
Are you fascinated by marine microbes? Are you interested in the dynamics of microalgal communities, and how they are affected by environmental change? Do you like to combine laboratory experiments with molecular methods and fieldwork in polar ecosystems? We have a vacancy for a postdoctoral researcher within the NWO-funded project ‘The key role of mixotrophy in Antarctic Carbon and Sulfur Cycles’ (MACS).
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Are you fascinated by marine microbes? Are you interested in the dynamics of microalgal communities, and how they are affected by environmental change? Do you like to combine laboratory experiments with molecular methods and fieldwork in polar ecosystems? We have a vacancy for a postdoctoral researcher within the NWO-funded project ‘The key role of mixotrophy in Antarctic Carbon and Sulfur Cycles’ (MACS).
The Antarctic seasonal sea-ice zone is rapidly changing, with consequences for the key primary producers: microalgae growing in sea-ice and water. While traditionally regarded as purely photoautotrophic, many of these microalgae likely also feed on other microbes or take up dissolved organic matter. Such a mixotrophic lifestyle might help them to survive the polar night and allow them an early start in the growing season, long before other algae receive sufficient light to pick up growth. Additionally, microalgae contribute to the production of the trace gas dimethylsulfide (DMS) that has an impact on climate via cloud formation. The MACS project aims to understand the role of mixotrophic protists in Antarctic C- and S-cycles. Such mechanistic understanding will help predict how changing ice cover will affect microalgal growth and DMS-production in the future, and whether feedbacks might be expected in a changing climate.

The Antarctic seasonal sea-ice zone is rapidly changing, with consequences for the key primary producers: microalgae growing in sea-ice and water. While traditionally regarded as purely photoautotrophic, many of these microalgae likely also feed on other microbes or take up dissolved organic matter. Such a mixotrophic lifestyle might help them to survive the polar night and allow them an early start in the growing season, long before other algae receive sufficient light to pick up growth. Additionally, microalgae contribute to the production of the trace gas dimethylsulfide (DMS) that has an impact on climate via cloud formation. The MACS project aims to understand the role of mixotrophic protists in Antarctic C- and S-cycles. Such mechanistic understanding will help predict how changing ice cover will affect microalgal growth and DMS-production in the future, and whether feedbacks might be expected in a changing climate.
As a postdoc in the MACS project you will investigate how multiple environmental stressors affect the community composition, physiology, and gene expression of Antarctic microalgae, with a particular focus on their mixotrophic nutrition. You will resolve how mixotrophy contributes to carbon cycling during ice melt in spring and how this contribution depends on environmental conditions. You will perform laboratory experiments and fieldwork in collaboration with two other postdocs within the project.
Tasks and responsibilities:
We are looking for an enthusiastic candidate, who enjoys a combination of laboratory experiments and field studies. You have a keen interest in marine microalgal ecology and are eager to perform research in Antarctica. You are a well-organized team player, but also able to work independently, and enjoy collaboration in an international team.
Your experience and profile:
We offer a temporary employment contract for preferably 38 hours per week for a period of 1 year, with the possibility to the extend the contract for another 15 months upon a positive evaluation of your performance. The preferred starting date is 1 January 2027. For this position the University Job Classification profile Researcher 4 applies.
The gross monthly salary, based on 38 hours per week and dependent on relevant experience, ranges between € 3,706 to € 5,760 (scale 10). In addition, you will receive an 8% holiday allowance and 8.3% year-end allowance.
A favourable tax agreement, the ‘30% ruling’, may apply to non-Dutch applicants.
The Collective Labour Agreement of Universities of the Netherlands is applicable.
Besides the salary and a vibrant and challenging environment at Science Park we offer you multiple fringe benefits:
Are you curious to read more about our extensive package of secondary employment benefits, take a look here.
As a postdoc in the MACS project you will investigate how multiple environmental stressors affect the community composition, physiology, and gene expression of Antarctic microalgae, with a particular focus on their mixotrophic nutrition. You will resolve how mixotrophy contributes to carbon cycling during ice melt in spring and how this contribution depends on environmental conditions. You will perform laboratory experiments and fieldwork in collaboration with two other postdocs within the project.
Tasks and responsibilities:
We are looking for an enthusiastic candidate, who enjoys a combination of laboratory experiments and field studies. You have a keen interest in marine microalgal ecology and are eager to perform research in Antarctica. You are a well-organized team player, but also able to work independently, and enjoy collaboration in an international team.
