What are the responsibilities and job description for the Emissions Modeler position at California Air Resources Board?
Equal Opportunity Employer
The State of California is an equal opportunity employer to all, regardless of age, ancestry, color, disability (mental and physical), exercising the right to family care and medical leave, gender, gender expression, gender identity, genetic information, marital status, medical condition, military or veteran status, national origin, political affiliation, race, religious creed, sex (includes pregnancy, childbirth, breastfeeding and related medical conditions), and sexual orientation.
It is an objective of the State of California to achieve a drug-free work place. Any applicant for state employment will be expected to behave in accordance with this objective because the use of illegal drugs is inconsistent with the law of the State, the rules governing Civil Service, and the special trust placed in public servants.
Position Details
Job Code #:
JC-520347
Position #(s):
673-710-3735-031
Working Title:
Emissions Modeler
Classification:
AIR RESOURCES ENGINEER (MAND)
$6,488.00 - $7,735.00 A
$7,428.00 - $9,296.00 B
$9,158.00 - $11,455.00 C
$9,712.00 - $12,152.00 D
New to State candidates will be hired into the minimum salary of the classification or minimum of alternate range when applicable.
# of Positions:
Multiple
Work Location:
United States
Telework:
Hybrid
Job Type:
Permanent, Full Time
Department Information
This employer participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.; for more information about E-Verify, please go to www.dhs.gov/e-verify
CARB values diversity at all levels of the organization and is committed to fostering an environment where employees from various backgrounds, cultures, and personal experiences are welcomed and can thrive. CARB believes the diversity of our employees collectively makes up one of the world’s most respected environmental organizations. CARB offers various modern interview options, including remote phone and video interviews. Join CARB and help us improve the lives of all Californians.
Department Website: http://www.arb.ca.gov
Job Description And Duties
This position can be located in Sacramento or Riverside County.
The On-Road Model Development Section (ORMDS) is recruiting for an Air Resources Engineer in the Mobile Source Analysis Branch (MSAB) of the Air Quality Planning and Science Division (AQPSD). This section is responsible for the development and refinement of the EMFAC on-road emissions inventory model. The EMFAC model supports air quality planning, transportation planning, photochemical modeling, and project level assessment. This section also plays a key role in development of on-road heavy-duty mobile source regulations by providing technical support to regulatory divisions within CARB.
Under the direction of the Section Manager, the incumbent will develop and utilize techniques to process, synthesize, and make sense of the increasing amounts of highly detailed data (e.g., portable emissions measurement system or PEMS, telematics) on mobile source emissions and activity. The incumbent will implement updates to input data, model formulations, and techniques into the EMFAC code using Python and MySQL. Through participation in various workgroups and potential team leadership opportunities, the incumbent will stay abreast of the state-of-the science in existing, new, or evolving data collection and data integration techniques related to on-road emission models and emissions modeling techniques (e.g. U.S. EPA’s MOVES model). They will also provide review of technical reports, memoranda, and other documents intended for management or outside stakeholders.
In addition to technical data analysis and model development, staff are routinely asked to review the work of others, and to communicate with a wide variety of internal and external clients. We expect applicants to have an ability to communicate effectively on a technical and policy level, both verbally and in writing, with a wide variety of stakeholders including other CARB divisions, government agencies, policymakers, industry, environmental organizations, and the public.
CARB offers various modern interview options including remote phone and video interviews.
You will find additional information about the job in the Duty Statement .
Special Requirements
Applicants must include a Supplemental Questionnaire (SQ) for this recruitment. Applications without an SQ or including an SQ that does not directly answer all the items below will not be considered. Cover letters and resumes do not take the place of the SQ.
Application Instructions
Completed applications and all required documents must be received or postmarked by the Final Filing Date in order to be considered. Dates printed on Mobile Bar Codes, such as the Quick Response (QR) Codes available at the USPS, are not considered Postmark dates for the purpose of determining timely filing of an application.
