Process Commissioning Engineer
First seen by Alion on Oct 9, 2026.
Are you a process‑driven commissioning professional with a strong interest in biological systems and operational optimization? Join WTT as our Process Commissioning Engineer and play a key role in bringing our composting and anaerobic digestion facilities successfully into operation worldwide.
At WTT, we build high-tech installations all over the world to process organic waste.
Your Role
As Process Commissioning Engineer, you are responsible for the full commissioning lifecycle of WTT composting and anaerobic digestion facilities. This role goes beyond traditional commissioning activities such as PLC or electrical checks and focuses strongly on hot commissioning, biological performance, mass balance validation, and process optimisation. In this role you’ll be responsible for:
- Leading full commissioning sequences of composting and AD facilities.
- Validating plant performance against mass balance calculations and process design intent.
- Monitoring biological development, temperature profiles, aeration, moisture levels, and throughput.
- Diagnosing and resolving process deviations such as insufficient aeration, heat loss, or moisture imbalance.
- Reading, interpreting, and verifying P&ID diagrams and identify discrepancies between design and reality.
- Performing on site sampling of compost and biomass and interpret laboratory results (e.g. moisture, ODS, AT4, Rottegrad, C/N balance).
- Translating sampling and process data into operational adjustments.
- Supporting and training plant operators during start up and transition to full operation.
- Providing structured commissioning reports and feed lessons learned back into Process Engineering and Sales Engineering.
- Collaborating closely with Process Engineers, Process Performance Analysts, Customer Support Engineers, and site operators.
You will work independently on site with remote support and report to the Manager Services and Project Manager, with a functional line to Process Engineering.
What do we expect from you?
- A completed Bachelor’s or Master’s degree in Process Engineering, Mechanical Engineering, Chemical Technology, or a related field.
- Strong understanding of aerobic and anaerobic processes, biological degradation, mass balances, aeration, and heat and moisture transfer.
- Ability to read and interpret P&IDs (ability to correct them is an advantage).
- Experience interpreting industrial process data via SCADA systems (no programming required).
- Fluency in English and Dutch; German is an asset.
- Willingness to travel internationally (approximately 60–80% during commissioning phases).
- Ability to interpret laboratory results and link them to operational performance.
- Strong analytical and problem‑solving skills.
- A hands‑on, process‑oriented mindset with a strong sense of ownership.
- Clear communication skills and confidence working with operators and engineering teams.
What We Offer?
At WTT you will work in a collegial, informal and pleasant environment. We offer:
- A full-time position for 40 hours per week.
- A competitive monthly salary of EUR 3,500-4,800 based on experience.
- 30 vacation days with the opportunity to buy up to 40 days.
- Good employment conditions, including a profit-sharing scheme.
- An enthusiastic team and enjoyable company outings.
- Plenty of room for your own input and personal development.
- The opportunity to make a meaningful impact in a growing global organization.
Working at WTT
We are an employer who thinks along with you, with colleagues who are always there for you. We are a close-knit team that enthusiastically designs, builds and maintains innovative organic waste treatment installations worldwide! We give you the chance to truly make an impact while being part of a warm, collegial work environment.
At WTT, it’s not just about work. We value enjoyment and connection just as much. That’s why you can play darts or table football in our canteen, enjoy a delicious Monday lunch, and join in on sporting and social activities. Hybrid working is possible, but there is always a place for you at the office.
We are true specialists in organic waste, and innovation is in our DNA. Within WTT you have the space to develop yourself and grow. Your job satisfaction and personal development are our priority.