Application Engineer - Data Center

Based in Durham, N.C., Flex Gen is an innovative software and services provider in the global energy storage sector. At the forefront of the energy transition, Flex Gen leverages decades of engineering and software expertise to help shape the future of sustainable power both in the United States and globally. Flex Gen's HybridOS™ software seamlessly integrates with any hardware vendor and with both traditional and renewable power sources.

Our advanced analytics and AI‑driven insights enable energy storage owners to effectively deploy diverse power market strategies and integrate various generation forms, enhancing grid stability and increasing economic returns. With 1.5M hours of runtime and 8 GWh of energy storage systems managed with HybridOS™, Flex Gen provides field‑tested software and service solutions that are trusted by the most technically and commercially demanding developers, utilities, government agencies, and industrial companies in the world.

Flex Gen is seeking an Energy Storage Application Engineer to support the development and delivery of cutting‑edge energy storage projects. In this role, you will partner with our Business Development and Technical Support teams to provide pre‑sales engineering, system design guidance, and technical expertise for Energy Storage Systems and Flex Gen’s Energy Management System (EMS), HybridOS.

You will act as a trusted technical advisor in customer engagements—bridging hardware, software, and market applications—to ensure Flex Gen delivers solutions that meet both technical and commercial needs. From project development and opportunity evaluation through contract execution, you will help drive adoption of Flex Gen’s industry‑leading EMS and BESS solutions.

• Support preliminary ESS design, system sizing, and power system analysis.
• Provide technical guidance on energy storage solutions during project development and pre‑sales phases.
• Collaborate with system engineering and software engineering teams to ensure accurate technical solutions.
• Partner with the Sales and Business Development teams to position HybridOS™ EMS and ESS solutions for new opportunities.
• Partner with Business Operations team to prepare and deliver technical presentations and proposals highlighting EMS and BESS capabilities, system performance, and integration benefits.
• Serve as a subject matter expert in customer meetings, demonstrating the value of Flex Gen’s EMS and BESS solutions.
• Serve as a technical point of contact for customers, supporting system design, interconnection requirements, and market‑specific considerations.
• Partner with the Business Development team to identify strategic opportunities and provide technical input for proposals.
• Contribute to project estimations and cost modeling for ESS projects.

• Assist in contract negotiations by ensuring technical requirements are accurately reflected in agreements.
• Provide clear technical documentation and responses to customer inquiries during proposal and contracting stages.

• Utilize AI‑driven tools and workflows to streamline processes, automate tasks, and improve overall performance.
• Associate degree in Engineering or equivalent relevant experience.
• Strong technical aptitude in electrical or power systems engineering.
• Excellent listening, communication, and customer engagement skills.
• Ability to manage multiple priorities and remain professional under pressure.
• High proficiency in Microsoft Excel.
• Valid driver’s license and willingness to travel.
• Ability to pass background and toxicology screening.

• Bachelor’s degree in Electrical, Mechanical, or Power Systems Engineering.
• Professional certification or license (e.g., EIT, PE, PMP).
• Experience with AutoCAD, PowerBI, Visual Basic, Microsoft PowerPoint.
• Prior experience in energy storage, renewable energy, or utility‑scale power projects.
• Familiarity with grid interconnection requirements and utility/ISO processes.
• Exposure to contract negotiation or technical sales engineering.

Flex Gen provides equal employment opportunities (EEO) to all employees and applicants for…