Seasonal Data Assimilation Jobs (NOW HIRING)

Visa Sponsored Job:

Yes

Relocation Assistance Eligible:

Yes

Job Location:

Boulder, Colorado

Position Type:

Full time, Term - 6 months or more (Fixed Term)

$82,650

*Final salary and rates are based on education, experience, and skills relevant to the role.*

Job Description SummaryWe are pleased to announce the call for applications for the 36th cohort of Climate and Global Change Postdoctoral (C&GC) Fellowship program.
The Fellowship program has an outstanding reputation for attracting the best and brightest PhDs in the sciences and for training future leaders in Climate and Global Change Science. The C&GC Postdoctoral Fellowship Program is seeking applications from across the full breadth of disciplines contributing to Climate and Global Change Science.
Innovative research within and across disciplines spanning the spectrum of physical, social, and integrated sciences is needed to better understand, predict, plan for, and manage the Earth System and its interactions in a changing climate, as well as how communities experience and are affected by these changes, and how society will pursue low-carbon pathways for a secure and sustainable future. Each appointed Fellow is hosted by a mentoring scientist at a U.S. University, Research Institution, or Federal Agency to work in an innovative climate-related research area of mutual interest, advancing the fundamental science and our understanding of climate-related issues.
Climate and Global Change Postdoctoral Fellows focus on advancing Climate and Global Change Science. This includes research that advances our understanding of the Earth system (e.g., climate, freshwater, ocean, carbon and other biogeochemical cycles), energy, and decarbonization processes. Examples include but are not limited to: observing, understanding, modeling, and predicting climate variability, change, and impacts on seasonal and longer time scales; documenting and analyzing past, current, or possible future climate variability and change; enhancing Earth system model development through improved process representation, novel observational constraints, innovative data assimilation and statistical methods, systematic calibration, evaluation and uncertainty characterization; advancing data assimilation of both atmospheric and terrestrial freshwater processes in order to inform and improve human use of freshwater consumption with high fidelity within global Earth system models and data products; studying the underlying Earth Systems processes, including physical-, chemical-, biological-, biogeochemical-, and coupled human-Earth systems processes, and/or their interactions. In this context, coupled human-Earth system dynamics encompass the mechanisms by which biogeophysical feedbacks and extreme events constrain decarbonization trajectories, institutional decision-making frameworks, and pathways toward climate-resilient, sustainable, and equitable societies. Applications may focus on one discipline or be interdisciplinary, integrating across disciplines.
C&GC Fellows are UCAR employees and receive a fixed annual salary, plus UCAR's benefits and allowances for relocation, travel, and publications. Job Description

Application Deadline: This position will be posted until 11:59 p.m. MT, October 16, 2026. Applications will not be accepted past this date.

Required application materials (compiled into a single (1) PDF):

• Application Questionnaire (answered within the online application)
  Ensure you have the names and contact information of your professional reference letter writers handy (Note: you must provide TWO references - one of which may be your PhD advisor), as you must provide it during the application process.

• Full Application Packet
  Please refer to the Required Application Documents below for a complete list of required materials.

Background checks are conducted for candidates selected for hire. Learn more.

Work Location: This position is open to anyone seeking in-person research opportunities at any U.S. Universities, Research Institutions, or Federal Agencies, and is not available for remote work. Regardless of flexible work arrangements, UCAR requires ALL positions to be performed within the U.S., excluding U.S. Territories.

Length of Position: 2-year term position. Successful applicants in this program work under the mentorship of host scientists in areas of mutual interest.

What You Will Do

Here is a brief outline of what one would expect to be responsible for in this role.

Key Responsibilities

Climate & Global Change Postdoctoral Fellows will:

• Focus on advancing Climate and Global Change Science. This includes research that advances our understanding of the Earth system (e.g., climate, freshwater, ocean, carbon and other biogeochemical cycles), energy, and decarbonization processes.

• Conduct independent or collaborative research in accordance with a proposed plan aligned with the goals of the program.

• Publish and present research results at seminars and conferences.

• Pursue outside activities that advance professional growth, such as contributing to educational programs, serving on committees, and attending workshops.

• Participate in monthly networking telecoms with other Fellows, focusing on professional development and science.

Who We'd Love To Join Our Team

Successful candidates will ensure their application materials speak to the following criteria:

Education & Experience

• PhD degree related to climate or global change research.

  • Preference is given to those who are seeking their first fellowship and have held a PhD for no more than three (3) years from the application deadline.

  • Applicants must have a PhD degree granted in an area related to climate research, or must be able to complete such a degree and finish all thesis revisions and defense by June 2027.

• Awardees must change institutions.

  • Only in compelling circumstances will this requirement be waived.

Knowledge, Skills, and Abilities

• Ability to work independently and conduct research with minimal supervision.

• Skill in oral and written communication.

APPLICATION INSTRUCTIONS

STEP 1. Prepare, collect, and organize the documents in the order listed below, then combine them into one (1) PDF. See How To Combine Files into One PDF and/or How To Combine PDFs into One File for help.

STEP 2. Submit your application through Workday, including attaching/uploading your Application Documents from Step 1.

