System Protection Engineer III/Senior

APS•Phoenix, AZ

4d•Hybrid

About The Position

Arizona Public Service (APS) is seeking a Systems Protection Engineer III / Senior to support the reliable operation of its transmission and sub-transmission systems. This role involves developing and maintaining protective relay settings for systems 115KV and above, performing fault analysis and coordination studies using Siemens CAPE/APA software, supporting outage event analysis and system restoration, and driving improvements to protection schemes across the APS transmission network. The engineer will collaborate with Transmission Operations, Substation Engineering, Transmission Planning, and Protection & Control teams to ensure protection systems operate safely, reliably, and in compliance with industry standards.

Requirements

A four-year Bachelors degree in an engineering discipline or related applied science discipline from an ABET accredited institution, an International Engineering Alliance (IEA) recognized institution or an ABET Mutual Recognition Agreement (MRA).
Five (5) years working experience in Engineering-related positions (for Engineer III).
Eight (8) years working experience in Engineering-related positions (for Engineer Senior).
Critical Infrastructure Protection (CIP) access consistent with North American Electric Reliability Corporation (NERC) standards.
Ability to obtain and maintain CIP access for the duration of employment.
Must be a U.S. person (U.S. Citizen, U.S. Lawful Permanent Resident, Political Asylee, or Refugee) to comply with U.S. Export Control Laws.
Employees are expected to reside in Arizona (or New Mexico for Four Corners-based employees).

Nice To Haves

Experience with transmission protection and control systems.
Knowledge of protective relaying principles, fault analysis, and relay coordination.
Familiarity with transmission system modeling software and disturbance analysis tools.
Experience supporting NERC reliability and cybersecurity compliance programs.
Strong analytical, problem-solving, and collaboration skills.

Responsibilities

Develop, review, and maintain transmission and sub-transmission relay settings.
Perform fault studies, coordination analysis, and power system modeling.
Maintain protection system documentation and relay setting records.
Lead and support projects that improve protection system performance and reliability.
Analyze protection system operations and investigate relay misoperations.
Participate in root cause analyses and corrective action development.
Support field testing, commissioning, troubleshooting, and energization activities.
Respond to and support operations during system disturbances and grid events.
Configure and maintain Digital Fault Recorders (DFRs) and disturbance monitoring systems.
Support compliance initiatives related to NERC PRC and CIP standards.
Develop or revise relay settings in support of modifications to the transmission system.
Maintain an up-to-date short circuit model of the APS transmission and sub-transmission system.
Maintain up-to-date documentation of all relay settings in the transmission and sub-transmission system.
Develop programs/projects to improve existing protection systems across the APS transmission system.
Periodically review relay settings across the system to ensure adequate coordination and protection.
Provide support to field personnel during testing and commissioning of protection schemes.
Provide support to operations personnel during system events.
Review protection system operations to determine correct operation or mis-operation.
Participate in root cause analysis following the declaration of a protection system mis-operation.
Participate in NERC Compliance activities in support of applicable PRC and CIP standards.
Specification, design, create settings, and keep settings records of Digital Fault recorders installed in APS’s