Senior Water & Wastewater Process Engineer – RO/UF Design

Urban Ridge Supplies; Sharjah; On-site; AED 350,000 - 550,000; Full time

Job summary

PACT Engineering FZC is seeking an experienced Senior Process Engineer to lead design and engineering for industrial and municipal water treatment, desalination, and WWTP projects. You will independently develop process designs, perform calculations, prepare technical documentation, and coordinate with multidisciplinary teams on EPC and packaged plants.

Responsibilities include creating PFDs/P&IDs, performing mass balances, sizing equipment, and coordinating with mechanical, electrical,

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 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.

Responsibilities

• 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 RO, UF, MMF, filtration, and biological treatment 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.
• Review vendor offers, calculations, and equipment selections.
• Coordinate with multidisciplinary teams and support HAZOP, FAT, commissioning, and testing.

Skills

Process design

PFDs & P&IDs

Hydraulic calculations

Engineering coordination

Technical documentation

English communication

Education

Bachelor's degree in Chemical Engineering or Environmental Engineering

Tools

AutoCAD

MS Excel

WAVE

ROSA

Job description

PACT Engineering FZC is seeking an experienced Senior Process Engineer to lead design and engineering for industrial and municipal water treatment, desalination, and WWTP projects. You will independently develop process designs, perform calculations, prepare technical documentation, and coordinate with multidisciplinary teams on EPC and packaged plants.

Responsibilities include creating PFDs/P&IDs, performing mass balances, sizing equipment, and coordinating with mechanical, electrical,