Process Engineering Lead

• Develop design basis documents, mass and energy balances, process flow diagrams, and P&IDs for all projects.
  
• Write control philosophies and define operating sequences, interlock logic, trip conditions, and safety requirements with reference to applicable standards.
  
• Perform combustion and process calculations: stoichiometry, air/fuel ratio, adiabatic flame temperature, flue gas composition, heat release, pressure drop, residence time.
  
• Guide the instrumentation and controls team on BMS architecture, instrument selection, and safety system requirements (SIL targets, SafetyRequirements Specifications).
  
• Participate in HAZOPs — either leading CRA’s internal HAZOP or providing process input to the client/EPC’s HAZOP.
  
• Review mechanical, electrical, and instrumentation outputs for consistency with the design basis.
  
• Support proposals with preliminary sizing, equipment selection, standards references, and technical content.
  
• Travel to project sites (domestic and international) for commissioning support, client meetings, and site surveys.
  

• Combustion chamber sizing: residence time, heat intensity, temperature profile.
  
• Flare radiation calculations (API 521) and stack height determination.
  
• Burner selection and sizing: fuel flexibility, turndown ratio, flame stability.
  
• Emission calculations: NOx, CO, VOC destruction efficiency.
  
• Refractory specification and shell temperature analysis.
  
• BMS safety function definition and SIL target declaration.
  

• Biogas characterisation and variability assessment (CH₄/CO₂/H₂S/moisture).
  
• Gas treatment technology selection and sizing: H₂S removal, dehydration, CO₂ removal (amine, membrane, PSA).
  
• CBG plant process design: compression stages, inter-stage cooling, quality compliance (IS 16087 or applicable standards). 
  

• Compressor sizing: flow, pressure ratio, gas properties, stage count, intercooling.
  
• Driver selection: electric motor vs. gas engine, power calculations, altitude derating.
  
• Skid process design: scrubbers, separators, coolers, control valves, relief devices.
  
• Process datasheets for bought-out equipment (compressors, heat exchangers, vessels).
  

Requirements

• Degree in Chemical Engineering or Mechanical Engineering.
  
• 10+ years of process engineering experience in equipment design, EPC, or a technology company — producing design basis documents, P&IDs, and process calculations as primary deliverables.
  
• Working knowledge of combustion thermodynamics: stoichiometry, air/fuel ratio, flame temperature, flue gas composition, excess air.
  
• Working knowledge of gas processing fundamentals: compression thermodynamics, gas treatment technologies, phase behaviour.
  
• Familiarity with relevant standards: API 521, NFPA 86 or EN 746, ASME/IS codes for pressure equipment.
  
• Ability to produce engineering documents that other disciplines design from.
  

• Experience with biogas or CBG plant process design.
  
• HAZOP participation experience.
  
• Exposure to functional safety concepts: IEC 61511, SIL assessment, LOPA.
  
• Process simulation capability (Aspen HYSYS, ProMax, or similar).
  
• Experience in an equipment OEM environment.
  

Benefits

• Lean, ownership-driven culture — high autonomy, direct access to leadership, and visible impact.
  
• Build and lead the process engineering function as it scales.