Your experience and profile:
We offer a temporary employment contract for preferably 38 hours per week for a period of 1 year, with the possibility to the extend the contract for another 15 months upon a positive evaluation of your performance. The preferred starting date is 1 January 2027. For this position the University Job Classification profile Researcher 4 applies.
The gross monthly salary, based on 38 hours per week and dependent on relevant experience, ranges between € 3,706 to € 5,760 (scale 10). In addition, you will receive an 8% holiday allowance and 8.3% year-end allowance.
A favourable tax agreement, the ‘30% ruling’, may apply to non-Dutch applicants.
The Collective Labour Agreement of Universities of the Netherlands is applicable.
Besides the salary and a vibrant and challenging environment at Science Park we offer you multiple fringe benefits:
Are you curious to read more about our extensive package of secondary employment benefits, take a look here.
The Institute for Biodiversity and Ecosystem Dynamics (IBED) is one of eight research institutes of the Faculty of Science at the University of Amsterdam. The research at IBED aims to unravel how ecosystems function in all their complexity, and how they change due to natural processes and human activities. At its core lies an integrated systems approach to study biodiversity, ecosystems and the environment. IBED adopts this systems approach to ecosystems, addressing abiotic (soil and water quality) and biotic factors (ecology and evolution of plants, animals, and microorganisms), and the interplay between those. The IBED vision includes research encompassing experimental and theoretical approaches at a wide variety of temporal and spatial scales, i.e. from molecules and microorganisms to patterns and processes occurring at the global scale. The University of Amsterdam has excellent high performance computing facilities. Furthermore, IBED has a dedicated computational support team with specialized knowledge of bioinformatics, (geo)database management and scientific programming. IBED also works with non-academic partners to deliver transdisciplinary science for society.
The position will be based in the Department of Freshwater and Marine Ecology. The department of Freshwater & Marine Ecology aims to increase our understanding of the biodiversity and dynamics of freshwater and marine ecosystems from the level of molecules and genes to entire ecosystems.
Want to know more about our organisation? Read more about working at the University of Amsterdam.
The Institute for Biodiversity and Ecosystem Dynamics (IBED) is one of eight research institutes of the Faculty of Science at the University of Amsterdam. The research at IBED aims to unravel how ecosystems function in all their complexity, and how they change due to natural processes and human activities. At its core lies an integrated systems approach to study biodiversity, ecosystems and the environment. IBED adopts this systems approach to ecosystems, addressing abiotic (soil and water quality) and biotic factors (ecology and evolution of plants, animals, and microorganisms), and the interplay between those. The IBED vision includes research encompassing experimental and theoretical approaches at a wide variety of temporal and spatial scales, i.e. from molecules and microorganisms to patterns and processes occurring at the global scale. The University of Amsterdam has excellent high performance computing facilities. Furthermore, IBED has a dedicated computational support team with specialized knowledge of bioinformatics, (geo)database management and scientific programming. IBED also works with non-academic partners to deliver transdisciplinary science for society.
The position will be based in the Department of Freshwater and Marine Ecology. The department of Freshwater & Marine Ecology aims to increase our understanding of the biodiversity and dynamics of freshwater and marine ecosystems from the level of molecules and genes to entire ecosystems.
Want to know more about our organisation? Read more about working at the University of Amsterdam.
If you feel the profile fits you, and you are interested in the job, we look forward to receiving your application. You can apply online via the ‘Apply’-button on the vacancy’s webpage. We accept applications until and including 28 September 2026.
Applications should include the following information (all files besides your cv should be submitted in one single pdf file):
Only complete applications received within the response period via the link below will be considered.
A knowledge security check can be part of the selection procedure. (for details: national knowledge security guidelines)
We will invite potential candidates for interviews soon after the closing date. The interviews will be held in the course of October 2026.
Do you have any questions, or do you require additional information? Please contact:
Susanne Wilken, Associate Professor, [email protected], T: +31 20 525 7070.
If you feel the profile fits you, and you are interested in the job, we look forward to receiving your application. You can apply online via the ‘Apply’-button on the vacancy’s webpage. We accept applications until and including 28 September 2026.
Applications should include the following information (all files besides your cv should be submitted in one single pdf file):
Only complete applications received within the response period via the link below will be considered.
A knowledge security check can be part of the selection procedure. (for details: national knowledge security guidelines)
We will invite potential candidates for interviews soon after the closing date. The interviews will be held in the course of October 2026.
Do you have any questions, or do you require additional information? Please contact:
Susanne Wilken, Associate Professor, [email protected], T: +31 20 525 7070.








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