DCS; Distributed Control System & Instrumentation Engineer - Yokogawa

Six Construct, a subsidiary of the BESIX Group, is the largest Belgian construction company operating in the Middle East. The company combines the efforts of a highly skilled workforce, along with strategic planning and innovative use of technology to overcome the most complex business challenges. Six Construct is a multi‑services company that operates in the construction of commercial and residential buildings, sport and leisure facilities, infrastructure and marine‑related projects.

The company currently employs a workforce of approximately 4,000 in the Middle East, and a total of 10,000 worldwide.

• The DCS (Distributed Control System) & Instrumentation Engineer is essential to keeping the sewage treatment plant running safely, reliably, and efficiently. This role ensures that all automation, control systems, and instruments work correctly—protecting people, the environment, and plant performance.

A DCS & Instrumentation Engineer with strong expertise in Yokogawa DCS (e.g., CENTUM/Prosafe) and SCADA systems for sewage treatment plant operations. The role involves end‑to‑end responsibility for process control, instrumentation asset reliability, and industrial communications, with a particular focus on maintaining the health and performance of Profibus (DP/PA) networks. The engineer must have experience working in corrosive, H₂S‑prone STP environments, ensuring safety, regulatory compliance, continuous operations, and overall optimization of plant performance.

• DCS / SCADA & Control Systems
  • Administer, operate, and optimize Yokogawa DCS, including control strategies, graphics, alarms, trends, historian tags, and backup/restore.
  • Maintain and enhance SCADA interfaces, dashboards, and reporting for O&M and compliance KPIs.
  • Develop, test, and implement logic modifications (loop tuning, interlocks, per missives, sequences) with strict MOC procedures.
  • Manage alarm rationalization and limit settings to reduce nuisance alarms and improve operator effectiveness.
  • Coordinate factory and site acceptance testing (FAT/SAT) for control system changes and expansions.
• Instrumentation
  • Own the lifecycle of field instruments, including selection, installation, calibration, loop checks, diagnostics, and replacement.
  • Typical devices include DO, pH/ORP, turbidity/SS, ammonium/nitrate, chlorine, flow (magnetic/ultrasonic), pressure, level (radar/ultrasonic), vibration, temperature, and gas detection.
• Profibus DP/PA & Industrial Communication
  • Ensure Profibus DP/PA network reliability, including topology design, segment diagnostics, termination, shielding/earthing, redundancy, spur lengths, baud rates, device addressing, and GSD management.
  • Use diagnostic tools (e.g., bus analyzers) to identify noise, reflections, voltage drops, telegram errors, and intermittent faults.
  • Integrate field devices via Profibus PA couplers/links, gateways, and interfaces to Yokogawa DCS/SCADA; maintain device libraries.
  • Collaborate with electrical and control teams for EMI mitigation, proper cable routing, and panel/earthing standards.
  • Support interfaces with MCCs/VFDs, PLC skids, and plant SCADA/IMS/CMMS systems.
• Safety, Compliance & Cybersecurity
  • Ensure all DCS/SIS activities comply with plant safety standards, IEC standards, and cybersecurity policies.
  • Strengthen OT cybersecurity posture through access control reviews, patch management, and secure network segmentation.
  • Develop a long‑term DCS roadmap covering upgrades, expansions, and obsolescence risks (software and hardware).

• Bachelor’s degree in Instrumentation & Control, Electrical, Electronics, or a related engineering discipline
• 5–10 years of experience in process automation, with strong hands‑on expertise in Yokogawa DCS/SCADA within water, wastewater, or similar process plant environments
• Proven experience in Profibus DP/PA commissioning, troubleshooting, and diagnostics
• Solid background in instrumentation for STP processes, including work in hazardous and corrosive environments (H₂S‑prone areas)
• Familiarity with SIS/ESD systems (e.g., Pro Safe‑RS), alarm management, loop tuning, and historian/reporting tools
• Experience working with CMMS and IMS documentation systems

• Exciting Projects
• Career Growth
• Diverse Team
• Competitive Benefits
• Positive Workplace Culture

Six Construct is guided by our core values of respect, excellence, co‑creation, passion, and unity. Our values are at the heart of everything we do, creating a diverse and inclusive workplace where everyone feels valued, secure, and motivated to reach their full potential.