Lead Process and Mechanical Engineer

JOB SUMMARY: As a lead engineer responsible for process and mechanical design of “Seawater Treatment Systems” like Ultrafiltration, RO and Sulphate Removal Unit for offshore (Platforms / FPSO), and onshore oil & gas facilities. The role covers the full project lifecycle — from pre-bid and tender support, concept selection and technology selection, through FEED and detailed design, to fabrication follow-up, FAT, installation, commissioning and performance testing. As the discipline technical authority for the water treatment packages, the Lead Engineer owns the process and mechanical design basis, leads and checks the work of a small squad of engineers and designers, and acts as the principal technical interface to clients, EPC contractors, class societies and vendors. KEY RESPONSIBILITIES: • Design of RO, UF, and SRU (Sulphate Removal) packages for onshore, platform and offshore FPSO facilities. • Develop PFDs, P&IDs, mass/heat balances, and hydraulic calculations. • Preparation of Process datasheets for Equipment and Instruments. • Preparation of Process Philosophies like Control, Startup/Shutdown, and Operation /Maintenance philosophies. • Size membranes, skids, pumps (booster/HP), vessels, and piping for offshore facilities with considering weight/space constraints. • Select materials for corrosive seawater service and chemical compatibility. • Identifying all client's comments and communications, to ensure client's comments / requirements are implemented, as well as feedback to project management and commercial team, raise trends / potential change orders, as necessary. • Review vendor documents and provide comments to ensure the vendor design is in line with the project requirements. • Prepare technical specifications, datasheets, and MTOs per client/EPC standards (API, ASME, NORSOK, ISO) • Review vendor packages (membrane suppliers, skid fabricators and etc.,) and co-ordinate HAZOP, Model Review, FAT, SAT and etc., • Interface with piping, structural, E&I and layout teams for skids and module integration. • Prepares training manuals and owner’s manuals for on-site training. • Provide and prepare input to operating manual, pre-commissioning and commissioning manual. • Contribute to weight / space optimization studies for skid and modules • Understand the project & client’s contractual requirements and scope of work. Clarify scope of work and supply to form the contract basis with client. • Establish and own the design basis, process design criteria and equipment sizing basis for each package; verify and approve calculations produced by the squad. • Perform and check mechanical design of package equipment — pressure vessels and membrane/filter housings (ASME VIII Div. 1), skid structural arrangements, lifting and sea-transport load cases, nozzle orientation, piping layout and flexibility inputs, and rotating equipment selection. • Prepare and review mechanical datasheets and specifications for HP/booster pumps, dosing and chemical injection packages, cartridge filters, media filters, hydrocyclones, heat exchangers, blowers and CIP units. • Ensure compliance with class and regulatory requirements for offshore packages (DNV, ABS, Lloyd’s Register), flag/coastal state rules and marine warranty requirements. • Lead and participate in HAZOP, HAZID, SIL, SAFOP and 3D model reviews (30 / 60 / 90%); close out actions and maintain the action tracking register. • Plan and control discipline man-hours, deliverables and schedule against the budget; report progress, risks and trends to the Project Manager and Engineering Manager. • Mentor, coach and technically supervise junior process and mechanical engineers and designers; act as discipline checker / approver for squad deliverables. • Support FAT, SAT, pre-commissioning, commissioning, start-up and performance / guarantee tests; troubleshoot process upsets such as membrane fouling and scaling, flux decline, differential pressure rise and off-spec permeate quality. • Drive standardisation of package designs, capture lessons learned and contribute to continuous improvement of in-house design tools, typicals and specifications. PRE-BID, TENDERING AND PROPOSAL SUPPORT: • Review ITT / ITB packages, client specifications and scope of work; identify technical risks, scope gaps and cost drivers, and prepare the deviation / exception and technical clarification registers. • Develop conceptual and FEED-level process design for bids — water balance, membrane projections (WAVE, IMSDesign, ROSA, Toray DS), preliminary PFDs, equipment lists, process descriptions and control philosophies. • Produce preliminary equipment sizing, skid weights, footprint and layout envelopes, and utility / chemical consumption figures — critical for weight- and space-sensitive offshore and FPSO topside bids. • Issue RFQs to membrane suppliers, package vendors and skid fabricators; run technical bid evaluations (TBE) and recommend the most competitive compliant technology and vendor. • Prepare MTOs, engineering man-hour estimates and the basis of estimate to support the commercial team in pricing, and highlight assumptions, qualifications and risk allowances. • Write the technical volume of the proposal — technical narrative, method statements, design philosophies, deliverables list, execution plan, organisation chart and schedule inputs. • Present and defend the proposed solution in bid clarification meetings and technical presentations with clients and EPC contractors. • Support post-tender negotiation and technical alignment, and lead a structured hand-over of the bid basis to the execution team at contract award. • Support business development with feasibility studies, budgetary proposals, technology comparisons and client technical presentations. TECHNICAL SKILLS, SOFTWARE AND STANDARDS: • Process simulation and hydraulics: HYSYS / UniSim / PRO-II, AFT Fathom, PIPENET or equivalent. • Membrane projection software: WAVE, IMSDesign, ROSA, T…