Air Quality and GHG Emissions Specialist

Psomas is seeking an Air Quality and GHG Emissions Specialist in Santa Ana, CA. This role involves preparing technical analyses, supporting compliance with environmental regulations, and collaborating with multidisciplinary teams on various projects. Required qualifications include a relevant bachelor's degree and 4+ years of experience in air quality analyses. The position offers a hybrid work schedule, competitive salary, and benefits including retirement plans and PTO.
Air Quality and GHG Emissions Specialist | Environmental Services


Own Your Future at Psomas Join a 100% employee-owned firm built for long-term thinking, shared success, and meaningful impact. As our Air Quality & GHG Emissions Specialist for our Environmental Services team in Santa Ana, CA, you'll support a diverse portfolio of public and private sector projects. In this role, you'll contribute to meaningful environmental work by preparing technical analyses, supporting compliance efforts, and collaborating with multidisciplinary teams to deliver high-quality solutions.


Why Psomas



Shared Success: An ownership culture that rewards long-term thinking and doing what's right.
Retirement Benefits: Company-funded ESOP + 401(k) with immediate match.
Hybrid Flexibility: 3/2 hybrid schedule.
Career Growth: Clear pathways, coaching, and leadership development.
People-First Culture: Collaborative teams that invest in your development.
Meaningful Work: Community-impact projects plus ways to give back.

What You'll Do


As our Air Quality & GHG Emissions Specialist, you will support environmental analysis and documentation efforts, helping ensure projects meet regulatory requirements while delivering high-quality technical work.



Air Quality & GHG Analysis Prepare air quality and greenhouse gas analyses in support of CEQA and NEPA documentation for a variety of projects.
Emissions Modeling & Assessment Conduct emissions modeling and health risk assessments using tools such as CalEEMod, AERMOD, EMFAC, HARP, OFFROAD, and Excel.
Technical Review & Quality Assurance Review modeling outputs and analyses, providing QA/QC feedback to ensure accuracy, consistency, and compliance with regulatory standards.
Collaboration & Project Support Work closely with multidisciplinary teams to support project delivery and integrate environmental considerations into planning and design efforts.

Required Qualifications:



Bachelor's degree in Civil or Environmental Engineering, Environmental Science, Atmospheric Science, Meteorology, Planning, or a related field.
4+ years of direct professional experience conducting air quality and greenhouse gas (GHG) analyses and assessments in compliance with CEQA and NEPA.
Proficiency with emissions modeling tools such as CalEEMod, AERMOD, EMFAC, HARP, OFFROAD, and Excel
Strong understanding of state and federal air quality and climate regulations, including CEQA, NEPA, and the Clean Air Acy
Strong analytical, technical writing, and communication skills

Compensation & Benefits:



Salary: $70,000/yr – $110,000/yr (commensurate with experience)
Incentives: Discretionary bonus and recognition programs
Time Off: 3 weeks PTO plus 8 paid holidays
Total Rewards: Comprehensive medical, dental, and vision coverage for you and your family, along with employee ownership and retirement benefits.

Our Hiring Approach: Our recruiting team reviews every application personally and will keep you informed throughout the process. If your background aligns with what we need, we'll reach out to discuss next steps.


Equal Opportunity Employer: We are an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, national origin, disability status, protected veteran status, protected veteran status, sexual orientation, gender identity, or any other characteristic protected by law.