Full-Time

Engineer 2/3

System Protection

Posted on 10/4/2025

Arizona Public Service

Arizona Public Service

1,001-5,000 employees

Delivers electricity to Arizona customers

No salary listed

Phoenix, AZ, USA

Hybrid

Employees are expected to reside in Arizona (or New Mexico for Four Corners-based employees). Hybrid roles require about 40% of time in-person.

US Citizenship Required

Category
Electrical Engineering (1)
Requirements
  • A four (4)-year Bachelors degree in an Engineering discipline or related applied science discipline (see approved list) from an ABET accredited institution, an International Engineering Alliance (IEA) recognized institution or an ABET Mutual Recognition Agreement (MRA)
  • Two (2) years working experience in Engineering-related positions
  • A Bachelors degree (4 years) in an engineering discipline or related applied science discipline (see approved list) from an ABET accredited institution, an International Engineering Alliance (IEA) recognized institution or an ABET Mutual Recognition Agreement (MRA) PLUS Five (5) years working experience in Engineering-related positions.
Responsibilities
  • 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 misoperation.
  • Participate in root cause analysis following the declaration of a protection system misoperation.
  • 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
Desired Qualifications
  • Is proficient at feeder relay settings and can complete them without supervision. May be asked to develop scope for feeder relay upgrade projects.
  • Is proficient at bus relay settings and can complete them without supervision. May be asked to develop scope for bus protection relay upgrades.
  • Can perform transformer relay settings with limited supervision. Understands principles of transformer protection and transformer protection design.
  • Can perform transmission line relay settings with limited supervision (excluding EHV and series compensated lines). Understands principles of transmission line protection and transmission line protection design.
  • Is an intermediate user of short circuit software and knows how to use the tool to perform studies for feeder protection, bus protection, transformer protection, capacitor protection, and transmission line protection.
  • Understands concepts about symmetrical components and can perform unbalanced short circuit calculation for radial systems. Is introduced to unbalanced short circuit calculations for networked systems using symmetrical components.
  • Understands concepts about typical power system transients and is familiar with typical applications where transients may challenge protection systems.
  • Understands basic concepts of generator/system stability and can apply them when working on projects involving generator interconnections on the distribution system.
  • Is introduced to generator interconnection projects on the transmission system under the supervision of a Senior or Consulting engineer.
  • Can perform capacitor bank relay settings with limited supervision. Understands principles of capacitor bank protection and capacitor bank protection design.
  • Understands the principles of event analysis and root cause analysis. Can perform sound event and root cause analysis on most normal fault operations. May need assistance more complex events.
  • Understands how protection practices affect transmission and distribution reliability metrics. Evaluates own work practices and departmental work practices for consistency with overall company reliability objectives.
  • May be assigned NERC compliance duties under the supervision of a Senior or Consulting engineer.
  • Is introduced to advance transmission line protection applications: series compensated lines and power swing blocking
Arizona Public Service

Arizona Public Service

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Arizona Public Service (APS) provides electric service to about 1.2 million customers across 11 of Arizona’s 15 counties, making it the state’s largest utility. It delivers power as a regulated utility, supported by a long history since 1886 and a focus on reliability, customer service, and responsible growth. How it works: APS generates and purchases electricity and distributes it through the electrical grid to homes and businesses, balancing price and service to meet demand. Its products are standard electricity plans and related services for residential, commercial, and industrial customers. Why it stands out: APS emphasizes accountability, safety, integrity, trust, and respect in its operations, with a stated goal of creating a sustainable energy future for Arizona and improving customer value and shareholder return. Its competitive edge comes from its scale, local presence, and commitment to steady service, safety, and sustainable energy planning in a fast-growing state.

Company Size

1,001-5,000

Company Stage

Debt Financing

Total Funding

$1.9B

Headquarters

Phoenix, Arizona

Founded

1886

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What makes Arizona Public Service unique

  • APS deploys AI cameras for early wildfire detection.
  • APS secures $1.8B DOE loan for solar and storage.
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Benefits

Hybrid Work Options

Company News

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INACTIVE