Battery Systems Engineer

Our Mission At Vertical Aerospace, we are pioneering the way for electric aviation. The Valo, our eVTOL (electric, vertical, take-off and landing), 'zero emissions' aircraft will set a new safety standard for how we will navigate the sky. We won't realise our mission following the same legacy processes and traditions our predecessors followed, instead, we want to 'redefine' aerospace best practices. We are growing quickly from a prototype business to a scaling SME, and the next few years will be critical to our success and delivering on our ambitious goals. Valo is targeting airliner-level safety certification in 2029 ahead of entering service with our airline and operator customers. WHAT TO EXPECT As an Senior Cell Engineer, you'll play a key role in qualifying commercial lithium-ion cells for use in our next-generation electric aircraft. Working closely with engineers, technicians, suppliers and research partners, you'll generate the evidence needed to support safe, high-performance battery systems. WHAT YOU'LL DO * Developing qualification methods for commercial lithium-ion cells, covering electrochemistry, electrical testing and data analysis. * Designing test plans, communicating test requirements to engineers and technicians, and analysing and reporting results. * Developing and optimising data analysis tools for electrical, safety and materials test data, including statistical analysis. * Working with industrial and academic partners to plan and deliver cell testing and analysis activities. * Generating and managing cell requirements and supporting associated verification and validation activities through testing, modelling and analysis. * Supporting system-level requirement verification across the battery programme. * Supporting the management of cell suppliers and contributing to our cell sourcing strategy. * Contributing across the wider electrochemistry team, supporting performance, lifetime, safety, quality and future cell technology evaluation. WHAT YOU'LL BRING ESSENTIAL * Degree, MSc or PhD (or equivalent experience) in Electrochemistry, Chemical Engineering, Materials Science or a related discipline. * Strong understanding of lithium-ion cell electrochemistry, cell performance, degradation mechanisms and design trade-offs. * 1-2 years' experience working with commercial lithium-ion cells. * Experience designing and analysing lithium-ion electrical test programmes, including Design of Experiments (DoE). * Strong experience analysing lithium-ion cell data. * Good understanding of how lithium-ion cells integrate into larger battery systems. * Ability to work independently while collaborating effectively across multidisciplinary engineering teams. * Comfortable working in a fast-paced, evolving environment with changing priorities. * Strong analytical and problem-solving skills with a proactive, hands-on approach. DESIRABLE * Experience with requirements management or systems engineering (e.g. FMEA, FTA). * Familiarity with equivalent circuit models (ECM), thermal equivalent circuit models (TECM) or empirical lifetime modelling. * Experience qualifying lithium-ion cells for industrial applications such as electric vehicles or aerospace. * Experience handling large datasets and developing data analysis pipelines. * Hands-on experience with electrical cell testing, materials characterisation or cell forensic analysis. * Experience working with large-scale cell suppliers. * Aerospace industry experience. What can you expect from us? We're on a mission. Where others see limits, we see opportunity, and we work at pace. Working at Vertical isn't your average role but for those seeking a challenge, a flexible, supportive organisation and an incredible team; working here is an opportunity to do the best work of your career. Our approach promotes ingenuity and courage, while our environment builds success through diligence in safety and being open in the way we work. The only way we're going to assure the next chapter of aviation history is by working as a team, relentlessly, towards our goal.  Our benefits Our people matter - we're not going anywhere without them. Which is why our company benefits go beyond the essentials. * 26 days holiday, plus bank holiday * 5 extra days per year to buy (or sell) * 5 extra days holiday when you get married or enter a civil partnership * Additional 4% of your salary to spend on extra benefits * Award-winning digital health and wellbeing service (Help@Hand) * Company performance based bonus - rewarding company and individual performance * Company Share Scheme - open to every Vertical employee * Company Pension Scheme - 5% and we match it * Breakfast on us, every day We may just be the hardest job you've ever had, but we're confident it will be the most rewarding. Join the team today and help us shape the future of Advanced Air Mobility. Disclaimer Statement We encourage you to apply even if you may not have all the experience listed in the advert. We recognise that talent comes in various forms and we are committed to providing opportunities that create an environment of growth, diversity, and inclusion for everyone. As part of our desire to review and make our processes fair, we may ask you questions related to these aspects during the application process. For more information on how we will use your data, see our Legal section.

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. Our R&D team is looking for an Electronics Engineer, Electrical Engineer, or related professional with a passion for mathematical modeling and advanced control systems to join our Modeling and Control Strategies team. We are seeking a cutting-edge technical profile focused on robust classical control theory, dynamic modeling of physical systems, and a strong orientation toward laboratory testing and validation. KEY RESPONSIBILITIES  * Design, simulate, and implement advanced control strategies and mathematical modeling for non-linear dynamic systems. * Work at the intersection of power electronics and renewable energy systems (inverters, microgrids, battery energy storage systems - BESS). * Apply System Identification techniques for controller optimization and parameter estimation. * Actively participate in simulation, prototyping, and real-time testing phases within internal and external laboratories. * Collaborate closely with a highly qualified technical and academic multidisciplinary team. EXPERIENCE AND REQUIREMENTS * Education: B.S./M.S. in Electronics Engineering, Electrical Engineering, or related fields (Mandatory). * Postgraduate: Current student or graduate of a Master’s in Automation and Control (or similar postgraduate programs). * Strong foundation in power electronics, power systems, and their dynamics. * Mathematical modeling, state-space variables, and system identification. * Proficiency in Matlab / Simulink and Python applied to control systems and simulation. * Languages: Professional fluency in English (technical reading and fluent communication). * Location & Availability: Preferably residing in Buenos Aires and surrounding areas. Candidates living in other regions of Argentina must be available to travel for agreed-upon face-to-face meetings. * Availability to travel to the various projects and internal/external laboratories we collaborate with. * Knowledge or experience in Machine Learning techniques applied to control optimization or system identification. * Proficiency in specific simulation tools and development environments: PSCAD, LabVIEW,and PSIM (or similar). * Experience or knowledge in simulation and validation methodologies: MIL (Model-in the-Loop), SIL (Software-in-the-Loop), PHIL (Power Hardware-in-the-Loop), CHIL (Controller Hardware-in-the-Loop), and Alpha Testing. * Experience with RCP (Rapid-Control-Prototyping) techniques. * Experience or strong interest in renewable energy (solar, wind, battery systems). * Practical experience with Real-Time Systems and laboratory testing/trials.     ---------------------------------------------------------------------------------------------------------------------------------- For US-based roles - What you’ll get: * Competitive salary + annual performance-based bonus eligibility * Medical, dental, and vision insurance * 401(k) with company match * Paid time off and company holidays  For Mexico-based roles - What you’ll get: * Competitive salary + annual performance bonus eligibility * Christmas Bonus (Aguinaldo): 30 days * Major medical expenses and life insurance * Paid time off and holidays (per local policy) For all roles: * Professional development and growth opportunities * Opportunity to grow with a mission-driven team shaping the future of clean energy * Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation. * Accommodations: If you need an accommodation during the application process, email recruitment@onenergystorage.com [recruitment@onenergystorage.com] * Benefits vary by role and location and are subject to change.