JETZON jobs and PhDs

(1/7) Post-doc position: Southern Ocean carbon export fluxes estimated from space, Caltech, USA

The position will remain open until filled, although a start in summer or early fall 2026 is preferred.

The transfer of carbon from the surface to the deep ocean largely occurs through the sinking of particulate matter. However, in certain locations, strong vertical ocean currents also carry organic carbon away from the surface, a process known as the ocean’s mixing pump. Estimates suggest that the mixing pump accounts for up to 50% of the total carbon export from the surface in energetic 
regions, like the Southern Ocean.

This project will leverage data collected from NASA’s SWOT and PACE satellite missions to study the Southern Ocean mixing pump. The SWOT mission provides sea surface height measurements at kilometer-scale resolution with opportunities to estimate vertical ocean velocities. The PACE mission measures the intensity of light at fine resolution (5 nm), which permits an assessment of community composition and its evolution over a seasonal cycle.

This project aims to produce a quantitative, large-scale assessment of the mixing component of the ocean’s biological pump in the Southern Ocean. The study will evaluate the ocean features and physical processes that shape the mixing pump to understand future changes to this component of total carbon export. This is a collaborative project between Caltech and the Scripps Institution of Oceanography, with opportunities to work with Andy Thompson, Christen Frankenburg, Lia Siegelman, and other faculty at 
both institutions.

Minimum qualifications:

  • PhD in the earth sciences, data science, applied mathematics, or other related field;
  • Excellent written and oral communication skills as demonstrated through a track record of publications 
    and presentations;
  • Ability to pursue research independently and as part of a collaborative team.

Preferred qualifications:

  • Experience analyzing large data sets or using machine learning techniques;
  • Prior research experience in submesoscale dynamics and/or biogeochemical cycling

This is a 2-year postdoctoral position (with initial appointment for 1 year with a second year pending good progress). 

To apply please submit a cover letter (explaining interest and relevant qualifications), CV (including list of publications), and contact information for up to three references by email to Andy Thompson (andrewt@caltech.edu). References will only be contacted for shortlisted candidates. A Group Resources and Expectations Guide is provided at (https://web.gps.caltech.edu/~andrewt/). Questions about the project may be directed to Andy Thompson (andrew@caltech.edu) or Lia Siegelman (lsiegelman@ucsd.edu)

 

(2/7) Postdoctoral Research Associate position, Brown University, Division of Applied Mathematics, USA

Consideration of applications will begin on April 1, 2026.

The Division of Applied Mathematics seeks applications for a Postdoctoral Research Associate position. We are particularly interested in postdoctoral researchers who will strengthen and build collaborations between the Division of Applied Mathematics and the climate sciences, brain science, and/or computer science. This will be a two-year, non-tenured, and non-renewable appointment, with a start date of July 1, 2026. Candidates are required to have received a Ph.D. degree or equivalent by the start of this appointment and may have up to three years of prior academic and/or postdoctoral research experience. Applicants should have strong research potential, and their field of research should be consistent with the current research interests of the departmental faculty, as well as a specified potential collaboration with the climate sciences, brain science, and/or computer science. To see full details and to apply, please visit https://www.mathjobs.org/jobs/list/28263. 

 

(3/7) 4 four postdoctoral fellowships within the framework of the ICM, Spain

Deadline 12 April

The call is open for four postdoctoral fellowships within the framework of the ICM Research Hubs that are being promoted as part of the strategic plan of the Severo Ochoa Accreditation.

Call guidelines are available on the ICM website: https://www.icm.csic.es/en/calls/call-four-postdoc-fellowships-our-rese…

We offer four contracts (one per hub) of 2.5 years to develop interdisciplinary research ideas framed within one of the ten proposed research topics.

 

(4/7) Post-doc position: Zooplankton and Fish at the Bermuda Atlantic Time-series Study, BIOS

Applications will be reviewed starting April 30, 2026, and applications will be accepted until the position is filled.

The Maas lab at the ASU Bermuda Institute of Ocean Sciences invites applications for a Postdoctoral Scientist to participate in the BIOS-SCOPE project to explore the role of zooplankton and mesopelagic fish in the biological pump and microbial food webs in the Sargasso Sea. The successful applicant would be responsible for taking advantage of a wide array of imaging (distributional) datasets, access to ship time to conduct physiological experiments, and the analytical tools at ASU BIOS to detail the role of metazoans on DOC and POC fluxes in the region.

