Open Positions

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General Information

  • After looking over those materials, please write to Jose if interested.

Open Positions

Postdoctoral Researcher for WINTER aircraft field project, posted April 2014

A postdoctoral position is available in the Jimenez Research Group in CIRES and the Dept. of Chemistry and Biochemistry at the University of Colorado-Boulder. The successful candidate will be responsible for the deployment of a highly customized Aerodyne HR-ToF-AMS aboard the NCAR C-130 Aircraft [1] for the WINTER [2] project (January/February 2015). WINTER is a unique opportunity to study oxidative and multiphase chemistry of gases and aerosols during the wintertime and its impact on the winter haze over the Eastern US Seaboard. The successful candidate will lead the scientific analysis of this unique AMS dataset post-campaign. He/she would also have the opportunity to be involved in several future aircraft projects later on (GAMBAI, AToM), pending funding. The position will require a minimum of 6 weeks in the field during Jan/Feb. 2015.

A Ph.D. in chemistry, atmospheric sciences, environmental engineering, or a related discipline is required. Excellent skills in the operation and maintenance of advanced instrumentation, ideally acquired by involvement in instrument design and construction are essential. Experience with mass spectrometry, vacuum technology, aerosol instrumentation, as well as computer programming and/or complex data analysis (especially Igor Pro) are highly desirable. Experience with laboratory or field studies of atmospheric chemistry is also desirable. Background information about the research group, techniques, and previous publications and projects is available at the Jimenez Group Web Page (http://cires.colorado.edu/jimenez).

To apply, please submit an application via the Jobs @ CU system at this link with a cover letter describing your research interests, a CV, date of availability, 2-3 first-author journal paper reprints in PDF, and a list of 4 references. The initial appointment will be for one year starting no later than October 2014, with the expectation of annual renewal for two additional years upon satisfactory performance. The University of Colorado is an equal opportunity employer.

[1] https://www.eol.ucar.edu/node/139

[2] http://www.atmos.washington.edu/~thornton/field-campaigns/wintertime-investigation-transport-emissions-and-reactivity

Archive of Past Positions

This archive is kept here for future reference as we are very likely to search for people with similar profiles in the future.

Junior Faculty Position in Atmospheric Chemistry, posted Sept. 2013

  • This position is not in the Jimenez Group, but rather for someone who wants to establish an independent research group at CU
  • The ad for the position is here

Shared Lab Assistant, posted Feb. 2014

Posting Title: Lab / Logistics Assistant (Professional Research Assistant)

Job Summary: The Volkamer, Ziemann, and Jimenez research groups at the Cooperative Institute for Research in Environmental Sciences (CIRES) and the Dept. of Chemistry & Biochemistry at the University of Colorado-Boulder seek a full-time Professional Research Assistant to work as shared Lab/Logistics Assistant.

These research groups perform world-leading laboratory, field, and computational research in the fields of air pollution, atmospheric chemistry, and instrumentation development. Each group is composed of 7-15 students, postdocs, and faculty. Further information on these groups can be found at:

Job Description

The Lab/Logistics Assistant will perform the following tasks for all or some of the 3 research groups. Training will be provided as required.

  • Perform general lab administration, such as working with new and departing group members, managing group property and supplies, general shipping, coordinating equipment and building maintenance issues, moving equipment and shipping boxes to / from storage locations, coordinating visitor logistics & schedules, and similar tasks.
  • Organize, maintain, and repair (or co-ordinate repair) of laboratory, field, and instrument computers, as well as data servers, CPU clusters, and their connections. Training will be provided to the level of Dell Field Technician.
  • Maintain and expand web & wiki pages for the groups, including simple web-based databases.
  • Perform basic monitoring, maintenance, and calibration of research-grade instruments.
  • Coordinate and co-organize field campaign logistics, shipping, setup, operation, repairs, and teardown.
  • Perform logistical planning including organization of meetings (including web-enabled meetings) and organizing group travel to conferences and field studies.
  • Serve as purchaser for lab and field supplies, and reallocating those purchases to the appropriate grants in the CU accounting software system.
  • Serve as proctor for environmental health and safety, including ordering chemicals, maintaining the chemical database for each lab, supervising the correct storage of chemicals in the labs, coordinating with CU for disposal of chemical waste, and acting as lab eco-leader.
  • Serve as proctor for radiation safety, including monitoring low-level radioactive sources used in research, coordinating permits and administration with CU, as well as the transport of sources between labs at CU and the shipment of sources to / from field studies.
  • Keep track of hours spent working for each group and tasks pending using shared computer software.
  • Other tasks that may develop within the research and education missions of the groups.

