Control Systems Engineer - Regional Wastewater Reclamation

Job Description Summary Department - Regional Wastewater Reclamation

Job Description OPEN UNTIL FILLED

Job Type: Classified Job Classification: 1171 - Control Systems Engineer Salary Grade: 17 Pay Range Hiring Range: $87,110 - $104,561 Annually Pay Range: $87,110 - $121,992 Annually Range Explanation:
Hiring Range is an estimate of where you can receive an offer. The actual salary offer will carefully consider a wide range of factors, including your skills, qualifications, experience, education, licenses, training, and internal equity. Pay Range is the entire compensation range for the position. The first review of applications will be on 08/28/2026.

The Control Systems Engineer, serving as a senior technical leader within Regional Wastewater Reclamation Department, drives high level system design, automation strategy, and continuous process optimization across municipal infrastructure. This position plays a pivotal role in leading Capital Improvement Program (CIP) projects guiding new capital builds from initial engineering design and contractor oversight through to full operational integration. By safeguarding network cybersecurity, advanced SCADA architecture, and PLC control logic, the role ensures long-term operational resilience and regulatory compliance across critical public works systems.

This classification is in the unclassified service and is exempt from the Pima County Merit System Rules.

• Maintains and troubleshoots Supervisory Control and Data Acquisition (SCADA) platforms within the WW Department
• Plans, prepares, and develops/constructs Human Machine Interface (HMI) and Operator Interface Terminal (OIT) systems
• Understands object-orientated programming (OOP) and scripts in computer languages such as C#, C++, , Python
• Prepares detailed control narratives, designs, and programs and updates ladder logic, function block diagrams, and structured text within Programmable Logic Controller (PLC) to provide control of various wastewater unit operations (pumps, motors, blowers, valves, chemical dosing and analyzing systems, etc.)
• Routinely maintains flow meters, pressure sensors, pH/conductivity probes, level sensors, and telemetry, including calibration and performance verification
• Configures and secures industrial communication systems—Ethernet/IP, Modbus, Profibus, fiber networks, radios, and cellular telemetry—linking remote sites to central control rooms
• Formally reviews engineering plans and specifications, selects control hardware/software, and coordinates with contractors to ensure new facilities integrate correctly with existing systems
• Analyzes operational data, streamlines automation logic, tunes control loops, and recommends equipment upgrades
• Assists water/wastewater plant operators, maintenance teams, and facilities staff to ensure they understand system behavior, can resolve issues, and operate equipment safely
• Redlines engineered drawings and updates control schematics, network diagrams, O&M manuals, asset lists, and change logs

Bachelor’s degree from an accredited college or university with a major in electrical engineering, control systems engineering, mechanical engineering, industrial engineering, civil engineering, computer engineering or a related field as determined by the department head at the time of recruitment AND two years of experience performing control systems duties within wastewater/water treatment or related public works facilities. (Relevant experience and/or education from an accredited college or university may be substituted) OR:
Four years with Pima County in an Instrumentation Process Control Coordinator II position OR two years with Pima County in an Instrumentation Process Control Supervisor position.…