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Are you our next creator of change? Do you want to be part of creating solutions for mitigating climate change? Neste is the world’s leading producer of sustainable aviation fuel and renewable diesel, accelerating transformation for a more sustainable future. We are looking for a Senior Process Development Engineer (Wastewater Treatment) to join our Process Technology Development and Modelling department in Porvoo, Finland.

As a Senior Process Development Engineer, you will contribute to enabling new renewable and circular feedstocks to be introduced to refineries and to refinery transformation towards carbon neutral production by providing wastewater treatment substance matter expertise to projects. Our department develops NEXBTL and other renewable and circular feedstock processes and wastewater treatment technologies through R&D and technology development projects. NEXBTL is Neste’s proprietary HVO technology for production of hydrocarbons from renewable oils and fats for fuels, polymers and chemicals. We contribute to projects in their early development phases, from lab scale to feasibility studies and also support Neste’s production sites globally.

Together with you and your expertise, we can make an impact today and keep our promises for tomorrow.

Reasons to join Real impact right now. We create solutions for mitigating climate change and accelerating a shift to a circular economy. We live by our values every day; we care, we have courage, we cooperate.

Safety and caring We value safety always and everywhere. We want our work to feel good and do good. Neste nurtures a culture where everyone is welcome and feels safe, respected and encouraged to be their unique true selves.

Exciting growth Transformation brings new possibilities, fostering both courage and curiosity. As a global company, collaboration is the key, and we believe in flexible, smart ways of working. We support personal development with versatile learning and career opportunities. In addition, our benefits for employees in Finland include a personnel fund as part of the overall remuneration, good occupational health care, and an extensive membership in a sickness or health insurance fund. We also support leisure time activities with benefits for sports and culture. The job is located in Kilpilahti, Porvoo, about 30 minutes by car from Helsinki. We organize free bus transportation to Kilpilahti for employees from the capital region, Porvoo and nearby areas.

More about the job

Your role in our team

• Providing technical substance matter expertise in renewable diesel, renewable jet fuel, and liquefied waste plastic projects
• Creating early phase concepts and heat & material balances as well as early phase process design for wastewater treatment concepts
• Evaluating concept alternatives
• Scoping the wastewater treatment related work together with stakeholders
• Contacting equipment manufacturers
• Supporting operations in test runs
• Supporting projects in definition and execution phases as an expert
• Supporting business units in the decision making

You will work closely with other technology professionals, engineering disciplines, R&D, modelling experts, business stakeholders and other internal/external stakeholders to accomplish Neste’s strategic goals. You will report to Manager, Refining Processes and project managers in matrix in Porvoo.

• M.Sc. or D.Sc. in Chemical Engineering
• 5+ years of relevant industry process design / process development experience
• Deep knowledge of wastewater treatment (WWT) processes and process development and conceptual engineering (including material and heat balance calculations and unit operation specifications)
• Experience of process design activities
• Strong analytical skills, high motivation, commitment and ability to work independently
• Good interpersonal, communication and influencing skills
• Fluent written and spoken English

• Responsible attitude and safety-oriented mindset

• Capability to manage big entities but also understand importance of details
• Understanding operations of WWT
• Hands-on attitude and willingness to learn new things
• Business oriented mindset

We look forward to receiving your CV and application (with a salary request) by 15 October 2025.

If you have any questions regarding the process or the position, please get in touch with Perttu Uotila, Manager, Refining Processes, on 2 October at 13:00-14:00 (EEST) or 7 October at 12:00-13:00 (EEST).

Due to security and confidentiality, please submit your application through our recruitment system. Applications sent via email will not be considered. We will do our best to contact you within 3 weeks after the application time has ended. The recruitment process will include interviews and a possible aptitude assessment. The person selected for the position must pass a health examination including a drug test. A possible security clearance is obtained with your consent.

Neste in brief Neste (NESTE, Nasdaq Helsinki) creates solutions for mitigating climate change and accelerating a shift to a circular economy. The company is the world’s leading producer of sustainable aviation fuel (SAF) and renewable diesel, enabling its customers to reduce their greenhouse gas emissions. Neste refines waste, residues and other renewable raw materials to high-quality renewable fuels at its refineries located on three continents. The company’s annual renewable fuels production capacity will be increased to 6.8 million tons in 2027. Neste has high standards for sustainability and has consistently been recognized by leading sustainability indices. In 2024, Neste\'s revenue stood at EUR 20.6 billion. Read more: neste.com