Experienced Scientist Source Apportionment of atmospheric pollutant concentrations | Utrecht

Contributing to tomorrow’s world. Envision it. Become Scientist Source Apportionment at TNO in Utrecht.

We are looking for a scientist with expertise in air pollution modelling. Do you have a special interest in attributing pollutants and their negative health impact to their source of origin using chemical transport models? Come join our team at TNO’s Air Quality & Emissions Research.

Our research portfolio is increasing on nitrogen, particulate matter and ozone monitoring and their source apportionment to help governments make informed and efficient legislative decisions. The capabilities to trace pollutants back to their source of origin in chemical transport models provide a unique opportunity to determine the effect of emission reductions and effectiveness of abatement strategies aimed at improving air quality and thereby the health of the population. At TNO simulations are performed on a daily basis to determine the countries and sectors of origin for pollution in the atmosphere, that are displayed on TOPAS - Air Quality Modeling TOPAS (dashboard) (tno.nl) and TOPAS-NL website and are included in the European Copernicus Atmosphere Monitoring Service (CAMS) policy support service. As Scientist Source Apportionment you will further develop and apply these modeling tools to meet societal challenges and help get a grip on leading causes of air pollution.

The AER (Air Quality & Emissions Research) Expertise Group analyses the impact of human activity on the environment and human health and is part of the Energy and Material Transition Unit.
The group has at its disposal data from state-of-the-art equipment (satellites and measurement networks on the ground) as well as numerical models (e.g. LOTOS-EUROS), which make it possible to calculate and trace the composition, origin and expected distribution of a wide range of substances in the air – such as particulate matter, ammonia, nitrogen-dioxide, ozone, etc. – and to reach verdicts on air quality (anywhere in the world). AER also has the requisite expertise to assist government policymakers and decision-makers in the private sector when it comes to transitioning to a more sustainable, cleaner and socioeconomically more desirable economy. Our areas of focus and hence our staff are at the heart of debate in society.

More information about our research and models Air Quality & Emissions Research.

You are passionate about working with atmospheric models and large datasets. Moreover, you are eager to contribute to solving societal relevant environmental problems, just like the rest of our team. You are not afraid to ask critical questions and are a real team player. You bring your own network and are able to expand it by representing TNO as expert on source attribution and contributing to discussions on the topic within several international networks.

You also have the following to offer:

• A PhD or Master in Meteorology, Earth sciences, Mathematics, Physics or a similar field and several years of relevant work experience.
• 7 years of working experience (including PhD years) with atmospheric modeling (LOTOS-EUROS or a similar chemical transport model).
• Expertise on model intercomparisons, model evaluations and atmospheric chemistry.
• Strong programming skills (Python, Fortran, and/or similar).
• Excellent level of written and spoken English.
• Motivated to learn the Dutch language in reading and speaking.

Challenging and varied work with a real impact. And plenty of opportunities as, at TNO, you are in charge of shaping your career. We offer a gross monthly salary between € 4.500 and € 7.000 (based on your knowledge and experience), 8% holiday pay, a 13th month bonus of 8.33% and a flex budget (5.58% + € 180). In addition, you will be given every opportunity to develop yourself.

TNO offers optional employee benefits, enabling you to tailor your benefits package to match your personal situation. You may also expect:

• An extremely professional, innovative working environment where colleagues are leading experts in their field.
• The opportunity to attend courses, workshops and conferences, and to receive training and coaching based on your needs.
• 34 days annual leave on a full-time basis.
• An employer that values and encourages diverse talent, with initiatives like the Female Leadership Program, our Rainbow Community and round tables on inclusion topics.
• We offer a comprehensive and flexible mobility plan that also includes full compensation for public transportation for commuting and business travel.
• Great social events with your team and other TNO colleagues. That’s how you will get to know a lot of people really quickly.
• Flexible working hours, the possibility to work parttime (32 of 36 hours) and the possibility of working from home.
• A good pension scheme.

Read more about tailoring your benefits package.

At TNO, we innovate for a healthier, safer and more sustainable life. And for a strong economy. Since 1932, we have been making knowledge and technology available for the common good. We find each other in wonder and ingenuity. We are driven to push boundaries. There is all the space and support for your talent and ambition. You work with people who will challenge you: who inspire you and want to learn from you. Our state-of-the-art facilities are there to realize your vision. What you do at TNO matters: impact makes the difference. Because with every innovation you contribute to tomorrow’s world. Read more about TNO as an employer.

At TNO we encourage an inclusive work environment, where you can be yourself. Whatever your story and whatever unique qualities you bring to the table. It is by combining our unique strengths and perspectives that we are able to develop innovations that make a real difference in society. Want to know more? Read what steps we are taking in the area of diversity, equity and inclusion.

Please apply before the 7th of April, 2026. The selection process comprises two interview rounds. We aim to finalize the entire process within four weeks.

The selection process may include an online assessment and a reference check.

A certificate of Conduct (VOG) is required before starting a new job at TNO.