At Jabil (NYSE: JBL), we are proud to be a trusted partner for the world's top brands, offering comprehensive engineering, supply chain, and manufacturing solutions. With 60 years of experience across industries and a vast network of over 100 sites worldwide, Jabil combines global reach with local expertise to deliver both scalable and customized solutions. Our commitment extends beyond business success as we strive to build sustainable processes that minimize environmental impact and foster vibrant and diverse communities around the globe. Principal Power Control/SW Engineer Build your career with Jabil! We challenge and empower you to make the most of your talents while working with outstanding colleagues from diverse backgrounds who share your drive and passion to make Jabil grow! Job Summary The principal power control / SW engineer will lead control software, embedded firmware, and system integration for Battery Energy Storage System (BESS) products, including PCS/inverter controls, EMS/BMS interfaces, SCADA integration, protection logic, diagnostics, and critical power operating modes. This role translates system and customer requirements into reliable software architecture, control requirements, communication interfaces, validation plans, and release criteria to support safe, efficient, and compliant BESS operation. The engineer will work with power electronics, system architecture, battery engineering, test, manufacturing, quality, suppliers, and customers to deliver high-performance BESS platforms for commercial, industrial, utility-scale, microgrid, and critical power applications. Location: This role will be based at Jabil's Huangpu office in Guangzhou, Guangdong Province, China. Essential Duties and Responsibilities Lead BESS power control and software activities, including PCS/inverter controls, EMS/BMS interfaces, SCADA integration, protection logic, diagnostics, and critical power operating modes. Define control requirements for charge/discharge operation, grid-following and grid-forming behavior, reactive power, frequency response, black start readiness, fault ride-through, anti-islanding, safe shutdown, and system recovery. Develop and review software architecture, state machines, control sequences, communication mapping, alarms, diagnostics, cybersecurity requirements, configuration management, and release readiness criteria. Establish critical coding expectations, including modular design, coding standards, traceability, version control, code review, unit testing, static analysis, integration testing, HIL/SIL validation, cybersecurity review, and release control. Integrate BESS software with PCS, BMS, EMS, SCADA, site controllers, meters, protection relays, HVAC, fire safety interfaces, and customer or utility control systems. Plan and support software verification and validation, including requirements-based testing, regression testing, HIL/SIL testing, FAT/SAT, commissioning support, grid compliance testing, and field issue troubleshooting. Partner with suppliers, customers, test labs, and cross-functional teams to improve system performance, reliability, and launch readiness. May perform other duties and responsibilities as assigned. Job Qualifications Technical Knowledge & Skills Strong understanding of BESS control architecture, including PCS/inverter controls, EMS/BMS coordination, SCADA integration, site controllers, protection logic, grid services, and critical power operating modes. Solid experiences developing or specifying embedded software, firmware, PLC logic, EMS logic, or supervisory control software for power electronics, energy storage, UPS, microgrid, renewable energy, or industrial automation systems. Hands-on knowledge of critical software practices, including C/C++, Python, IEC 61131-3 PLC languages, MATLAB/Simulink model-based design, modular architecture, version control, requirements traceability, code review, unit testing, static analysis, regression testing, and release control. Familiar with software quality and safety practices such as MISRA C awareness, secure coding, cybersecurity review, functional safety concepts, FMEA/DFMEA support, configuration management, defect tracking, and requirements-based verification. Knowledge of industrial communication protocols such as CAN, Modbus TCP/RTU, IEC 61850, DNP3, MQTT, OPC UA, Ethernet/IP, RS-485, TCP/IP, and PCS/BMS/EMS/SCADA interfaces. Strong understanding of control functions for charge/discharge scheduling, active/reactive power control, frequency response, voltage support, ramp-rate control, peak shaving, islanding, black start readiness, fault ride-through, alarms, diagnostics, and fail-safe operation. Experience with simulation, test, and development tools such as MATLAB/Simulink, PLECS, PSIM, PSCAD, Python, Git, Jira, requirements management tools, HIL platforms, and protocol analyzers. Working knowledge of BESS and grid-related requirements, including UL 9540, UL 1741, IEEE 1547, IEC 61850, IEC 62477, IEC 61000, NEC awareness, NERC CIP awareness, and regional grid interconnection requirements. Non-Technical Knowledge & Skills Worked as part of a global team. Strong English communication skills, with the ability to communicate effectively across global teams. Build trusted relationships and effectively influence others and share best practices. Assess a project and articulate risk while developing project milestones. Develop projects in a stage-gate process (PLCM). Ability to manage multiple projects and priorities, meet commitments, and communicate risks, assumptions, and dependencies proactively. Ability to adapt quickly to changing customer, technical, and business requirements while effectively managing complexity and ambiguity. Demonstrates ownership and accountability in overcoming challenges and delivering results under pressure. Mentor less experienced engineers. Education & experience requirements Bachelor’s degree in Electrical Engineering, Control Engineering, Computer Engineering, Software Engineering, Power Electronics, Power Systems, Automation, or a related technical field is required. Master’s degree or Ph.D. in a relevant engineering discipline is preferred, especially with emphasis on control systems, embedded software, power electronics controls, power systems, grid-connected converters, automation, or energy storage systems. Typically requires 5+ years of hands-on experience in embedded software, firmware, controls engineering, EMS/SCADA integration, inverter controls, PLC programming, BESS integration, critical power systems, or related engineering roles. Experience in Battery Energy Storage Systems, PCS/inverter controls, UPS, microgrids, renewable energy, solar plus storage, EV charging, industrial automation, data center power, or utility-scale energy systems is strongly preferred. The Principal-level position is eligible for a target annual bonus of 20%. Jabil, including its subsidiaries, is an equal opportunity employer and considers qualified applicants for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, age, disability, genetic information, veteran status, or any other characteristic protected by law. Accessibility Accommodation If you are a qualified individual with a disability, you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access Jabil.com/Careers site as a result of your disability. You can request a reasonable accommodation by sending an e-mail to Always_Accessible@Jabil.com or calling 727-803-7988 with the nature of your request and contact information. Please do not direct any other general employment related questions to this e-mail or phone number. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to. BE AWARE OF FRAUD: When applying for a job at Jabil you will be contacted via correspondence through our official job portal with a jabil.com e-mail address; direct phone call from a member of the Jabil team; or direct e-mail with a jabil.com e-mail address. Jabil does not request payments for interviews or at any other point during the hiring process. Jabil will not ask for your personal identifying information such as a social security number, birth certificate, financial institution, driver’s license number or passport information over the phone or via e-mail. If you believe you are a victim of identity theft, contact your local police department. Any scam job listings should be reported to whatever website it was posted in. Jabil, including its subsidiaries, is an equal opportunity employer and considers qualified applicants for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, age, disability, genetic information, veteran status, or any other characteristic protected by law. Accessibility Accommodation If you are a qualified individual with a disability, you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access Jabil.com/Careers site as a result of your disability. You can request a reasonable accommodation by sending an e-mail to Always_Accessible@Jabil.com with the nature of your request and contact information. Please do not direct any other general employment related questions to this e-mail. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to. #whereyoubelong

Principal Power Control/SW Engineer.

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