Senior BESS Product Safety Engineer

The AES Corporation seeks a Senior BESS Product Safety Engineer for its Louisville, CO office. As a core technical authority for battery energy storage system (BESS) safety architecture, you will ensure systems are designed, tested, and deployed in compliance with fire codes and safety standards. This role involves approximately 30% travel, primarily supporting operational projects across the U.S. and potential international locations.

Responsibilities

• Interpret and apply NFPA, IFC, UL, and IEC standards to guide BESS product development and embed safety requirements throughout the design lifecycle
• Review and approve mechanical drawings, layouts, CAD models, and mechanization diagrams
• Own safety-critical BESS enclosure design and requirements, providing technical oversight through prototype builds, factory acceptance testing, and design qualification to mitigate thermal runaway, explosion, and overall safety risks
• Provide technical oversight of UL 9540 / 9540A testing, fire and explosion modeling (FLACS, Ansys, FDS, or similar tools), plume and gas dispersion analyses, and fire safety code requirement evaluation
• Develop and maintain fire code compliance matrices and AHJ-specific permitting documentation
• Interface with Authorities Having Jurisdiction (AHJs), third-party engineers, and certification bodies throughout permitting and approval processes
• Provide technical guidance and training to internal teams, customers, and first responders
• Lead development of emergency response documentation and safety packages for project permitting submittals and maintain Technical Data Packages
• Engage in industry consortiums and Technical Committees on BESS codes and standards; monitor and contribute to NFPA 855 and UL 9540 / 9540A revision cycles
• Mentor junior engineers and contribute to continuous improvement of BESS integration practices

Requirements

• Bachelor's degree in Electrical Engineering, Mechanical Engineering, Fire Protection Engineering, or related discipline
• 5–7 years of hands-on experience in mechanical design and fire protection for energy, industrial, or safety-critical systems
• Working knowledge of BESS fire codes and standards, including UL 9540 / 9540A, NFPA 68 / 69, NFPA 72, NFPA 855, and NFPA 110/111
• Experience supporting permitting, testing, and regulatory approval processes
• Proficiency with mechanical CAD tools (SolidWorks, AutoCAD, or equivalent)
• Ability to travel approximately 30% within the U.S. and internationally as needed

Preferred Qualifications

• Master's degree in Electrical, Mechanical, or Fire Protection Engineering
• Direct experience with utility-scale BESS
• Experience working directly with AHJs and third-party fire engineers
• Participation in standards organizations (NFPA, UL, IEEE)
• Experience with fire modeling tools such as FLACS, Ansys, or FDS

Benefits

• Medical, dental, and vision coverage
• Life insurance
• 401(k) eligibility
• Paid time off (vacation, sick leave, and parental leave)
• Annual bonus eligibility
• Salary range: $113,000–$141,525/year (based on experience, skills, and market location)