IT Infrastructure Engineer III / Senior

APS•Phoenix, AZ

1d•Hybrid

About The Position

At APS, this role helps keep Arizona’s energy flowing by ensuring the technology behind our non‑nuclear generation fleet is reliable, secure, and ready for the future. As an IT Infrastructure Engineer III or Senior, you’ll support the systems that power renewable and fossil generation facilities, making sure operators have dependable tools to safely generate electricity every day. Your work directly supports APS’s mission to deliver safe, reliable energy to the communities we serve across Arizona.

Requirements

Bachelors' degree in Information Technology or related field
PLUS five (5) year of prior relevant experience or equivalent combination of education and directly related experience (for IT Infrastructure Engineer III)
Requires strong technical knowledge within a job area or system and basic knowledge across related technical areas (for IT Infrastructure Engineer III)
PLUS seven (7) year of prior relevant experience or equivalent combination of education and directly related experience (for IT Infrastructure Engineer Senior)
Requires in-depth level of technical knowledge within a job area and working knowledge of other technical areas (for IT Infrastructure Engineer Senior)
Experience supporting IT infrastructure and applications in an operational or industrial environment
Knowledge of renewable generation systems (primary) and fossil generation systems (secondary)
Background working with SCADA or similar operational technology environments
Willingness and ability to travel to generation sites and serve as the “face” of the IT team
A collaborative, service‑oriented mindset with a focus on reliability, safety, and customer support

Nice To Haves

Proficient in maintaining/troubleshooting SCADA human to machine interface (HMI) platforms with associated applications within renewable and fossil generation environments.
Troubleshooting; installing and repairing PC hardware and software; advanced design, maintenance and repair of servers; applying creative solutions to business problems to ensure business needs are most effectively met; advanced information system configuration management
Knowledge of all infrastructure technologies (compute, storage, networking, physical infrastructure, software, commercial off the shelf (COTS) and open source packages and solutions, virtual and cloud including IaaS, PaaS and SaaS); infrastructure management tools and monitoring tools; solution sizing for hardware/software platforms; industry standard security requirements and designs.
Knowledge of renewable and fossil generation plant equipment, including inverters, controllers, and tracking systems
Skilled in configuring and supporting industrial control‑system communications using SEL, Modbus, DNP3, OPC and other protocols
Experience supporting battery management systems, including troubleshooting issues and interfacing with vendors
Experience providing network support, including troubleshooting, configuration, and performance monitoring
Proficient in server administration across virtualized and physical environments for both Windows and Linux systems. This includes assisting with the design of systems and ensuring architecture standards are met.
Hands‑on experience managing and supporting Active Directory, including user/group administration and policy management
Ability to travel to generation facilities and corporate offices as needed to support operational and project activities
Ability to develop and write technical documentation; evaluate and test emerging technologies.

Responsibilities

Support and maintain SCADA and related infrastructure that enables renewable and fossil generation facilities to operate reliably
Partner with generation teams to troubleshoot issues, support applications, and improve system performance
Travel to generation sites to provide hands‑on support and represent the IT team as a trusted technical partner
Work on infrastructure projects that strengthen security, reliability, and future readiness of generation systems
Participate in a 24x7x365 rotational support model to help ensure continuous operations (standard schedule M–F, 8–5)
Build and maintain fossil and renewable generation human to machine interface (HMI) systems within a process control environment.
Drive restoration of HMI/SCADA systems impacting generation operations
Execute HMI lifecycle replacement and upgrade projects across the generation fleet
Interface with vendors for support and engineering of systems during projects and upgrades
Troubleshoot industrial communication protocols to ensure data flow within engineering and operating systems
Support Linux and other non-Windows devices within an energy management system (EMS) at renewable generation facilities
Provide higher level support to help desk personnel or other engineers/analysts with less experience
Participate in a rotating 24/7 on-call support schedule for mission-critical applications
May manage projects at this level, requiring responsibility for the delegation of work and the review of others' work products and engineering projects
Participates in business requirements meetings
Partners with technical architects to translate the architectural designs into operations
Serve as primary on-site IT/OT representative for generation facilities
Acts as primary coordination point between Generation IT, Network Engineering, Cybersecurity, and plant operations