PLC & SCADA Engineer - Water & Wastewater

About the role

The PLC & SCADA Engineer designs, programs, tests, commissions, troubleshoots and maintains PLC, HMI and SCADA systems for water and wastewater treatment plants. The role integrates instrumentation, electrical systems, VFDs, analyzers and field devices to ensure reliable plant operation and compliance with project specifications.

Key responsibilities

• Design PLC control systems and develop PLC software according to project specifications and functional design documents.
• Design and configure SCADA and HMI applications, and prepare control philosophies, I/O lists, network architecture and automation documentation.
• Review P&IDs, electrical drawings and control panel drawings.
• Develop PLC programs for treatment processes and configure communication protocols such as Modbus RTU/TCP, Profibus, Profinet, Ethernet/IP and OPC.
• Develop graphical SCADA screens, configure alarms, event logging, historical trending and reporting, user access levels and security, and integrate PLCs with SCADA servers.
• Perform FAT, SAT, I/O testing and loop checking, commission PLC and SCADA systems on site, troubleshoot automation and communication issues, and support plant start-up.
• Interface with field instruments (flow meters, pressure, level, pH, conductivity, DO, turbidity and chlorine analyzers) and coordinate with electrical and mechanical teams.
• Prepare Functional Design Specifications, operation manuals, commissioning reports, as-built documentation, backup of PLC and SCADA programs and technical reports.

Required profile

• Bachelor's degree in Automation, Electrical, Electronics or Instrumentation Engineering.
• 3-8 years of experience in industrial automation, with at least 5 years on water or wastewater treatment projects.
• Preferred: experience with WWTP, STP, WTP, RO, UF/MBR, pumping stations, desalination plants and industrial water treatment.
• Preferred certifications: Siemens, Rockwell, Schneider Electric, ISA CAP; valid UAE driving license.

Required skills

• PLC platforms: Siemens (S7-1200, S7-1500, TIA Portal, S7-300, S7-400H), Allen-Bradley (Rockwell), Schneider Electric, Mitsubishi, Omron (preferred)
• SCADA platforms: Siemens WinCC TIA Portal, FactoryTalk View, WinCC Unified, WINCC SCADA, HMI, Siemens Comfort Panels, Weintek
• Software: Siemens TIA Portal, WinCC, AutoCAD, Microsoft Office
• Competencies: PLC programming, SCADA development, automation system design, process control, instrumentation, electrical troubleshooting, commissioning, industrial networking, problem solving, teamwork and communication.