Position Summary   The Senior System Planning Engineer is a highly skilled position that assists with activities within the System Planning department. The Senior System Planning Engineer works closely with other departments to develop and prepare the expansion of the electric distribution and substation system. The Senior System Planning Engineer responsibilities requires a high level of competency and accuracy with little to no supervision. Senior System Planning Engineers are required to provide mentorship to less experienced engineers.   Primary Position Responsibilities   Develops, recommends, and implements processes and devices to comply with ERCOT emergency