Senior Engineer - Battery Energy Storage Systems (BESS)
Posted on: 17 Jul 2025
WESTMINSTER, TX
Job Description
What You Can Expect
As a Battery Energy Storage Systems (BESS) Senior Engineer within Renewables Flex Power Business Unit (RFGBU) in North America, you will play a key role in developing advanced battery energy storage solutions, with a focus on lithium-ion technologies. You’ll collaborate with Subject Matter Experts (SMEs) to define system requirements, design battery systems, specify components, and support both business development and operations teams.
Your responsibilities will span the full project lifecycle—from initial design and sizing through development, installation, commissioning, and operation. You’ll generate detailed bills of materials for cost evaluation and serve as the primary engineering interface for EPC partners, ensuring technical excellence throughout project execution.
What You Will Do:
Lead the design and development of lithium-ion Battery Energy Storage Systems (BESS), including system sizing, layout, and component specification, in collaboration with Subject Matter Experts (SMEs)
Oversee all technical aspects of project execution—from design through commissioning and operation—serving as the primary engineering interface for EPC partners and Owner’s Engineers
Support business development by identifying technical requirements, engaging with utilities and Authorities Having Jurisdiction (AHJs), and contributing to proposals and cost evaluations
Review and ensure compliance with system designs and drawings with ENGIE standards, NEC, IEEE, and other applicable codes and regulations
Independently lead and collaborate with project teams to deliver high-quality electrical engineering, including oversight of consultants and contractors, ensuring compliance with company policies, safety standards, interconnection agreements, and overall project objectives
Generate and update site layouts, grading and stormwater plans, single?line and utility diagrams, and incorporate external survey, geotechnical, and consultant drawings—maintaining company CAD standards
Support Operations & Maintenance (O&M) teams through training, troubleshooting, and staying current on emerging technologies, industry standards, and regulatory changes
What You’ll Bring
Minimum of a Bachelor's Degree in Electrical or Mechanical Engineering or related field
At least five (5) years of experience in renewable systems engineering, with a focus on battery energy storage
Extensive technical expertise in battery energy storage systems (BESS), including inverters, transformers, substations, protection and controls, battery management and energy management systems
Proven experience managing projects across the full lifecycle—from design through commissioning—while collaborating with EPCs, SMEs, and O&M teams
Analytical and problem-solving skills applied to complex BESS challenges, including system integration and performance optimization
Proficiency in creating, reading, and interpreting construction plans and technical specifications
Advanced AutoCAD Civil?3D experience to create and revise full civil drawing sets for utility?scale BESS sites
Excellent communication skills and the ability to engage effectively with internal stakeholders, utilities, and regulatory authorities
Additional Details
This role is eligible for our hybrid work policy
Must be available to travel domestically up to 30% of the time and with the need for some overnight trips
Must be willing and able to comply with all ENGIE ethics and safety policies
ENGIE
Houston, TX
ENGIE North America offers a range of capabilities in the United States and Canada to help customers decarbonize, decentralize, and digitalize their operations. These include comprehensive services to help customers run their facilities more efficiently and optimize energy and other resource use and expense; clean power generation; energy storage; and retail energy supply that includes renewable, demand response, and on-bill financing options. Nearly 100 percent of the company’s power generation portfolio is low carbon or renewable. In 2018, ENGIE recorded €60.6 billion in global revenues ($71.3 billion USD). More than 6,000 employees work in the region, and Houston serves as corporate headquarters. About the businesses:
Retail Electricity
ENGIE is one of the largest non-residential retail electricity suppliers in the United States and currently serves commercial, industrial, and institutional customers in 14 markets. Supplying energy to nearly 50 percent of Fortune 100 companies, ENGIE serves over 89,000 accounts, with an estimated peak load totaling nearly 13,000 MW. The company also offers electricity service to residential and small business customers in 12 U.S. markets under the brand Think Energy®.
Energy Services
Through the integrated facility management and commitment to energy performance improvement of customer facilities, ENGIE offers integrated management solutions—including on-site solar, battery and cogeneration design and installation—that enable clients to focus on their business. The company is a recognized leader in the operation and maintenance of infrastructure including airports, office buildings and industrial sites, as well as a wide range of technical infrastructure. In managing energy expenses and usage, ENGIE has identified more than $4.1 billion in savings for multi-site clients over the last three years and, in working with utilities, delivered nearly $15.4 billion in energy savings for consumers in the last 12 years.
Power Generation
In the United States and Canada, ENGIE owns and/or operates cogeneration, steam, and chilled water facilities, including more than 1,000 MW in the portfolio produced by combined heat and power (CHP) units located within commercial or industrial facilities and using waste heat from an onsite generation system to provide for heating and chilling needs. The North America renewables portfolio consists of wind, solar, and biomass/biogas assets, with a capacity of more than 1,200 MW in operation and another 2,300 MW under construction.
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IndustryEnergy/Utilities
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No. of Employees6000+
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Website
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Jobs Posted186
