Senior Transmission Protection Engineer

Arizona Public Service - APS; Phoenix (AZ); Hybrid; USD 90,000 - 130,000; Full time

Job summary

Arizona Public Service (APS) is seeking engineers to develop, review, and maintain relay settings for the APS transmission system. You will perform fault studies, protection coordination analysis, and modeling to ensure reliability and safety across the grid.

The role includes documenting protection schemes and supporting field testing, with a strong emphasis on NERC PRC/CIP compliance. The position supports hybrid work arrangements, requires an ABET-accredited engineering degree, and 5+ years

Qualifications

• Four-year engineering bachelor degree from an ABET-accredited institution or equivalent.
• 5+ years for mid-level/Engineer III.
• 8+ years for Engineer Senior position.

Responsibilities

• Develop or revise relay settings for transmission and sub-transmission systems.
• Maintain up-to-date short circuit models and protection documentation.
• Support field testing, commissioning, and energization activities.
• Lead projects to improve protection system performance and reliability.
• Contribute to root cause analyses following protection mis-operations.
• Support NERC PRC and CIP compliance efforts.

Skills

Protection relaying

Transmission protection

Relay coordination

NERC reliability compliance

Analytical problem solving

Education

ABET-accredited engineering degree (BS)

Tools

Power system modeling software

Job description

Arizona Public Service (APS) is seeking engineers to develop, review, and maintain relay settings for the APS transmission system. You will perform fault studies, protection coordination analysis, and modeling to ensure reliability and safety across the grid.

The role includes documenting protection schemes and supporting field testing, with a strong emphasis on NERC PRC/CIP compliance. The position supports hybrid work arrangements, requires an ABET-accredited engineering degree, and 5+ years