Design & Estimation Engineer

We are seeking an experienced and highly motivated Design & Estimation Engineer with a strong background in water and wastewater treatment systems. The ideal candidate will be responsible for developing process designs, preparing cost estimates, and delivering technically sound and commercially competitive proposals for a wide range of treatment plants.

This position requires a hands-on engineer capable of independently evaluating client requirements, developing optimized treatment solutions, and supporting projects from proposal stage through execution.

• Design and develop water and wastewater treatment systems, including MBBR, MBR, SBR, ASP, ETP, STP, UF, RO, and tertiary treatment systems.

Prepare and review:

• Process Flow Diagrams (PFDs)
• Piping & Instrumentation Diagrams (P&IDs)
• Hydraulic calculations
• Equipment sizing and process calculations
• General arrangement and process layouts
• Select and specify equipment including pumps, blowers, membranes, filters, chemical dosing systems, and sludge handling equipment.
• Ensure compliance with local regulations and internationally recognized engineering standards.
• Review RFQs, tender documents, specifications, and client requirements.
• Develop optimized technical solutions and treatment schemes.

Prepare:

• BOQs and BOMs
• Cost estimates and pricing sheets
• Techno-commercial proposals
• Evaluate vendor quotations and coordinate with suppliers to obtain competitive pricing.
• Support tender submissions and clarify technical and commercial aspects as required.

• Coordinate closely with Sales, Procurement, and Project Execution teams during proposal and implementation stages.
• Participate in client, consultant, and contractor meetings for technical discussions and clarifications.
• Provide engineering support during commissioning and troubleshooting when required.
• Contribute to standardization and continuous improvement of design and proposal processes.

• Bachelor's Degree in Chemical, Environmental, Mechanical, or Civil Engineering.
• 3-7 years of relevant experience in the design and estimation of water and wastewater treatment plants.
• Proven experience preparing technical proposals and cost estimates for STP, ETP, WTP, and RO systems.
• Strong understanding of biological treatment processes, membrane technologies, filtration systems, chemical dosing, and sludge treatment.
• Ability to independently interpret specifications and develop practical treatment solutions.
• Experience working with EPC contractors, system integrators, or water treatment companies will be an advantage.

• AutoCAD
• Advanced MS Excel
• BioWin and/or GPS-X
• WAVE and/or ROSA

• Water Treatment and RO Systems
• Biological Treatment Processes (MBBR, MBR, SBR, ASP)
• Ultrafiltration and Membrane Systems
• Chemical Dosing Systems
• Sludge Dewatering and Handling Systems
• Hydraulic Calculations and Equipment Sizing
• Cost Estimation and BOQ Preparation
• Technical Proposal and Tender Documentation

• Strong analytical and problem-solving abilities.
• Excellent technical writing and communication skills.
• Commercial awareness and attention to detail.
• Ability to manage multiple proposals and deadlines simultaneously.
• Self-driven, organized, and capable of working independently as well as within cross-functional teams.

• Competitive salary package and performance-based incentives.
• Opportunity to work on diverse and challenging water and wastewater projects.
• Long-term career growth into Senior Design Engineer, Proposal Manager, and Engineering Leadership roles.
• Collaborative and professional work environment with opportunities for continuous learning and development.