The (Sr) (Lead) Engineer position provides support for real-time EMS system model development and maintenance including tuning and maintenance of the State Estimator. The Engineer will coordinate the EMS database update and display building process to insure a coherent system model providing accurate modeling of real-time power system conditions in the Common Information Model (CIM) modeling tool. Other responsibilities include system database expansion for support of new and existing members, interfacing with Operations, Planning and Markets staff to incorporate requested application, display, and model changes, tuning of the State Estimator program and conversion of the EMS system model into a format suitable for use by the PJM Markets, Settlements and Fixed Transmission Rights (FTR) systems. The engineer will also design, test and perform maintenance to the PJM EMS. Additionally the engineer may be asked to present and represent the department in member and other stakeholder meetings or even industry meetings. Sometimes this may include coordinating and directing such meeting groups.