Salary and Benefits:

  • Salary will be commensurate with skills and experience, in the range $29k-$39k.
  • The University of Colorado offers a full benefits package, including health insurance, a retirement plan, and 22 days of vacation per year. Information on University benefits programs is located at http://www.cu.edu/pbs/.

Minimum Qualifications:

  • A Bachelor Degree
  • Organizational and time-management skills, flexibility and ability to multi-task
  • Excellent interpersonal, written, and verbal communication skills
  • Self-motivated, detail-oriented, a fast learner, be able to work independently with minimal supervision
  • Ability to work with people of different backgrounds, nationalities, and personalities
  • Professional demeanor
  • Familiarity with Windows computers, basic office software (word processing, spreadsheets, presentations) and web software (e.g. plain HTML, Wiki editing, Google Site editing)

Desired Qualifications:

  • Prior experience in positions with similar requirements
  • Some college-level coursework in science, engineering, mathematics, and/or computer use
  • Ability to travel to field sites in the US and abroad for 1-2 weeks at a time, to assist in site and instrument setup, up to 4 weeks per year.
  • Ability to plot and archive data using computer software
  • Ability to perform basic electrical and mechanical instrument repairs
  • Experience in basic computer programming (e.g. C, Fortran, Igor)

Special Instructions to Applicants:

  • Review of applications will continue until the position is filled.

The following documents are required:

1) A Cover Letter which specifically addresses the job minimum requirements and desired qualifications of the position, as well as any special skills or limitations related to the job description.
2) A CV
3) Four (4) professional references; include addresses, daytime telephone numbers and e-mail addresses. If the references are not incorporated in the Resume, attach under "List of References.”
4) Proof of highest degree earned, including unofficial transcripts.

Please do NOT submit any of your application material via email to the job posting contact.

Other Info:

  • The University of Colorado is an Equal Opportunity Employer committed to building a diverse workforce. We encourage applications from women, racial and ethnic minorities, and individuals with disabilities.
  • The University does check references as part of the employment process, and selection committee members may choose to contact work references during the search process other than those listed in your application.
  • The University of Colorado is dedicated to ensuring a safe and secure environment for our faculty, staff, students and visitors. To assist in achieving that goal, we conduct background investigations for all prospective employees prior to their employment.
  • The Immigration Reform and Control Act require that verification of employment eligibility be documented for all new employees by the end of the third day of work.

Joint Postdoctoral Position in Indoor Air Chemistry, posted Sept. 2013

A postdoctoral position is available for a joint project in the Ziemann and Jimenez Research Groups in CIRES and the Dept. of Chemistry and Biochemistry at the University of Colorado-Boulder. The position will involve laboratory and field studies of indoor air chemistry, with a primary focus on the composition of organic gases, aerosols, and surface films in authentic and simulated indoor environments and the molecular-level details of the physical-chemical processes that determine the composition. Experimental equipment will include a new Aerodyne Time-of-Flight Chemical Ionization Mass Spectrometer (ToF-CIMS) configured with several ion sources and aerosol/gas sampling interfaces.

A Ph.D. in chemistry, atmospheric sciences, environmental engineering, or a related discipline is required. Experience with use of advanced instrumentation and methods for online and offline analysis of organic gas, aerosol, and bulk samples, such as mass spectrometry, gas and liquid chromatography, and spectrophotometry, as well as computer programming and/or complex data analysis using Igor Pro or another data analysis package is highly desirable. Experience with laboratory or field studies of atmospheric organic chemistry is also desirable. Background information about the research groups, techniques, and previous publications and projects is available at the Ziemann Group Web Page and the Jimenez Group Web Page.