The position is part of a large and exciting collaboration with researchers from around the world who are leveraging the BATS time series, as well as cutting-edge technologies, to study the collective metabolism of the planktonic community and determine the mechanisms by which they play a vital role in governing global biogeochemical cycles. The post-doc will be integrated into the group lead by PIs Amy Maas and Leocadio Blanco-Bercial, whose focus is on eukaryotic plankton ecology, evolution, and biogeochemical cycling. This is a dynamic group with several federally-funded grants, six graduate students, three research assistants, two postdocs (one on site) and various undergraduate students. 

Minimum Requirements

  • PhD in biology, oceanography, or a closely related field.
  • Basic knowledge of metazoan physiology, ocean biogeochemical cycling and plankton food web dynamics.
  • Ability to participate in several short oceanographic cruises per year (from ASU BIOS).
  • Ability to collaborate effectively in a team environment.
  • Excellent written and oral communication skills.
  • Publications in peer-reviewed journals related to the minimum qualifications.
  • Ability to pursue research independently.

The position is for 12 months, with a possibility of extension based on performance. Salary includes a generous benefits package. Due to the nature and obligations of the job, place of residence will be Bermuda. Ideally the postdoc would begin in Fall 2027. In addition to research training, ASU BIOS offers professional development and career training opportunities to ensure postdocs achieve the highest level of academic and research excellence. The postdoc will be encouraged to apply for independent funding as a principal or co-principal investigator.

To apply please submit electronically, a cover letter, detailed curriculum vitae, the contact details of two references, and a 2-page (Times New Roman 12, single spaced) statement of past research and future plans. The applicant package should be emailed to bios.hr@bios.asu.edu; amy.maas@asu.edu and leocadio@asu.edu (please reference the job title in the subject line of your email).

https://bios.asu.edu/careers

 

(5/7) Teaching Professorship in Ocean Futures, Arizona State University, USA

Deadline May 2

The School of Ocean Futures (SOF) in the Rob Walton College of Global Futures (CGF) at Arizona State University invites applications for one full-time, benefit-eligible, academic year (9-month) Teaching Professor position in Ocean Futures with an anticipated start in Fall 2026.

This appointment is non-tenure track and will be made at the rank of Teaching Assistant Professor or Teaching Associate Professor, commensurate with the candidate’s experience and accomplishments. This appointment is for one academic year, and subsequent academic year renewals are contingent contingent upon satisfactory performance, availability of resources, and the needs of the school.

Applicants should have experience in college- or university-level teaching and student mentoring and be able to teach introductory-level Ocean Futures, marine biology, and ocean conservation courses to Ocean Futures majors, as well as to non-major students taking these classes to meet ASU’s General Education Sustainability Requirement.

Ideally, applicants will also have some research and/or professional experience in the field of Ocean Futures, for example oceanography, coastal planning, marine education, etc., as they will also be expected to co-teach the Ocean Futures Capstone course, in which undergraduate majors and master’s students work in teams on real problems with real partners.

Areas of interest or expertise within Ocean Futures are open, including (but not limited to) marine environmental science or marine ecology, marine environmental policy, marine energy systems or other infrastructure, fishing or marine food systems, coastal urbanism/planning, and blue economies.

Further details can be found here: https://apply.interfolio.com/182743

 

(6/7) PhD opportunity: Cellular processes of biogeochemical matter transformation in planktonic rhizarians, LOG, France

Deadline 1 June

This PhD position is part of the 4-years ChoRhiSO project (Characterisation of Rhizaria in the Southern Ocean) led by Tristan Biard. ChoRhiSO aims to characterize the contribution of siliceous Rhizaria, to marine biogeochemical cycles (in particular the carbon biological pump and silica cycle) of the Southern Ocean.

Application Requirements: 

Interested candidates should send an email to both supervisors (tristan.biard@univ-littoral.fr and meilland@cerege.fr) by 1st June 2026 with the subject line: PhDChoRhiSO, and include the following:
• Cover letter of 1 or 2 pages (with a brief summary of the candidate’s academic and research 
experiences and goals).
• CV (including several references).

