Process Manager

About the Role

Abunayyan Holding is seeking a Process Manager to lead the process engineering function for water, wastewater, and industrial wastewater treatment projects. This full-time position is based in Riyadh, Saudi Arabia, and requires a minimum of 10 years of experience. The role involves providing technical leadership from concept development through commissioning and performance validation, ensuring process solutions are technically sound, safe, economical, and compliant with standards.

Key Responsibilities

• Lead the development of technically and commercially optimized treatment solutions for various water applications.
• Establish design criteria, process guarantees, design margins, technology selection, and overall process philosophy.
• Prepare, review, validate, and approve manual process design calculations, mass balances, hydraulic profiles, equipment sizing, PFDs, P&IDs, control narratives, and process datasheets.
• Perform and review biological process simulations using BioWin, and membrane projections for RO, ultrafiltration, and EDI systems.
• Plan, assign, monitor, and review the work of process engineers and drafting personnel, ensuring quality and timely issuance of deliverables.
• Mentor and develop the process engineering team, enhancing technical capabilities and standardizing design practices.
• Select, size, and specify process equipment, including pumps, air blowers, vessels, valves, and sludge dewatering equipment.
• Coordinate process requirements and technical interfaces with multidisciplinary engineering and project teams.
• Lead technical meetings, design reviews, value engineering exercises, and HAZOP/HAZID activities.
• Manage technical clarifications and coordination with clients, consultants, authorities, vendors, and technology providers.
• Identify and manage technical risks, support commissioning and troubleshooting, and verify plant performance.

Required Qualifications and Experience

• Minimum 15 years of experience in process engineering and design for water, wastewater, and industrial wastewater treatment projects, with substantial experience in process leadership or management roles.
• Proven experience in leading process engineering teams and managing multidisciplinary project interfaces throughout the project lifecycle.
• Extensive technical knowledge of water treatment processes, including brackish water RO, seawater RO, softening, de-aeration, gas stripping, adsorption, media filtration, ultrafiltration, high-purity water treatment, EDI, disinfection, and remineralization.
• Extensive technical knowledge of wastewater treatment processes, including conventional activated sludge, MBBR, MBR, SBR, trickling filters, odor control systems, anaerobic digestion, industrial wastewater treatment, tertiary treatment, sludge handling, and sludge dewatering.
• Expertise in process equipment selection, sizing, specification, and technical evaluation.
• Ability to independently prepare, review, and validate manual process design calculations, including mass balances, hydraulic profiles, biological treatment, membrane systems, chemical dosing, air demand, sludge production, equipment capacity, and utility consumption.
• Hands-on experience in process simulation and projection software, primarily BioWin and recognized RO projection tools.
• Ability to diagnose process and treatment performance issues and develop practical, reliable, and cost-effective solutions.
• Extensive experience across all project stages, including conceptual design, proposal preparation, FEED/basic engineering, detailed engineering, vendor technical reviews, commissioning support, troubleshooting, and plant performance evaluation.
• Strong knowledge of process guarantees, design margins, process operability, maintainability, energy optimization, lifecycle costing, process safety, and applicable international standards and local regulatory requirements.