• Execute commissioning procedures for utility-scale BESS systems, including battery management systems (BMS), inverters, switchgear, and SCADA interfaces. • Perform pre-functional and functional testing of all system components according to commissioning plans. • Conduct point-to-point checks, insulation resistance tests, performance tests, and system startup. • Identify and troubleshoot issues related to electrical, control, and communication systems. • Document test results, prepare commissioning reports, and maintain logs of issues and resolutions. • Coordinate with lead commissioning engineer, project managers, subcontractors and help ensure project milestones are met. • Ensure all commissioning activities adhere to safety, quality, and environmental standards. • Support remote and onsite troubleshooting post-commissioning as required and perpetuate field engineering and/or product knowledge. • Perform administrative functions; such as writing technical reports, ordering materials, securing quotations, preparing job status reports, reports to customers, time sheets, and expense sheets on a complete timely, and thorough basis. • Be knowledgeable of and conduct work activities in compliance with, the Energy Safety (EHS) Manual and Safety (EHS) policies. • Exercise good judgment in controlling costs and expenditures of Company funds. • Protect the Company's capital investments and Intellectual Property by properly safeguarding and maintaining equipment for which responsible. • Make contributions to the continued development and refinement of SSS Engineering Standards and Procedures (incl. Method Statements, Risk Assessments etc). • Develop knowledge of SSS Terms and Conditions and those of customers and subcontractors, and perform activities so as to minimize risk and assure compliance. • Dotted-line responsibility for assigned field resources to include: Provide performance feedback for field resources to service manager and employees as needed/required. • Assist Service Manager with retention and attraction of qualified field resources (including candidate screening, hiring recommendations, etc).