Required skills: 

We are looking for a bright, curious, and highly motivated PhD candidate holding a MSc in a relevant topic (e.g., marine biology-ecology, biological oceanography, biochemistry, cellular biology). The candidate should be interested in laboratory work and be able to perform data analysis (R, or Python) at an intermediate level. A willingness to spend extended periods of time during field trips, including a ~50-day cruise in the Southern Ocean (Year 2), is necessary, such as proficiency in written and spoken English. We expect the candidate to have a high degree of independence, experience in conducting field and laboratory experiments, and the ability to work in an interdisciplinary, international research group. 
     The PhD candidate will have the opportunity to join (at least one) an international expedition onboard the R.V. Marion Dufresnes (January-March 2028), allowing them to acquire a unique field work experience and meet foreign researchers. The candidate will be part of the ChoRhiSO consortium and will interact with multiple researchers (including several PhD students and postdoctoral 
researchers) in the host laboratory, creating a dynamic environment for personal development. The candidate will learn from interdisciplinary discussion with a strong emphasis on critical thinking and will receive a multidisciplinary training, ranging from biological oceanography, biogeochemistry, ecology, and big-data analysis.
 

Duration: The PhD position is for 3 years. Start date: October 1, 2026. 


Supervision: 

The PhD candidate will be supervised by Dr. Tristan Biard (LOG, Wimereux) and Dr. Julie Meilland (CEREGE, Aix-en-Provence). Dr. Tristan Biard is the PI of the ChoRhiSO project and a recent recipient of an ERC-Consolidator grant (also on Rhizaria). He is a world-leading expert on Rhizaria. J. Meilland is a renowned expert on planktonic Foraminifera and has unlocked the longthought-unbreakable mystery of Foraminifera cultivation. 
 

Location: 

The position will be based at the Laboratoire d’Océanologie et Géosciences (LOG), Wimereux, France. It is a joint research unit of the University of the Litoral Opal Coast, the University of Lille, and the Centre National de la Recherche Scientifique. It is renowned in the fields of zoo- and phytoplankton ecology/physiology, microbial ecology, biogeochemistry, marine optics, physical oceanography, and geosciences. The position will include numerous visits (sometimes for extendedperiods) to Aix-en-Provence (France) as well as several field-trips (at least 5) on the French Riviera (Nice, Marseille, etc.).
 

Hours and Compensation: 

The PhD candidate will be given a fully equipped workstation at the 
LOG, and will be expected to work full-time for a duration of 36 months, starting in October 2026. 
The minimum monthly remuneration under the contract shall be ~€1,800 (after taxes).
 

(7/7) PhD Candidate in Biological Oceanography: Zooplankton and its role in the carbon pump, NTNU, Norway

A PhD position, fully funded for three years, is available at the Department of Biology of the Norwegian University of Science and Technology (NTNU), Trondheim.

More information and how to apply:

https://www.jobbnorge.no/en/available-jobs/job/296793/phd-candidate-in-…

We invite applications for a PhD candidate to join an interdisciplinary research project focused on zooplankton ecology and its role in the oceanic biological carbon pump under the supervision of Associate Professor Jose Landeira and co-supervisor Associate Professor Kang Nian Yap . Oceans have sequestered approximately 30–50% of anthropogenic CO₂ since the beginning of the industrial revolution, mitigating the rise in atmospheric CO2 and, consequently, global warming. However, the mechanisms through which carbon is transported into the deep ocean remain poorly understood.

The project will investigate how zooplankton contributes to carbon sequestration through vertical migrations, using a combination of optical and acoustic instruments to observe and quantify their dynamics in the water column. A key objective is the development and improvement of physiological proxies and endpoints to better estimate zooplankton respiration and its impact on oceanic carbon fluxes. The position offers training in field observations, advanced instrumentation, experiments with zooplankton organisms and physiological analyses within an international research environment. This position will contribute to the strategic program Polhavet 2050.

Are you motivated to take a step towards a doctorate and open up exciting career opportunities? As a PhD Candidate with us, you will work to achieve your doctorate, and at the same time gain valuable experience that qualifies you for a further career in higher education and research, in and outside academia.

Your immediate leader will be the Head of Department.