Proposal Engineer - Global Tech

At Ecolab, we are looking for a Proposal Engineer to join our Global High Tech (GHT) team, playing a key role in the development of technical and commercial proposals for industrial and high‑tech water treatment projects. In this position, you will collaborate closely with General Contractors (GCs), EPCs, and internal stakeholders to define project scope, prepare detailed cost estimations, and ensure alignment with EPC/EPCM execution models.

This role combines strong technical expertise with commercial insight, contributing directly to winning strategic projects and ensuring a seamless transition from proposal to execution.

• The GHT Proposal Engineer is responsible for developing technical and commercial proposals in response to requests from General Contractors for industrial, high‑tech, and infrastructure water projects. The role has a strong emphasis on scope definition, BOQ preparation, cost estimation, and alignment with EPC / EPCM execution models.

• Analyze RFQs, and technical specifications issued by General Contractors and EPCs.
• Work closely with CAM / BDM to define deadlines and scope of work expected by customers, clarify scope boundaries between process, packages, civils, piping, E&I, and construction responsibilities.
• Coordinate with internal engineering disciplines to ensure full technical compliance.
• Prepare technical narratives, BOQ file, scope descriptions, and clarifications aligned with GC tender frameworks.

• Fill detailed JCT (Job Costing Tool) and link to Bills of Quantities (BOQs) files required by tenders related to process equipment, packages, and associated systems.
• Quantify equipment, materials, and services based on PFDs, P&IDs, layouts, and tender specs.
• Build cost estimates for CAPEX and installation-related items, in coordination with procurement and engineering.
• Ensure BOQs are aligned with GC cost breakdown structures and tender forms.

• Select technologies and equipment ensuring compliance with client, GC, and regulatory requirements.
• Support risk identification, exclusions, assumptions, and interface management.

• Interface with engineering, procurement, finance, and project teams during bid preparation.
• Act as technical point of contact with General Contractors during clarification phases.
• Support bid strategy, value engineering options, and alternative solutions when requested by GCs.

• Ensure proposals meet GHT technical standards, contractual requirements, and ESG/HSE expectations.
• Support smooth handover from proposal to execution, ensuring BOQs and scope are execution‑ready.

• Degree in Chemical, Environmental, Mechanical, or Process Engineering.
• 3-5+ years of experience in proposal engineering, tendering, or project engineering for water/industrial projects.
• Proven experience responding to General Contractors / EPCs.
• Strong capability in BOQ preparation, quantity take‑offs, and cost estimation.
• Solid understanding of EPC and EPCM contract models.

• Strong analytical and numerical skills (costing, quantities, comparisons).
• Ability to interpret complex specifications and translate them into clear scopes and BOQs.
• Structured, detail‑oriented, and deadline‑driven.
• Effective communication with technical and commercial stakeholders.
• Comfortable working in international, multi‑disciplinary environments.

• Technical proposals and compliance matrices
• Detailed BOQs and cost summaries
• Scope of supply documents
• Clarifications & deviations logs
• Value engineering alternatives (where applicable)

• Functionally report in the Commercial Engineering organization to the GHT Scalable solutions Manager.
• Based in Spain / France / UK and have regular contact with his/her direct supervisor.
• Be familiar with water treatment process technologies.
• Be familiar with engineering drawings (P&, General Arrangement, Isometric sketches, data sheets, troubleshooting list, electrical and automation drawings, etc.).
• Proactively works with clients…