Senior Process Engineer – Water & Wastewater Treatment

Qureos Inc; Sharjah; On-site; AED 446,000 - 781,000; Full time

Job summary

Qureos Inc. is seeking a senior water and wastewater process engineer to lead design and engineering for complex water treatment projects in the UAE. The role covers PFDs, P&IDs, hydraulic calculations, and equipment sizing from design basis through commissioning.

The candidate should bring 8–10 years of direct water/wastewater experience, strong RO/membrane design knowledge, and proficiency with AutoCAD and Excel. Arabic fluency is a plus as is EPC/consultancy experience.

Qualifications

• Bachelor's degree in Chemical Engineering, Environmental Engineering, or a closely related discipline.
• Minimum 8–10 years of direct experience in water and wastewater treatment engineering.
• Strong knowledge of RO design, membrane systems, filtration, chemical dosing, and hydraulic calculations.
• Familiarity with AWWA, ASTM, ASME, and international water treatment standards.
• Proficiency in AutoCAD, MS Excel, and engineering calculation tools.
• Experience with membrane design software such as WAVE, ROSA, or equivalent is an advantage.
• Strong technical reporting, engineering documentation, and English communication skills.

Responsibilities

• Develop and review PFDs, P&IDs, process descriptions, and design basis documents.
• Perform process calculations, hydraulic calculations, mass balances, and equipment sizing.
• Design and select water and wastewater treatment processes including RO, UF, MMF, Activated Carbon, Greensand filtration, and chemical pretreatment.
• Prepare equipment datasheets and technical specifications for pumps, vessels, filters, blowers, mixers, and chemical dosing systems.
• Prepare hydraulic profiles, pump head calculations, and control philosophies.
• Develop process control narratives, cause-and-effect matrices, and operating sequences.
• Review vendor offers, drawings, calculations, and equipment selections.
• Prepare technical bid evaluations and vendor document review comments.
• Coordinate with mechanical, electrical, instrumentation, automation, and project engineering teams.
• Review 3D models for process compliance and accessibility.
• Respond to client technical comments, RFIs, and engineering clarifications.
• Support HAZOP, design reviews, FAT, pre-commissioning, commissioning, and performance testing.

Skills

RO design

Membrane systems

Filtration

Chemical dosing

Hydraulic calculations

English communication

Technical reporting

Education

Bachelor's degree in Chemical/Environmental Engineering

Tools

AutoCAD

MS Excel

WAVE

ROSA

Job description

Key Responsibilities

Process Design & Engineering

• Develop and review Process Flow Diagrams (PFDs), Piping & Instrumentation Diagrams (P&IDs), process descriptions, and design basis documents.
• Perform process calculations, hydraulic calculations, mass balances, and equipment sizing.
• Design and select water and wastewater treatment processes, including:
• o Reverse Osmosis (RO), Ultrafiltration (UF), and Multimedia Filtration (MMF).
• o Activated Carbon Filtration, Greensand Filtration, and chemical pretreatment.
• o Clarification, coagulation, flocculation, and sludge treatment.
• o Sewage Treatment Plants (STP), MBR, MBBR, SBR, and biological treatment systems.
• o Chemical dosing, neutralization, disinfection, and CIP systems.
• Prepare equipment datasheets and technical specifications for pumps, vessels, filters, blowers, mixers, and chemical dosing systems.
• Prepare hydraulic profiles, pump head calculations, and control philosophies.
• Develop process control narratives, cause-and-effect matrices, and operating sequences.

Project Engineering & Coordination

• Review vendor technical offers, drawings, calculations, and equipment selections.
• Prepare technical bid evaluations (TBE) and vendor document review comments.
• Coordinate with mechanical, electrical, instrumentation, automation, and project engineering teams.
• Review 3D models and equipment layouts for process compliance and accessibility.
• Respond to client technical comments, RFIs, and engineering clarification requests.
• Support HAZOP, design reviews, FAT, pre‑commissioning, commissioning, and performance testing.

Technical Requirements

• Bachelor's degree in Chemical Engineering, Environmental Engineering, or a closely related discipline.
• Minimum 8–10 years of direct experience in water and wastewater treatment engineering.
• Strong knowledge of RO design, membrane systems, filtration, chemical dosing, and hydraulic calculations.
• Familiarity with relevant AWWA, ASTM, ASME, and international water treatment standards.
• Proficiency in AutoCAD, MS Excel, and engineering calculation tools.
• Experience with membrane design software such as WAVE, ROSA, or equivalent is an advantage.
• Strong technical reporting, engineering documentation, and English communication skills.

Candidate Profile

We are looking for a technically strong engineer who can independently take a water treatment project from design basis through detailed engineering and support commissioning, rather than someone experienced only in plant operation or maintenance. Preference will be given to candidates with EPC contractor, water treatment OEM, or engineering consultancy experience.