Sr. Instrumentation & Controls Technician - Water/Wastewater

Liberty Personnel Services, Inc.; Grimes (IA); On-site; USD 60,000 - 85,000; Full time

Benefits offered by this job

Medical, Dental, and Vision Insurance

401(k)

Life Insurance

Paid Time Off

Job summary

Liberty Personnel Services, Inc. seeks a Controls Technician to join a growing team delivering PLC-based control systems for municipal water and wastewater projects. This hands-on, field‑based role offers autonomy, real‑world problem‑solving, and exposure to cutting‑edge instrumentation and automation in critical infrastructure.

You’ll troubleshoot, test, and repair PLC/HMI systems, calibrate instrumentation, install VFDs, and support commissioning in diverse field environments, with ~30% travel.

Qualifications

• Associate’s degree in Electrical Technology or equivalent hands‑on experience.
• Experience with PLC troubleshooting (Allen‑Bradley, Siemens).
• Experience with HMI systems (FactoryTalk or similar).
• Experience with VFD installation and maintenance.
• Experience with industrial instrumentation and calibration.
• Experience with process‑related controls.

Responsibilities

• Troubleshoot, test, and repair PLC‑based control systems.
• Perform instrumentation calibration (flow, pressure, level, temperature, transmitters).
• Install, modify, and service VFDs and motor control systems.
• Execute control panel modifications and system upgrades.
• Support commissioning and startup of automation systems.
• Diagnose and resolve issues across Allen‑Bradley and Siemens PLC/HMI platforms.
• Work directly with customers in the field, ensuring high‑quality service and communication.

Skills

PLC troubleshooting

HMI systems

VFD installation

Industrial instrumentation

Process controls

Education

Associate’s degree in Electrical Technology or equivalent hands‑on experience

Job description

Are you ready to take your controls career to the next level? Join a growing, industry-leading organization where your skills in water/wastewater systems and industrial automation will directly impact critical infrastructure. This is a hands‑on, field-based role offering variety, autonomy, and the opportunity to work on cutting‑edge control systems in real‑world environments.

If you enjoy troubleshooting, problem‑solving, and working with advanced PLC and instrumentation systems—this is a role you’ll want to explore.

Why You’ll Want This Role

• Work on municipal water & wastewater systems
• Be part of a supportive, forward‑thinking team
• Enjoy diverse field work—no two days are the same
• Strong career growth in a stable, essential industry
• Competitive compensation + excellent benefits package

What You’ll Be Doing

• Troubleshoot, test, and repair PLC‑based control systems
• Perform instrumentation calibration (flow, pressure, level, temperature, transmitters)
• Install, modify, and service VFDs and motor control systems
• Execute control panel modifications and system upgrades
• Support commissioning and startup of automation systems
• Diagnose and resolve issues across Allen‑Bradley and Siemens PLC/HMI platforms
• Work directly with customers in the field, ensuring high‑quality service and communication

What We’re Looking For

• Associate’s degree in Electrical Technology or equivalent hands‑on experience
• Experience with:
  • PLC troubleshooting (Allen‑Bradley, Siemens)
  • HMI systems (FactoryTalk or similar)
  • VFD installation and maintenance
  • Industrial instrumentation and calibration
  • Process‑related controls
• Strong problem‑solving skills and attention to detail
• Ability to work independently in a field‑based role
• Comfortable with ~30% travel

What You’ll Get

• Comprehensive Medical, Dental, and Vision Insurance
• 401(k) with company support
• Life Insurance
• Generous Paid Time Off
• Long‑term career stability in a high‑demand industry

Keywords: Controls Technician, PLC, HMI, VFD, Instrumentation, Field Service, Allen-Bradley, Siemens, Water/Wastewater, Automation Systems