural/thermal analysis, or related mechanical simulation methods 

•  Familiarity with requirements such as UL 9540, NFPA 855, NEMA/IEC enclosure ratings, or related safety standards 

•  Experience working with fabrication suppliers on sheet metal, weldments, coatings, machined parts, or production tooling 

•  Experience with validation testing, manufacturing quality, engineering-change control, or corrective-action systems 

•  Familiarity with modular equipment considerations such as lifting, shipping/CSC, seismic/wind loads, service access, and field installation 

•  Ability to work in both office/design and manufacturing/field environments 

•  Comfortable working around industrial equipment and high-voltage systems under proper safety protocols 

•  Ability to lift up to 25–50 lbs occasionally and work in outdoor/job site conditions as needed 

•  Standard PPE compliance for manufacturing floor and field site visits 

•  The opportunity to help build FENECON's U.S. engineering and manufacturing operation while being backed by an established international energy-storage company 

•  High ownership and real influence over mechanical design standards, DFM, and industrialization as the product line scales 

•  Direct exposure to the full BESS lifecycle: design and integration, prototyping, manufacturing, testing, certification, commissioning, and deployment 

•  Work on complete energy-storage products integrating enclosure, battery, thermal, electrical, safety, and energy-management systems 

•  Cross-functional and international collaboration, with a path toward senior/lead engineering responsibility as the U.S. organization expands 

•  15 days of PTO to start with an additional day added each year up to 5 additional days 

•  9 Paid Holidays + company-wide paid winter shutdown 

•  Medical, Dental, + Vision insurance 

•  Short Term Disability 

•  Basic Life + AD&D 

•  401k; 100% match up to 3%, and 50% match from 3–5% 

Interested candidates are invited to apply by sending their updated resume to careers@fenecon.com

Please include the position title in the subject line of your email.

Subject: Application – [Job Title]

Please make sure your resume includes your relevant education, experience, skills, and contact information.

FENECON USA is seeking an Electrical Engineer II to take ownership of key electrical-design and system-integration workstreams across our Battery Energy Storage System (BESS) product line. You will help translate product requirements into robust electrical designs, support industrialization and manufacturing, lead technical work during installation and commissioning, and contribute to system-level validation and certification readiness. This role is intended for an engineer who can work with meaningful autonomy while collaborating closely with project management, manufacturing, suppliers, customer-facing teams, and FENECON's broader engineering organization.

•  Own electrical design and system integration across batteries, PCS/inverters, BMS/FEMS, auxiliary power, thermal management, and safety-system interfaces 

•   Develop and independently maintain electrical schematics, design documentation, and revision control for the U.S. BESS platform 

•   Develop and review electrical single-line diagrams (SLDs) for BESS installations, including multi-unit or hybrid configurations, and coordinate PE-reviewed/stamped packages where required 

•   Apply strong three-phase power-system knowledge to system design, protection concepts, troubleshooting, and technical decision-making 

•  Perform and review electrical calculations including load calculations, wire/conduit sizing, SCCR, grounding, voltage drop, protection coordination, and arc-flash inputs as applicable   

•   Drive BESS manufacturing electrical support, including production-issue resolution, DFM input, quality improvements, and implementation of corrective actions 

•  Lead or coordinate system-level electrical testing, validation, and certification-support activities, including development of test/QC procedures and technical evidence   

•   Lead field-installation planning and technical coordination with Project Managers, including site-readiness reviews and installation sequencing 

•   Lead or support commissioning and startup activities and troubleshoot complex field issues through structured root-cause analysis 

•   Support grid-interconnection documentation and coordination with utilities/AHJs, including technical inputs to studies and application packages

•   Serve as a technical resource for project, sales, and customer-support teams during technical scoping, proposals, deployments, and escalated issues 

•   Manage technical coordination with fabrication partners and component vendors, including specifications, design reviews, and issue resolution 

•   Ensure designs and technical documentation align with applicable requirements and standards such as NEC, UL 9540, UL 1741 SA/SB, UL 508A, and IEEE 1584, and support audits/certification activities 

•    Help establish internal engineering standards, templates, and repeatable processes; mentor junior engineers where appropriate to experience 

•   Travel domestically as needed for installation support, commissioning, supplier visits, or customer visits   

• Bachelor's degree in Electrical Engineering or a closely related field

•  3–5 years of relevant electrical-engineering experience, ideally in battery energy storage, power electronics, renewable energy, or industrial/utility-scale power systems

•  Strong working knowledge of three-phase power systems, including protection and coordination concepts

•  Demonstrated ability to create and own electrical schematics and single-line diagrams with limited supervision

•  Proficiency with electrical CAD/design software such as EPLAN, SolidWorks Electrical, AutoCAD Electrical, or similar

•  Experience performing electrical calculations and translating system requirements into practical electrical designs

•  Working familiarity with relevant codes and standards such as NEC, UL 9540, UL 1741, UL 508A, and IEEE 1584

•  Strong communication skills and demonstrated ability to work with meaningful autonomy, prioritize technical work, and coordinate across internal and external stakeholders

•  Willingness to travel, including overnight trips, for field installations, commissioning, supplier visits, or customer visits  

•  Direct experience with BESS, renewable energy, power conversion systems, or grid-scale power systems

•  Experience with grid-interconnection studies, utility coordination, or AHJ review processes

•  Familiarity with PLCs, SCADA, BMS (Battery Management System), and EMS (Energy Management System) architecture

•  Experience with manufacturing operations, DFM, production troubleshooting, and corrective-action processes

•  Experience with system-level testing, commissioning, certification support, or validation of complex electrical equipment

•  EIT certification or active progress toward/holding a PE license (not required, just preferred)  

•  Ability to work in both office/design and manufacturing/field environments  

•  Comfortable working around industrial equipment and high-voltage systems under proper safety protocols 

•  Ability to lift up to 25–50 lbs occasionally and work in outdoor/job site conditions as needed 

•  Standard PPE compliance for manufacturing floor and field site visits 

•  The opportunity to help build FENECON's U.S. engineering and manufacturing operation while being backed by an established international energy-storage company 

•  High ownership and real influence over electrical design standards, technical processes, and industrialization as the product line scales  

•  Direct exposure to the full BESS lifecycle: system architecture and integration, manufacturing, testing, certification, commissioning, and customer deployment

•  Work with integrated hardware and software energy-storage technology, including FENECON's FEMS energy management platform

•  Cross-functional and international collaboration, with a growth path toward senior/lead engineering responsibility as the U.S. organization expands

•  15 days of PTO to start with an additional day added each year up to 5 additional days  

•  9 Paid Holidays + company-wide paid winter shutdown

•  Medical, Dental, + Vision insurance 

•  Short Term Disability 

•  Basic Life + AD&D 

•  401k; 100% match up to 3%, and 50% match from 3–5% 

Interested candidates are invited to apply by sending their updated resume to careers@fenecon.com

Please include the position title in the subject line of your email.

Subject: Application – [Job Title]

Please make sure your resume includes your relevant education, experience, skills, and contact information.