Final Filing Date: 6/24/2026
Who May Apply
Individuals who are currently in the classification, eligible for lateral transfer, eligible for reinstatement, have list or LEAP eligibility, are in the process of obtaining list eligibility, or have SROA and/or Surplus eligibility (please attach your letter, if available). SROA and Surplus candidates are given priority; therefore, individuals with other eligibility may be considered in the event no SROA or Surplus candidates apply.
Applications will be screened and only the most qualified applicants will be selected to move forward in the selection process. Applicants must meet the Minimum Qualifications stated in the Classification Specification(s).
How To Apply
Complete Application Packages (including your Examination/Employment Application (STD 678) and applicable or required documents) must be submitted to apply for this Job Posting. Application Packages may be submitted electronically through your CalCareer Account at www.CalCareers.ca.gov. When submitting your application in hard copy, a completed copy of the Application Package listing must be included. If you choose to not apply electronically, a hard copy application package may be submitted through an alternative method listed below:
Address for Mailing Application Packages
You may submit your application and any applicable or required documents to:
State Air Resources Board
Essam Gad
Attn: Classification and Certification Unit
1001 I Street, 5th Floor
Sacramento , CA 95814
Address for Drop-Off Application Packages
You may drop off your application and any applicable or required documents at:
State Air Resources Board
Essam Gad
Classification and Certification Unit
1001 I Street, 5th Floor
Sacramento , CA 95814
The drop-off location is non-operational on weekends and holidays.
08:00 AM - 05:00 PM
Required Application Package Documents
The following items are required to be submitted with your application. Applicants who do not submit the required items timely may not be considered for this job:
The State of California is an equal opportunity employer to all, regardless of age, ancestry, color, disability (mental and physical), exercising the right to family care and medical leave, gender, gender expression, gender identity, genetic information, marital status, medical condition, military or veteran status, national origin, political affiliation, race, religious creed, sex (includes pregnancy, childbirth, breastfeeding and related medical conditions), and sexual orientation.
It is an objective of the State of California to achieve a drug-free work place. Any applicant for state employment will be expected to behave in accordance with this objective because the use of illegal drugs is inconsistent with the law of the State, the rules governing Civil Service, and the special trust placed in public servants.
Position Details
Job Code #:
JC-520347
Position #(s):
673-710-3735-031
Working Title:
Emissions Modeler
Classification:
AIR RESOURCES ENGINEER (MAND)
$6,488.00 - $7,735.00 A
$7,428.00 - $9,296.00 B
$9,158.00 - $11,455.00 C
$9,712.00 - $12,152.00 D
New to State candidates will be hired into the minimum salary of the classification or minimum of alternate range when applicable.
# of Positions:
Multiple
Work Location:
United States
Telework:
Hybrid
Job Type:
Permanent, Full Time
Department Information
This employer participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.; for more information about E-Verify, please go to www.dhs.gov/e-verify
CARB values diversity at all levels of the organization and is committed to fostering an environment where employees from various backgrounds, cultures, and personal experiences are welcomed and can thrive. CARB believes the diversity of our employees collectively makes up one of the world’s most respected environmental organizations. CARB offers various modern interview options, including remote phone and video interviews. Join CARB and help us improve the lives of all Californians.
Department Website: http://www.arb.ca.gov
Job Description And Duties
This position can be located in Sacramento or Riverside County.
The On-Road Model Development Section (ORMDS) is recruiting for an Air Resources Engineer in the Mobile Source Analysis Branch (MSAB) of the Air Quality Planning and Science Division (AQPSD). This section is responsible for the development and refinement of the EMFAC on-road emissions inventory model. The EMFAC model supports air quality planning, transportation planning, photochemical modeling, and project level assessment. This section also plays a key role in development of on-road heavy-duty mobile source regulations by providing technical support to regulatory divisions within CARB.
