SCADA Network Specialist

The hiring salary for this position is $ 67,483.85 annually.

Open until filled with a best consideration date of September 14, 2026. This posting may close without notice.

Charles County Government is seeking an experiences SCADA Network Specialist to perform a variety of tasks associated with the maintenance, troubleshooting, and repair of the electronic and communications equipment used in the County’s water and sewer systems. The role involves working with complex electronic, computer, cybersecurity platforms and communications systems in water facilities, treatment plants, wells, pumping stations, and metering vaults.

This includes management and support of the Supervisory Control and Data Acquisition (SCADA) network, Remote Terminal Units (RTUs), Field Interface Units (FIUs), fiber optics, network switches, and various instrumentation and communication equipment.

• Perform preventive & corrective maintenance and troubleshooting of all electronics and communication systems across the Division’s water and sewer facilities.
• Diagnose and repair failures in SCADA equipment and instruments, including RTUs, FIUs, Programmable Logic Controllers (PLCs), fiber optic communication links, network switches, relays, power supplies, and Human Machine Interfaces (HMIs).
• Ensure the proper functioning of process controllers, including updating control logic parameters as necessary.
• Conduct Preventive Maintenance Inspections of equipment and facilities to ensure proper operation and compliance with specifications. Specifically, SCADA equipment, including RTUs, FIUs, Uninterruptible Power Supplies (UPS’s), fiber optic communication links, network switches, power supplies, HMIs and all process monitoring devices.
• Install, modify, and repair medium and low voltage electrical equipment, instrumentation, and communication systems in various locations, including water treatment plants and sewage pumping stations.
• Install and configure new 4-20 mA, and 0-5
  
  VDC instruments and ensure compatibility with SCADA systems.
• Assist in the installation of components for the SCADA network, including communication links, such as radios, cellular modems, power supplies, and fiber optics.
• Install, configure, and troubleshoot a wide variety of antennas used with Very High Frequency (VHF) radios and cellular modems.
• Evaluate the effects of proposed equipment on existing systems and perform modifications as required.
• Perform inspections at existing new facilities to ensure the equipment is working properly and meets design specifications.
• Ensure the functionality of SCADA systems and communication links using specialized monitoring and troubleshooting equipment and techniques.
• Program and troubleshoot PLCs using ladder logic and functional control block programming to ensure system performance.
• Deploy, maintain, and monitor HMI graphics, alarm management screens, and historical trends to ensure accurate data presentation and ongoing system performance.
• Work in collaboration with the Information Technology Division (IT) to identify and mitigate cybersecurity as well as physical threats.
• Maintain accurate records on the testing, calibration, and repair of instruments and equipment. Specifically, when testing 4-20mA instruments, VHF & Spread Spectrum radio’s as well as cellular modems.

• Maintain accurate records on the testing of VHF antennas and the associated coaxial cables and poly phasers.
• Use industrial test equipment (e.g., amp meters, voltmeters, oscilloscopes) to monitor, calibrate, and verify the performance of electronic and instrumentation systems.
• Serve as the emergency response technician for critical equipment failures reported by the Operations Division, ensuring rapid resolution and minimal disruption.
• Supports Operations…