CIRES/Jimenez Research Group Post-Doctoral Researcher in Aerosol Mass Spectrometry Halogen Data Analysis
Requisition Number: 71317
Location: Boulder Colorado
Employment Type: Research Faculty
Schedule: Full Time
Posting Close Date: 24-Apr-2026
Date Posted:
Job Summary
The Cooperative Institute for Research in Environmental Sciences (CIRES) at the University of Colorado at Boulder (CU Boulder) announces a position for a Post-Doctoral Associate in the Jimenez Research Group. This postdoctoral researcher will be responsible for conducting data analysis of previously acquired data using an aerosol mass spectrometer (AMS) from multiple field campaigns to quantify halogen (I, Br, Cl) species in the particle phase.
CU is an Equal Opportunity Employer and complies with all applicable federal, state, and local laws governing nondiscrimination in employment. We are committed to creating a workplace where all individuals are treated with respect and dignity, and we encourage individuals from all backgrounds to apply, including protected veterans and individuals with disabilities.
Who We Are
CIRES (https://cires.colorado.edu/) is an internationally recognized leader in innovative environmental science and research and is located at the University of Colorado Boulder. At CIRES, more than 900 environmental science professionals work to understand the dynamic Earth system, including people's relationship with the planet. CIRES has partnered with NOAA since 1967, and our areas of expertise include weather and climate, changes at Earth's poles, air quality and atmospheric chemistry, water resources, solid Earth sciences, and more. Our vision is to be instrumental in ensuring a sustainable future environment by advancing scientific and societal understanding of the Earth system.
The Jimenez Research group conducts laboratory and field studies of sources and chemistry of aerosols in the atmosphere. Gas- and particle-phase chemical species are measured with chemical ionization mass spectrometer (CIMS) and AMS on the ground and airborne platforms, as well as within environmental chambers. These observations are used to identify the chemistry involving organics, nitrogen, sulfur, and halogens over various environments (e.g., urban, marine, biomass burning, and the stratosphere). The Jimenez Group is highly collaborative both internally and externally.
What Your Key Responsibilities Will Be
Conduct data analysis to quantify atmospheric particulate halogens from AMS data acquired from previous field measurements (30%).
Perform laboratory calibrations as needed to interpret the field observations (20%).
Perform box modeling using airborne in-situ observations (10%).
Finalize existing drafts of journal papers for submission to scientific journal peer-review (40%).
What You Should Know
This is a 4-month in-person appointment at the University of Colorado Boulder campus.
Given project deliverables, candidates must be able to start work by May 4, 2026.
This position does not offer visa sponsorship. Candidates must be able to work full time in the U.S by the start date.
This position is in-person at the University of Colorado Boulder. Remote work will not be allowed.
What We Can Offer
CIRES can offer a generous compensation package.
The annual hiring salary range for this position is $55,000. Salary is commensurate with education and experience and determined based on our CIRES internal career track classification.
The University of Colorado Boulder offers a robust training curriculum, opportunities for professional development and a Mentorship Program.
Boulder (https://bouldercolorado.gov/) is a vibrant community with access to mountain parks, dog parks, miles of trails, rivers, lakes, cafes, restaurants, boutiques, theaters, museums, and sports venues.
As an employee at CU Boulder, you will have free access to the regional public transit system, (https://www.rtd-denver.com/) an outstanding network of buses and light rail systems that service Boulder and connect to Denver, the Denver airport, and surrounding communities.
Benefits
At the University of Colorado Boulder (https://www.colorado.edu/) , we are committed to supporting the holistic health and well-being of our employees. Our comprehensive benefits package (https://www.colorado.edu/jobs/benefits) includes medical, dental, and retirement plans; generous paid time off; tuition assistance for you and your dependents; and an ECO Pass for local transit. As one of Boulder County's largest employers, CU Boulder offers an inspiring academic community and access to world-class outdoor recreation. Explore additional perks and programs through the CU Advantage (https://advantage.cu.edu/campus/cu-boulder) program.
Be Statements
Be effective. Be willing. Be Boulder.
What We Require
A PhD degree in chemistry.
At least 5 years of experience in the measurements of halogen species with aerosol mass spectrometry.
What You Will Need
Knowledge of atmospheric chemistry.
Ability to conduct calibration for Aerodyne aerosol mass spectrometer (AMS) with various types of aerosol calibrant in the laboratory.
Advanced knowledge of the Igor Pro software, including programming.
Ability to conduct high-resolution AMS data analysis using AMS software (i.e., Squirrel and Pika).
Ability to run a kinetic box model in the F0AM software constrained by field in-situ observations.
Strong writing skills and data analysis skills of large data sets.
Strong work ethic and interest in conducting challenging research on halogen chemistry with complex multiple airborne data sets.
Special Instructions
To apply please submit the following materials with your application:
Resume or CV;
Cover letter addressed to the Search Committee briefly describing your qualifications, professional goals, and specific interest in this position.
If you are identified as a finalist, the search committee will request a letter of recommendation at a later time.
This position will close April 24, 2026.
Note: Application materials will not be accepted via email. For consideration, applications must be submitted through CU Boulder Jobs (https://jobs.colorado.edu/) .
In compliance with the Colorado Job Application Fairness Act, in any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.
To apply, visit https://jobs.colorado.edu/jobs/JobDetail/CIRES-Jimenez-Research-Group-Post-Doctoral-Researcher-in-Aerosol-Mass-Spectrometry-Halogen-Data-Analysis/71317 (https://apptrkr.com/7101772)
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The University of Colorado does not discriminate on the basis of race, color, national origin, sex, age, pregnancy, disability, creed, religion, sexual orientation, gender identity, gender expression, veteran status, political affiliation, or political philosophy. All qualified individuals are encouraged to apply.
