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Senior Principal Battery Systems Engineer

BAE Systems

Endicott, NY · Posted October 23, 2026

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About the job

Job Description Unlock Your Potential as a Propulsion Battery Systems Engineer at BAE Systems

Join our team of innovators and game-changers in the aerospace and defense industry! As a Propulsion Battery Systems Engineer at BAE Systems, you'll have the opportunity to design and develop cutting-edge propulsion battery systems for conventional aircraft, helicopters, and Advanced Air Mobility vehicles.

Be Part of a Legacy of Excellence

At BAE Systems, we're pushing the boundaries of what's possible in the aerospace and defense industry. Our Controls and Avionics Solutions (CAS) team is a leader in safety-critical aerospace electronics and high-power electric drive systems for commercial transit. Now, we're expanding our expertise to develop energy storage solutions for electrically powered aircraft.

Your Role: As a Propulsion Battery Systems Engineer, you'll be responsible for:

Developing, allocating, and managing complex system, hardware, and software requirements

Researching and developing complex, safety-critical, high-power battery system designs and architectures

Defining hardware, software, and programmable logic interfaces and functionality

Preparing and reviewing documentation for system designs and architectures

Performing system and/or product integration

Verifying and validating complex aspects of system designs to ensure conformance with functional specifications and customer requirements

What We Offer: Competitive pay and benefits package

Opportunities for professional growth and development in a collaborative and innovative work environment

Every other Friday Off, Flextime, and Telecommuting options for work-life balance

Culture of recognition for the extraordinary contributions of our skilled employees

Access to cutting-edge technology and resources

Collaborative team environment with opportunities to work on high-profile projects

Who We're Looking For: Highly motivated and experienced engineers with a passion for developing innovative solutions

Collaborative team players with strong communication skills

Customer-oriented individuals who anticipate customer needs and exceed expectations

Innovative thinkers who are always looking for ways to improve processes and outcomes

Required Education, Experience, & Skills B.S. in Systems Engineering, Electrical Engineering, Mechanical Engineering, or a related field (minimum)

8 years of experience designing, architecting, and integrating battery systems, especially for high-power or safety-critical applications

Demonstrated experience integrating battery systems into vehicles or high-level power system architectures

Experience in full lifecycle development, including system requirements, design, system-level integration, validation, and verification

Technical writing skills and ability to create required engineering documentation

Demonstrated experience providing technical leadership

Experience in developing and architecting SOC, SOP, SOH and SOE models and validating them at model level.

Knowledge of high-voltage electrical power system design, battery management system designs, and thermal management of energy storage systems

Preferred Education, Experience, & Skills Master's Degree in a related engineering field

Experience with development of formal validation and verification procedures

Knowledgeable of commercial and military certification objectives and activities

Working knowledge of model-based development of systems and/or software

Demonstrated experience testing batteries and power systems

Demonstrated experience with deploying battery systems for safety-critical applications

Knowledge of ARP-4754A and ARP-4761, DO-311A, and FAA TSO process

Pay Information Full-Time Salary Range: $120874 - $205486

Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience.

Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20+ hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics. About BAE Systems, Inc. BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply, and protect those who protect us. As one of the most geographically diverse international defense companies, we deliver a full range of products and services spanning air, land, maritime, space, and cyber, including advanced electronics, intelligence solutions, and dedicated customer support.

Our culture is performance-driven and values-led, built on curiosity, creativity, and collaboration. Purpose isn't a tagline here. It's what drives us. We're developing breakthrough technologies that defend national security and make a lasting impact on our communities and our planet. When you join BAE Systems, you're not just building a career. You're contributing to a mission that truly matters.

This position will be posted for at least 5 calendar days. The posting will remain active until the position is filled, or a qualified pool of candidates is identified.