Proposal Engineer

HYDROLEAP PTE. LTD.; Singapore; On-site; SGD 60,000 - 95,000; Full time

Job summary

HYDROLEAP PTE. LTD. is seeking a detail-oriented Proposal Engineer to craft high-quality technical and commercial tenders for water and wastewater solutions. You will coordinate with Sales, Process/Applications, and Operations to translate customer needs into compelling proposals.

This hands-on role combines technical depth in water treatment with the discipline of tendering, requiring clear writing, accurate cost modelling, and timely submission.

Qualifications

• Bachelor's degree or higher in Environmental Engineering, Civil Engineering, Chemical Engineering, or related field.
• 3–7 years of experience in a proposal, tendering, or applications engineering role within water/wastewater, EPC, or related industry.
• Solid working knowledge of water and wastewater treatment technologies; exposure to electrochemical treatment is a plus.
• Ability to read P&IDs, process flow diagrams, and technical specifications, and to build CAPEX/OPEX cost models.
• Strong project coordination, technical writing, and editing skills.
• Proficient in MS Office Suite; experience with proposal, estimating, or document management tools is a plus.
• Comfortable working under tight deadlines and managing multiple proposals simultaneously.
• Strong cross‑functional communication skills, with the ability to bridge technical and commercial conversations.

Responsibilities

• Review enquiries, RFQs, and tender documents; assess technical feasibility and fit against Hydroleap's technology.
• Interrogate client-supplied water quality data (COD, BOD, TSS, TDS, conductivity, pH, hardness, flow profiles) and identify gaps that need clarification before pricing.
• Make and document bid / no‑bid recommendations.
• Select and size the treatment train, including electrochemical reactor sizing, pre-treatment and post-treatment stages, and sludge handling.
• Translate pilot and jar test results into full-scale design assumptions.
• Prepare process flow diagrams, mass balances, and general arrangement inputs with the design team.
• Define scope of supply, battery limits, exclusions, and deviations against client specifications.
• Build bills of materials and obtain vendor quotations for equipment, instrumentation, and installation.
• Develop CAPEX build‑ups and OPEX models covering power, consumables (electrodes, chemicals), sludge disposal, and maintenance.
• Apply margin and contingency in line with internal guidelines and flag commercial risk to the Engineering Manager and CFO.
• Write the full technical and commercial proposal document to a standard that requires minimal rework before submission.
• Manage submission deadlines, tender portal requirements, and document compliance.
• Respond to client technical clarifications and revise offers through the negotiation cycle.
• Attend techno-commercial meetings with clients alongside sales.
• Hand over won orders to Project Management with the full cost basis, assumptions, and risk register intact.
• Maintain a proposal library — reusable technical content, cost benchmarks, and vendor pricing.
• Track win/loss outcomes and feed lessons back into pricing and design assumptions.
• Operate within Hydroleap's Proposal-to-Commercialisation gate process.

Skills

Cross-functional communication

Technical writing

P&ID interpretation

Cost modelling

Project coordination

Editing

MS Office

Education

Bachelor's or higher in Environmental / Civil / Chemical Engineering

Tools

MS Office Suite

Proposal tools

Document management tools

Job description

About the Role

Hydroleap is looking for a detail-oriented Proposal Engineer to prepare high-quality technical and commercial proposals for our water and wastewater treatment solutions. Sitting at the interface between Sales, Process/Application Engineering, Operations, and other internal teams, you will translate customer requirements and technical designs into compelling,accurate, and competitive proposals. This is a hands‑on engineering role for someone who enjoys both the technical depth of water treatment processes and the discipline of winning tenders.

Key Responsibilities

Enquiry qualification and scoping

• Review incoming enquiries, RFQs, and tender documents; assess technical feasibility and fit against Hydroleap's technology.

• Interrogate client-supplied water quality data (COD, BOD, TSS, TDS, conductivity, pH, hardness, flow profiles) andidentifygaps that need clarification before pricing.

• Make and document bid / no‑bid recommendations.

Technical solution design

• Select and size the treatment train, including electrochemical reactor sizing, pre-treatment and post-treatment stages, and sludge handling.

• Translate pilot and jar test results into full-scale design assumptions.

• Prepare process flow diagrams, mass balances, and general arrangement inputs with the design team.

• Define scope of supply, battery limits, exclusions, and deviations against client specifications.

Costing and commercial modelling

• Build bills of materials and obtain vendor quotations for equipment, instrumentation, and installation.

• Develop CAPEX build‑ups and OPEX models covering power, consumables (electrodes, chemicals), sludge disposal, and maintenance.

• Apply margin and contingency in line with internal guidelines and flag commercial risk to the Engineering Manager and CFO.

Proposal production

• Write the full technical and commercial proposal document to a standard that requires minimal rework before submission.

• Manage submission deadlines, tender portal requirements, and document compliance.

• Respond to client technical clarifications and revise offers through the negotiation cycle.

• Attend techno-commercial meetings with clients alongside sales.

Handover and continuous improvement

• Hand over won orders to Project Management with the full cost basis, assumptions, and risk register intact.

• Maintain a proposal library — reusable technical content, cost benchmarks, and vendor pricing.

• Track win/loss outcomes and feed lessons back into pricing and design assumptions.

• Operate within Hydroleap's Proposal-to-Commercialisation gate process.

Requirements

• Bachelor's degree or higher in Environmental Engineering, Civil Engineering, Chemical Engineering, or a related field.

• 3–7 years of experience in a proposal, tendering, or applications engineering role within the water/wastewater treatment, EPC, or related industry.

• Solid working knowledge of water and wastewater treatment technologies and processes; exposure to electrochemical treatment is a plus.

• Ability to read and interpret P&IDs, process flow diagrams, and technical specifications, and to build CAPEX/OPEX cost models.

• Strong project coordination, technical writing, and editing skills.

• Proficient in MS Office Suite; experience with proposal, estimating, or document management tools is a plus.

• Comfortable working under tight deadlines and managing multiple proposals simultaneously.

• Strong cross‑functional communication skills, with the ability to bridge technical and commercial conversations.