Postdoctoral Fellow in Geochemistry (Stockholm University)

Department: Environmental Science, Faculty of Science Location: Stockholm, Sweden Employment Type: Full-time, Temporary Position Contract Duration: Minimum 2 years, maximum 3 years (possibility of extension under special circumstances) Start Date: 1 December 2025 or as per agreement Reference Number: SU FV-3285-25 Application Deadline: 31 December 2025 About the Department The Department of Environmental Science is one of the largest departments at the Faculty of Science, comprising four units with more than 170 researchers, teachers, doctoral students, and technical/administrative staff from over 30 countries. Research and teaching focus on chemical contaminants, atmospheric science, biogeochemistry, and (eco)toxicology. Employees work in a dynamic, internationally recognized environment with leading research areas. More information about the department can be found on the Department of Environmental Science website. Project Description The Canadian Beaufort Sea shelf provides an ideal region to study the effects of sea-level rise and freshwater input on Holocene primary productivity, sea-ice cover, and ocean acidification. Similarly, shallow lakes in the Mackenzie region (Northwest Territories, Canada) are experiencing climatic disturbances, such as rising winter air temperatures, altered timing of spring freshets, and decreased precipitation. Research questions may also include shifting methane dynamics in a changing Arctic. Main Responsibilities Extracting and analyzing biomarkers from Canadian Arctic samples. Working with samples from previous expeditions (Warm COCOA, FLO CHAR, PeCaBeau) and potentially joining new expeditions to target specific samples. Conducting intensive laboratory work using gas-chromatographic and stable isotope methods (GC, GC-IRMS, GC-MS). Developing novel biomarker methods, such as: Bacteriohopanpolyol (BHP) analysis Levoglucosan concentration in marine and lake sediments Hydrogen isotope ratios of sterols and alkenones Carbon isotope ratios of GDGT Compound-specific radiocarbon analysis Research spanning modern environmental questions to paleoclimate reconstructions. Qualification Requirements PhD in organic geochemistry, environmental sciences, geoscience, chemistry, or a related discipline Degree must be completed no later than the time of the employment decision Preference for candidates whose degree was completed within the last three years, though special circumstances (e.g., parental leave, sick leave, clinical attachment) may be considered Assessment Criteria Flexibility and motivation to grow within a new research group Interest in paleoclimatology and aquatic geochemistry Experience with organic compound analysis is preferred Ability to work in an interdisciplinary international team Good communication skills, including fluency in English Selection based on statement of scientific interest, publications, references, and interview Employment Conditions Full-time employment for 2–3 years Start date 1 December 2025 or as per agreement Work in a dynamic international environment Stockholm University is located in the National City Park with excellent transport connections Workplace free from discrimination and promotes equal opportunities Contact For further information about the position: Julie Lattaud – julie.lattaud@aces.su.se Application Apply through Stockholm University's recruitment system Attach a personal letter, CV, and requested supporting documents Ensure the application is complete before the deadline Instructions for applicants: How to apply for a position Stockholm University contributes to a sustainable democratic society through knowledge, enlightenment, and the pursuit of truth. Union Representatives: ST/OFR: st@st.su.se Saco-S: saco@saco.su.se Seko: seko@seko.su.se If you apply for this position please say you saw it on Physicaloxy

Department: Environmental Science, Faculty of Science
Location: Stockholm, Sweden
Employment Type: Full-time, Temporary Position
Contract Duration: Minimum 2 years, maximum 3 years (possibility of extension under special circumstances)
Start Date: 1 December 2025 or as per agreement
Reference Number: SU FV-3285-25
Application Deadline: 31 December 2025

About the Department

The Department of Environmental Science is one of the largest departments at the Faculty of Science, comprising four units with more than 170 researchers, teachers, doctoral students, and technical/administrative staff from over 30 countries. Research and teaching focus on chemical contaminants, atmospheric science, biogeochemistry, and (eco)toxicology. Employees work in a dynamic, internationally recognized environment with leading research areas.

More information about the department can be found on the Department of Environmental Science website.

Project Description

The Canadian Beaufort Sea shelf provides an ideal region to study the effects of sea-level rise and freshwater input on Holocene primary productivity, sea-ice cover, and ocean acidification. Similarly, shallow lakes in the Mackenzie region (Northwest Territories, Canada) are experiencing climatic disturbances, such as rising winter air temperatures, altered timing of spring freshets, and decreased precipitation. Research questions may also include shifting methane dynamics in a changing Arctic.

Main Responsibilities

Extracting and analyzing biomarkers from Canadian Arctic samples.
Working with samples from previous expeditions (Warm COCOA, FLO CHAR, PeCaBeau) and potentially joining new expeditions to target specific samples.
Conducting intensive laboratory work using gas-chromatographic and stable isotope methods (GC, GC-IRMS, GC-MS).
Developing novel biomarker methods, such as:
- Bacteriohopanpolyol (BHP) analysis
- Levoglucosan concentration in marine and lake sediments
- Hydrogen isotope ratios of sterols and alkenones
- Carbon isotope ratios of GDGT
- Compound-specific radiocarbon analysis
Research spanning modern environmental questions to paleoclimate reconstructions.

Qualification Requirements

PhD in organic geochemistry, environmental sciences, geoscience, chemistry, or a related discipline
Degree must be completed no later than the time of the employment decision
Preference for candidates whose degree was completed within the last three years, though special circumstances (e.g., parental leave, sick leave, clinical attachment) may be considered

Assessment Criteria

Flexibility and motivation to grow within a new research group
Interest in paleoclimatology and aquatic geochemistry
Experience with organic compound analysis is preferred
Ability to work in an interdisciplinary international team
Good communication skills, including fluency in English
Selection based on statement of scientific interest, publications, references, and interview

Employment Conditions

Full-time employment for 2–3 years
Start date 1 December 2025 or as per agreement
Work in a dynamic international environment
Stockholm University is located in the National City Park with excellent transport connections
Workplace free from discrimination and promotes equal opportunities