Design Engineer & Proposal Engineer

We are looking for a skilled Design & Proposal Engineer with 3 - 5 years of experience in detailed engineering, technical proposal preparation, cost estimation, BOQ preparation, tender management for Water Treatment Plants (WTP), Wastewater Treatment Plants (WWTP), Effluent Treatment Plants (ETP), Sewage Treatment Plants (STP), and Reverse Osmosis (RO/SWRO) systems.

The candidate will be responsible for analyzing client requirements, preparing techno-commercial offers, obtaining vendor quotations, estimating project costs, and coordinating with design, procurement, sales, and project execution teams to submit competitive and technically compliant proposals.

Role & responsibilities

• Perform detailed mechanical design and engineering for WTP, WWTP, ETP, STP, SWRO, and BWRO projects.
• Design and optimize RO/NF membrane systems using ROSA, IMSDesign, or equivalent software.
• Develop process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), general arrangement (GA) drawings, and fabrication drawings.
• Perform hydraulic calculations, pipe sizing, pump sizing, head loss calculations, and NPSH analysis.
• Select and size pumps, blowers, diffusers, mixers, valves, filters, membranes, and other mechanical equipment.
• Design and develop mechanical systems for MBBR, MBR, SBR, ASP, UF, MMF, and other treatment technologies.
• Support the design of Zero Liquid Discharge (ZLD) and Minimum Liquid Discharge (MLD) systems, including RO, MEE, and ATFD.
• Prepare equipment datasheets, technical specifications, BOQs, material specifications, and vendor enquiry documents.
• Prepare piping layouts, equipment layouts, tank drawings, pressure vessel drawings, and skid fabrication drawings.
• Review vendor drawings, technical offers, and equipment specifications.
• Coordinate with process, electrical, instrumentation, procurement, and project execution teams.
• Ensure design compliance with applicable project specifications, engineering standards, and environmental regulations.
• Provide engineering support during fabrication, installation, commissioning, and troubleshooting.

Preferred candidate profile

• Strong knowledge of water and wastewater treatment plant design and mechanical engineering.
• Hands-on experience with AutoCAD 2D/3D and SolidWorks.
• Knowledge of RO membrane design and simulation tools such as ROSA, IMSDesign, or equivalent.
• Experience in hydraulic calculations, pump and blower sizing, piping design, and equipment selection.
• Good understanding of PFDs, P&IDs, GA drawings, fabrication drawings, and equipment datasheets.
• Familiarity with WTP, ETP, STP, WWTP, SWRO, BWRO, UF, MBR, MBBR, SBR, ASP, and ZLD systems.
• Knowledge of applicable ASME, IS, CPCB, and relevant project standards.
• Good communication, coordination, problem-solving, and technical documentation skills.