To apply, please send an email describing your research interests, a CV, date of availability, 2-3 first-author journal paper reprints in PDF, and a list of 4 references to Prof. Paul J. Ziemann (paul.ziemann@colorado.edu) and Jose L. Jimenez (jose.jimenez@colorado.edu). The initial appointment will be for one year starting in the fall of 2013, with the expectation of renewal for at least one additional year upon satisfactory performance. Later start dates are also possible. The University of Colorado is an equal opportunity employer.

This ad was posted on 2 Sept. 2013.

Postdoctoral Position in Secondary Organic Aerosol Modeling, posted Sept. 2013

A postdoctoral position is available in the Jimenez Research Group in CIRES and the Dept. of Chemistry and Biochemistry at the University of Colorado-Boulder, in collaboration with the Hodzic/Madronich groups at NCAR. The position will involve modeling of Secondary Organic Aerosol (SOA) formation in field studies and comparison to highly detailed ambient data. Modeling will use a range of approaches from parameterized models to the GECKO-A fully explicit model. Application will focus the on both ambient & Potential Aerosol Mass (PAM) flow reactor data from the CalNex field study, but also potentially including the BEACHON-RoMBAS and SOAS field studies, as well as laboratory studies. Example of prior publications include Dzepina et al. 2009, Dzepina et al. 2011; Lee-Taylor et al., 2011 and Waxman et al. 2013.

A Ph.D. in chemistry, atmospheric sciences, environmental engineering, or a related discipline is required. Experience with computer programming and/or complex data analysis using Igor Pro or similar data analysis software is required. Experience with field or laboratory studies of atmospheric organic chemistry is also desirable. Background information and previous publications from the Jimenez group is at our Jimenez Group Web Page, while information on our collaborators is on the Hodzic and Madronich pages at NCAR.

To apply, please send an email describing your research interests, a CV, date of availability, 2-3 first-author journal paper reprints in PDF, and a list of 4 references to Prof. Jose L. Jimenez (jose.jimenez@colorado.edu). The initial appointment will be for one year starting in the fall of 2013, with the expectation of renewal for at least one additional year upon satisfactory performance. Later start dates are also possible. The University of Colorado is an equal opportunity employer.

This ad was posted on 2 Sept. 2013.

Postdoc Position in OA Regional Modeling, advertised in Fall of 2011

A position in regional modeling of organic aerosols (OA) with a focus on the WRF/Chem model, will become available at NCAR in Fall 2011, for a collaborative project with the University of Colorado. The successful candidate will adapt and implement new mechanisms and parameterizations of OA and SOA formation, evolution, and loss into WRF/Chem, and evaluate the results using observations from recent large field campaigns (e.g. MILAGRO, BEACHON, GVAX etc.).

The ideal candidate will have:

  • A Ph.D. in Chemistry, Atmospheric Sciences, or a related discipline.
  • Experience with atmospheric chemistry & transport modeling (e.g. regional or global models).

Other modeling experience such as LES, master mechanism, box etc. is also beneficial.

The initial appointment will be for 1 year but the expectation is of renewal for up to 2 more years upon satisfactory performance. The start date should be in Spring or Summer 2012. Applications will be reviewed starting in Oct. 2011, and until the position is filled.

If you are interested in the position, please email Alma Hodzic <alma@ucar.edu> and Jose-Luis Jimenez <jose.jimenez@colorado.edu>, attaching a cover letter indicating your date of availability, your CV, PDFs of 2-3 first author publications, and contact information for 4-5 references. NCAR is an Equal Opportunity Employer.

Some previous publications from our collaborative research include Hodzic et al. ACP 2009; Hodzic et al., ACP 2010a; Hodzic et al., ACP 2010b; Hodzic and Jimenez, GMD 2011.

