Commissioning Engineer – Biomethane / CO 2 Liquefaction Competitive Salary (DOE) Travel Allowances & Excellent Benefits International Travel (up to 80%) (UK or Netherlands Based) MC Technical Recruitment is currently recruiting for a Commissioning Engineer to join an international technology business specialising in renewable gas solutions. This role will focus on the commissioning, start-up and optimisation of advanced biomethane upgrading and CO2 liquefaction systems across global projects. This is a fantastic opportunity to work on cutting-edge membrane upgrading technology and NH3 refrigeration systems, supporting the delivery of highly advanced process installations worldwide. As a Commissioning Engineer, you will be responsible for: Carrying out commissioning and start-up activities on renewable gas installations globally Performing cold and hot commissioning, including system verification and readiness checks Starting up and optimising biomethane upgrading and CO2 liquefaction systems Supporting the performance optimisation of NH3 refrigeration processes Executing functional testing and site acceptance (SAT) procedures Analysing process performance, trends and operational data to improve plant efficiency Troubleshooting process, mechanical, electrical and automation-related issues Supporting PLC/HMI commissioning, alarms analysis and control systems diagnostics Assisting with instrumentation calibration and verification Delivering operator training and supporting customer handovers Providing on-site technical support during initial operational phases Other duties as required To be considered for this role, you should have: A qualification in process, mechanical, refrigeration, automation or chemical engineering (or equivalent experience) Minimum 5 years' commissioning experience within industrial/process environments Strong experience with industrial refrigeration systems, ideally NH3 Solid understanding of process engineering and system optimisation Proven ability to troubleshoot PLC/HMI and automation systems Experience working with compressors, refrigeration cycles and process systems Ability to read and interpret P&IDs, electrical drawings and technical documentation Highly desirable: Siemens S7 / TIA Portal knowledge F-Gas, NH3, ATEX or similar certifications The ideal candidate will have: Strong analytical and troubleshooting skills A structured and solution-focused approach Excellent communication and customer-facing abilities The ability to remain calm under pressure A flexible approach with willingness to travel internationally (50–80%) The offer: Competitive basic salary (depending on experience) Excellent travel allowances and international project exposure Opportunity to work on advanced renewable gas technologies Strong career development within a growing international organisation Company benefits package including pension and holidays To apply: If you are interested in this opportunity, please apply via the link below or contact Machaela at MC Technical Recruitment on 01489 533 030 or for a confidential chat.