Control Systems Engineer - Regional Wastewater Reclamation

Pima County • Tucson, AZ

21h

About The Position

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.

Requirements

• 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.
• 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.
• Qualifying education and experience must be clearly documented in the "Education" and "Work Experience" sections of the application. Do not substitute a resume for your application or write "see resume" on your application.
• Valid driver license is required at time of application.
• Valid AZ driver license is required at time of appointment.
• The successful applicant will be subject to a 39-month DOT Motor Vehicle Record review to determine applicant’s suitability to operate county vehicles in accordance with Pima County administrative procedures.
• Failure to obtain and maintain the required licenses and certifications shall be grounds for termination.
• Any offer of employment resulting from this recruitment is contingent upon Fleet Services’ review and approval of the candidate’s driving record.
• The County requires pre-employment background checks.
• Successful candidates will receive a post-offer, pre-employment background screening to include verification of work history, education, and criminal conviction history.
• Some positions may require satisfactory completion of a personal background investigation by the court or law enforcement agencies, due to the need for access to County Attorney and Court facilities, records, and communication systems.
• This position will require a post-job offer physical and/or drug screen.

Nice To Haves

• Minimum five (5) years experience as a Control Systems Engineer or in a related field, such as electrical engineering.
• Minimum five (5) years experience in PLC programming and control logic for system design.
• Minimum five (5) years experience in SCADA platform and HMI/OIT system design.
• Minimum five (5) years experience in industrial communication networks and cybersecurity.
• Minimum five (5) years experience in engineering plan review and capital integration.
• Minimum five (5) years experience in software scripting and object-oriented programming.
• Minimum five (5) years experience in system optimization, documentation, and operations support.
• Minimum five (5) years experience in field instrumentation and sensor maintenance.

Responsibilities

• 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++, VB.NET, 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.

Benefits

• Pima County Government is an Equal Employment Opportunity employer. We are committed to an inclusive and diverse workforce and will not discriminate in employment opportunities or practices on the basis of race, color, religion, national origin, age, disability, gender, sexual orientation, kinship, political interest, or any other characteristic protected by law.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior