As a Principal Engineer, you will be responsible for the design and development of new or existing power generation system parts, including diesel generator sets, alternate fuels, and BESS. This role involves defining system requirements with customers, coordinating with cross-functional teams, and managing design scope. You will verify manufacturing drawings, research engineering standards, and prepare calculations. The position requires selecting effective design concepts, reviewing customer specifications, and ensuring assignments meet RRPS quality standards. You will also mentor associate engineers and contribute to special projects.