[ES_JOBS_NET] CIRES/Jimenez Research Group Post-Doctoral Researcher in Aerosol Mass Spectrometry Halogen Data Analysis

[Christine Wiedinmyer]

CIRES/Jimenez Research Group Post-Doctoral Researcher in Aerosol Mass
Spectrometry Halogen Data Analysis
https://jobs.colorado.edu/jobs/JobDetail/CIRES-Jimenez-Research-Group-Post-Doctoral-Researcher-in-Aerosol-Mass-Spectrometry-Halogen-Data-Analysis/71317



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
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
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
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
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
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 Statements
Be effective. Be willing. Be Boulder.
 What We Require
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
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.

 What We Would Like You to Have
What We Would Like You to Have

Please note that while the position details both required and preferred
skills and experience, we invite applicants to apply even if they do not
have the preferred skills and experience outlined in this section. If you
meet the requirements and have passion for the work, you are encouraged to
apply. We encourage on the job training for any additional skills or
knowledge that become relevant to the position.

   - Experience with Aerodyne aerosol mass spectrometer (AMS).
   - Experience with laboratory and field studies (especially on aircraft
   platforms).
   - Experience with data analysis methods for mass spectrometers.
   - Experience with box models and/or global chemical transport models.
   - Experience with the Igor Pro software and computer programming within
   it.
   - Knowledge of mechanisms of atmospheric halogen compounds.

 Special Instructions
Special Instructions

To apply please submit the following materials with your application:

   1. Resume or CV;
   2. Cover letter addressed to the Search Committee briefly describing
   your qualifications, professional goals, and specific interest in this
   position.
   3. 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.
Posting Contact Information

*Posting Contact Name:* Jose Jimenez

*Posting Contact Email:* jose.jimenez at colorado.edu
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