Staff Scientist Position, posted Nov. 2009

A Staff Scientist position in experimental atmospheric chemistry is available starting in early 2010. This position will be 50% "hard" funding (provided by CIRES and not tied to grants) and 50% soft money (tied to grants of the groups below) for at least 3 years, with the intention of continuing indefinitely. It will be centered in the Jimenez group (>= 50% time) and will be shared with the Volkamer Group (up to 50% time), and possibly with other atmospheric chemistry groups within CIRES & Chemistry (Tolbert and Vaida groups). The Staff Scientist will help train and work with students and postdocs, and co-supervise laboratory and field experiments and data analysis and modeling studies on atmospheric chemistry. An ideal candidate would be someone who loves research but prefers working as part of a group rather than working on a faculty position. Background information about the research groups, techniques, and previous publications and projects of these groups is available at:

The ideal candidate will have:

  • A Ph.D. in Chemistry, Atmospheric Sciences, or a related discipline.
  • Postdoctoral experience
  • Ability to make a commitment of 3-5 years to this position
  • Experience with advanced instrumentation and data interpretation, such as mass spectrometry, optical spectroscopy, vacuum technology etc.
  • Interest in working with students and postdocs and helping train them on lab techniques, see e.g. this list of lab skills
  • Ability to travel to field studies to assist students & postdocs, especially during the setup phase and in case of problems (~4-8 weeks total travel time per year on average)
  • Willingness to participate on aircraft-based field studies
  • Desire and ability to communicate and work with multiple students and postdocs
  • Experience with computer programming and data analysis, especially Igor Pro, but otherwise Matlab, Fortran, IDL etc.
  • Experience with data acquisition programming with Labview (or similar software packages)
  • Interest on having his/her own research projects, presenting results at conferences, and publishing some first-author papers
  • Interest on participating on (and eventually potentially leading) proposal-writing

The initial appointment will be for 1 year but the expectation is of renewal for 3-5 years upon satisfactory performance. Please email jose.jimenez@colorado.edu if you are interested in this position, attaching a cover letter, your CV, 2-3 first author publications, and contact information for 4-5 references. The University of Colorado is an Equal Opportunity Employer.

This ad was posted on 14 Nov. 2009. This position was filled on 7-Feb-2010.


Postdoctoral Position in Aerosol Mass Spectrometry, posted Oct. 2009

A postdoctoral position is available in the Jimenez Research Group in CIRES and the Dept. of Chemistry and Biochemistry at the University of Colorado-Boulder. This position focuses on field studies of organic aerosol sources and processing using high-resolution aerosol mass spectrometry (HR-ToF-AMS) and thermal desorption aerosol GC-MS (TAG) as part of the CalNex-LA-2010 and BEACHON-SRM-2011 field studies. Both field studies will provide excellent research opportunities and complementary data from many advanced instruments. Information on these studies can be found at:

A Ph.D. in chemistry, atmospheric sciences, environmental engineering, or a related discipline is required. Experience in experimental research is needed. Experience with instrument design and construction, advanced instrumentation use, computer programming, and/or complex data analysis is highly desirable. Experience with mass spectrometry, vacuum technology, aerosol instrumentation, Igor Pro or another data analysis package, Labview, or field studies are also desirable. Ability to travel to field studies, to work in a team with members of our group and multiple collaborators, and to lead the writing of papers for peer-reviewed journals is essential. Background information about the research group, techniques, and previous publications and projects is available at:

Four papers that describe the techniques and scientific problems that our group focuses on can be downloaded from:

and many additional publications can be downloaded from our group publications page:

To apply, please send an email describing your research interests, a CV, date of availability, 2-3 first-author journal paper reprints in PDF, and a list of 4 references to Prof. Jose L. Jimenez (jose.jimenez@colorado.edu). The initial appointment will be for one year starting around Jan. 2010, with the expectation of annual renewal for two additional years upon satisfactory performance. Later start dates are also possible. The University of Colorado is an equal opportunity employer.

This ad was posted on 4 Oct. 2009. This position was filled on 23 Nov. 2009.

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