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Company Overview: SK On, a proud member of SK Group, the second largest conglomerate with a revenue size of $150 billion, is one of the fastest growing manufacturers globally. With ambitious plans to reach over 180GWh manufacturing capacity in US, SK On is at the forefront of innovation in the energy storage sector. In response to the increasing domestic demand, SK On is set to manufacture state-of-the-art 5.3MWh DC Blocks, fully compliant with the latest US domestic content requirements and eligible for full ITC benefits. Additionally, SK On has contracted and awarded projects totaling 7GWh to be installed in the US starting in 2026, driving aggressive roadmap targeting 20GWh in orders and commitments for the 2026 fiscal year.

Role Summary:As we continue to expand our footprint in both utility-scale BESS and emerging power solutions for data center infrastructure, we are seeking an experienced Systems Integration Engineer to join our growing Energy Storage team in SK On US team.

Serving as a bridge between the company, its customers, and vendors, the Systems Integration Engineer ensures technical excellence throughout pre-sales activities to lifecycle support of the solution. Core responsibilities include delivering hands-on technical contract negotiations, and ensure battery, inverter, and software are functioning as a single, coherent machine that meets performance guarantees. This role will be reporting to the Director of System Integration and Engineering (technical leadership) at SK On ESS US Team.

Key Responsibilties

• Participate in the initial design and architecture for Battery Energy Storage Systems (BESS), Energy Management Systems (EMS), and Power Conversion Systems (PCS) integration.
• Participate in all the technical activities to align the technical requirements to align with vendors, and associated design implementation at the test facility.
• Participate in Factory Acceptance tests at SK test facility as well as vendor facilities.
• Lead the design and implementation of the test facility and contributor towards designing the use cases and the test reports, focusing on BESS communication effectiveness with utility grid and dispatch controllers.
• Verify that SK DC product, PCS and EMS performance results are built on evidence at the SK test facility and also in the field.
• Lead the technical documentation and other associated activities to ensure successful delivery and optimized service from commissioning to lifecycle support of the delivered solution.
• Deliver training to field personnel and all the stakeholders for commissioning and troubleshooting of the platform.
• Perform additional duties as assigned.

Qualifications:

• Education Background: A bachelor's or master's degree in engineering (electrical, mechanical, or computer science) or a related field.
• Experience: a minimum of 3-5 years in technical and engineering capacity. Must have strong experience within the BESS industry, focusing on utility-scale projects or direct experience in energy storage system design and all associated equipment. Eperience supporting the technical execution of major utility-scale project contracts is highly desirable.
• Technical Skills: Strong knowledge of Battery Storage Systems (BESS), including how the cells, batteries, and modules are designed and integrated. Skilled in designing entire systems, such as Power Conversion Systems, medium voltage transformers, substations, and Gen-Tie connections. Well-versed in power electronics and have hands-on experience with BMS/EMS/SCADA (PLC Programming or RTAC or PPC) systems. Experience with communication protocols (DNP3, Modbus, IEC 61850). Familiarity with IEEE 2800 is a plus.
• Codes & Standards: Familiarity with safety standards including NFPA 855, NPA 68/69, UL 9540A, and electrical safety standards such as NEC, IFC/IBC.
• Software Proficiency: Proficiency with Microsoft Office. Data analysis software knowledge is a plus (Power BI, and others)
• Soft Skills: Demonstrated leadership, communication, negotiation, and problem-solving skills, with an ability to manage multiple projects simultaneously.
• Work Location: Local to one of our SK Office (Atlanta, GA or Troy, MI) preferred but not a requirement
• Certifications (Optional): Professional Engineer (PE) license is a plus