Under the direction of the Section Manager, the incumbent will develop and utilize techniques to process, synthesize, and make sense of the increasing amounts of highly detailed data (e.g., portable emissions measurement system or PEMS, telematics) on mobile source emissions and activity. The incumbent will implement updates to input data, model formulations, and techniques into the EMFAC code using Python and MySQL. Through participation in various workgroups and potential team leadership opportunities, the incumbent will stay abreast of the state-of-the science in existing, new, or evolving data collection and data integration techniques related to on-road emission models and emissions modeling techniques (e.g. U.S. EPA’s MOVES model). They will also provide review of technical reports, memoranda, and other documents intended for management or outside stakeholders.
In addition to technical data analysis and model development, staff are routinely asked to review the work of others, and to communicate with a wide variety of internal and external clients. We expect applicants to have an ability to communicate effectively on a technical and policy level, both verbally and in writing, with a wide variety of stakeholders including other CARB divisions, government agencies, policymakers, industry, environmental organizations, and the public.
CARB offers various modern interview options including remote phone and video interviews.
You will find additional information about the job in the Duty Statement .
Special Requirements
Applicants must include a Supplemental Questionnaire (SQ) for this recruitment. Applications without an SQ or including an SQ that does not directly answer all the items below will not be considered. Cover letters and resumes do not take the place of the SQ.
- Require Name on SQ
- Require Job Control Number on SQ
- Maximum number of pages: 1 (Arial font, 12 point, single spaced, 1-inch margins)
Application Instructions
Completed applications and all required documents must be received or postmarked by the Final Filing Date in order to be considered. Dates printed on Mobile Bar Codes, such as the Quick Response (QR) Codes available at the USPS, are not considered Postmark dates for the purpose of determining timely filing of an application.
Final Filing Date: 6/24/2026
Who May Apply
Individuals who are currently in the classification, eligible for lateral transfer, eligible for reinstatement, have list or LEAP eligibility, are in the process of obtaining list eligibility, or have SROA and/or Surplus eligibility (please attach your letter, if available). SROA and Surplus candidates are given priority; therefore, individuals with other eligibility may be considered in the event no SROA or Surplus candidates apply.
Applications will be screened and only the most qualified applicants will be selected to move forward in the selection process. Applicants must meet the Minimum Qualifications stated in the Classification Specification(s).
How To Apply
Complete Application Packages (including your Examination/Employment Application (STD 678) and applicable or required documents) must be submitted to apply for this Job Posting. Application Packages may be submitted electronically through your CalCareer Account at www.CalCareers.ca.gov. When submitting your application in hard copy, a completed copy of the Application Package listing must be included. If you choose to not apply electronically, a hard copy application package may be submitted through an alternative method listed below:
Address for Mailing Application Packages
You may submit your application and any applicable or required documents to:
State Air Resources Board
Essam Gad
Attn: Classification and Certification Unit
1001 I Street, 5th Floor
Sacramento , CA 95814
Address for Drop-Off Application Packages
You may drop off your application and any applicable or required documents at:
State Air Resources Board
Essam Gad
Classification and Certification Unit
1001 I Street, 5th Floor
Sacramento , CA 95814
The drop-off location is non-operational on weekends and holidays.
08:00 AM - 05:00 PM
Required Application Package Documents
The following items are required to be submitted with your application. Applicants who do not submit the required items timely may not be considered for this job:
- Current version of the State Examination/Employment Application STD Form 678 (when not applying electronically), or the Electronic State Employment Application through your Applicant Account at www.CalCareers.ca.gov. All Experience and Education relating to the Minimum Qualifications listed on the Classification Specification should be included to demonstrate how you meet the Minimum Qualifications for the position.
- Resume is required and must be included.
- Degree and/or School Transcripts
- Supplemental Application - Please see the Special Requirements section of this job advertisement for detailed instructions for the SQ submission.
Salary : $6,488 - $12,152