APPLICATION DOCUMENTS

Please prepare your application into one (1) PDF document, including all of the following documents, in the order listed below:

1) Personal Statement (2-page limit, 12 pt. type size) addressing the questions below:

• Why are you specifically interested in a C&GC Postdoctoral Fellowship?

• How did you demonstrate leadership and service in your community, and how would you bring and grow this experience during a C&GC Fellowship?

• Please also add a justification statement, if applicable, to explain any breaks in your career path.

2) Resume/Curriculum Vitae, including a list of publications. For all publications that are not yet published, please indicate the stage the paper is at, i.e., In Development, Submitted, Under Review, or Accepted.

3) Research Proposal (Must be titled, 5-page limit, 12 pt. type size) including figures and appendices.

• Research Proposals must describe an actual, novel research project.

• Research Proposals must be original to the applicant and cannot be derived from a previously funded proposal from another funding agency.

• Research Proposals must address the broader impact of your research on the community at large.

NOTE: Bibliography/Citations/Literature References are EXCLUDED from this 5-page limit.

4) Host Institution Materials

The following documents are needed from the Host(s) with whom you intend to work. Applicants are responsible for collecting these materials from their Host(s) and must submit these documents as part of the application packet. If you intend to have Co-Hosts, the Letter of Intent should be co-written by both Hosts. We require separate documents for the remaining host material (Resumes, Mentoring Plans, and Current and Pending Research Support) from each co-host.

• Letter of Intent - in the case of specific laboratory needs, a letter should accompany the application from the specific institution willing to provide the resources.

• Host(s) Curriculum Vitae/Resume

• Host(s) proposed Mentoring Plan

• Host(s) list of current and pending research support

NOTE: You can work with a host institution not listed on the UCAR Database of Hosts. Please see How Hosting Institutions Apply for more information.

5. Letters of Recommendation

You will be asked in the Workday application to provide the names and contact information of TWO individuals who could provide references on your behalf. Your PhD advisor does not have to provide a reference for you. If you would like your PhD Advisor to serve as a reference, you need to provide their name in both the Advisor and Reference boxes. No letters of recommendation are required at the time of application.

NOTE: Ensure that you inform your TWO references that they can expect a request from CPAESS|UCAR in the second half of October 2026 to complete a questionnaire that will serve as a Recommendation; these will be due by the end of October 2026.

For additional information, please visit the Climate & Global Change How to Apply website.

APPLICATION SUBMISSION STEPS

STEP 1. To begin the application process, select the "Apply" button. When prompted, create a new account. If you have applied to a different position within UCAR, please sign in to your existing account.

STEP 2. You will then be prompted to submit your current resume. At this point, you will upload your complete application document (i.e., all your application materials as outlined above, including your resume) as a single PDF document. Click "Select File" to find your file on your computer, and then select "Next".

STEP 3. Add any missing information and/or edit and verify any pre-populated information on the "My Information" and "My Experience" pages. Continue the application process as prompted.

QUESTIONS?

• Questions on the Workday application process may be addressed to HR Hiring at hiring@ucar.edu.

• General questions regarding this Fellowship program may be addressed to Cindy Bruyere at bruyerec@ucar.edu.

Benefits Overview

UCAR affirms its commitment to employees through competitive benefits. In addition to medical, dental, vision, retirement, and life insurance, UCAR offers a variety of programs focused on work-life balance and professional, and personal development. These include:

• Tuition Assistance, time off allowance to attend classes, and other professional development opportunities.

• UCAR contributes 10% of your eligible pay into your retirement account; 100% fully vested on day one.

• Starting minimum accrual of 20 days of personal time off each year (prorated for less than full-time positions).

• 10 paid holidays.

• 12 weeks of paid parental leave.

• Short-term medical leave paid at 100% of your regular salary.

• EcoPass for local Colorado residents to use the Denver and Boulder-area transit system at no cost.

Commitment to Job Application Fairness

Applicants are not required to provide age or age-related information and may redact information related to age, date of birth, or dates of attendance at or graduation from an educational institution from any submissions during the initial application process.

Some Final Considerations

At NSF NCAR| UCAR | UCP, you will work alongside a dedicated team of professionals conducting critical research and community outreach to solve complex Earth system science problems including climate change, air pollution, extreme weather, floods, drought, wildfires, and space weather, all with the goal of improving human life and reducing economic loss. Each of us, from scientists to the professionals who support their work, serves the public and a collaborative community of scientists in our mission to understand the complex processes that make up the Earth system, from the ocean floor to the Sun's core.

Flexible Work

At UCAR, we are committed to supporting our mission by giving staff the flexibility to find the schedule and location that works best to maintain their own work-life circumstances and reach their full potential as professionals. Many positions within our organization are eligible for fully on-site, hybrid (three days per week) and/or flexible work hours.

Equal Opportunity Employer

UCAR is committed to providing equal opportunity for all employees and applicants for employment and does not discriminate on the basis of race, age, creed, color, religion, national origin or ancestry, sex, gender, disability, veteran status, genetic information, sexual orientatio