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Postdoc in benthic invertebrate biotransformation of hydrophobic contaminants

Department of Science and Environment (DSE), Roskilde University, invites applications for a position as postdoc in benthic invertebrate biotransformation of sediment-associated siloxanes from March 1st, 2018, or as soon as possible thereafter. The position as postdoc is limited to a period of 1 year.

The successful candidate will be affiliated with the Environmental Dynamics research group at DSE. The Environmental Dynamics research group has teaching and research activities within environmental biology, natural geography and environmental risk. The postdoc will become part of the Siloxane biotransformation project, which is funded by Centre Européen des Silicones (CES). The overall aim of this project is to experimentally examine the role of benthic invertebrate biotransformation of cyclic siloxanes in estuarine and freshwater systems using the oligochaete worm, Tubifex tubifex and the estuarine polychaete, Capitella teleta, as a model system. More specifically, the project is focused on examining uptake, biotransformation and elimination of sediment-associated C14-labelled siloxanes in aquatic organisms. This part of the project will be centered on dodecamethylcyclohexasiloxane (D6, CAS #540-97-6).

Responsibilities and tasks
The postdoc’s duties will include research within uptake, biotransformation and depuration of C14-labelled D6 in the two model organisms. Overall the postdoc project is divided into three parts:

The successful candidate is expected to:

  • Test and optimize D6 sediment spiking- and extraction (water, sediment, tissue) procedures.
  • Perform screening tests: Using non-labelled D6, the aim of this part is to assess bioavailability and uptake of sediment-associated D6 in the two model organisms. This information feed into part three.
  • Examine D6 biotransformation kinetics in in the two model organisms following uptake-(e.g., 28 day) and depuration (e.g., 10 days). Biotransformation will be assessed following already developed methods determining phase I and II D6 metabolites.

Applicants must hold a PhD or equivalent within aquatic ecotoxicology. Practical laboratory skills within sediment ecotoxicology and chemical analyses and statistical data treatment are necessary.

The successful applicant should furthermore have experience within:
  • Sediment ecotoxicology of hydrophobic organic contaminants
  • Benthic invertebrate biology
  • Biotransformation assessment
  • Strong practical and analytical skills
  • Publishing in international peer-reviewed journals

You are also required to be enterprising and to possess good interpersonal skills and to be a visible, active participant in the department’s daily activities, in addition to being willing to engage in disciplinary and interdisciplinary collaboration across the department.

In the assessment of the candidates, consideration will be given to;
  • scientific production and research potential,
  • the ability to promote and utilize research results,
  • an all-round experience basis, preferably including international experience,

Roskilde University
At RUC we cultivate a project and problem oriented approach to knowledge creation, because we believe that the most relevant results are obtained by solving real problems in collaboration with others. We employ an interdisciplinary approach because no major problems are ever resolved on the basis of any single academic discipline alone. We also cultivate transparency, because we passionately believe that participation and knowledge-sharing are prerequisites for freedom of thought, democracy, tolerance and development.

For further information about the postdoc, please contact Professor Henriette Selck on tel. (+45) 4674 2983 or email

Terms of employment
The employment is on full time, and you will refer to Head of the Department Susanne Sørensen, e-mail

The position will be filled according to the Agreement between the Danish Ministry of Finance and the Danish Confederation of Professional Associations (AC) and Job Structure for Academic Staff at Universities.

Read more about the recruitment process at Roskilde University here (

To apply for the position: Go to Roskilde University’s website. Click the 'Search Position' button in the job posting.

Only applications in English are accepted.

Applications must include:
  • Cover letter
  • CV
  • Documentation of education
  • A complete list of publications
  • A maximum of 5 relevant scientific works that you want included in the assessment. If any of the publications that you want included in the assessment are the result of a joint effort, the extent and the nature of your contribution to each individual work must then be clarified in a co-author statement (find template here:
  • If duties include teaching: Teaching portfolio (read more about teaching portfolio at Roskilde University here (

Please submit your application no later than february 23. th 2018.
Material received after this date will not be taken into consideration.

Roskilde University wishes to reflect the diversity of society and welcomes applications from all qualified candidates regardless of personal background.

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