Principal Engineer in Transmission System Planning provides technical leadership, conducts complex system planning studies, elicits ideas for the solution of unique and/or complex engineering problems, and is accountable for major technical recommendations. This is a hybrid job. The first 3 months are in the office. The Principal Engineer must have extensive experience with modeling and planning the bulk electric power system, exhibit strong technical skills to apply to long-range load forecasting, testing and planning, and leverage company and industry data to anticipate optimal design for infrastructure improvements such as AC transmission lines, battery storage, FACTS devices, Inverter-Based Resources (IBR), etc. Studies will be conducted in adherence to criteria from Eversource, ISO-New England, Northeast Power Coordination Council (NPCC), and the North American Electric Reliability Corporation (NERC). This role also directs and prepares documents/testimony, written responses, and may testify for regulatory requirements and proceedings. This role represents the Company on regional and national transmission committees transmission planning matters for New England Power Pool (NEPOOL), NERC, NPCC, and ISO-NE as needed.