Air Quality and GHG Emissions Specialist

Psomas is seeking an Air Quality and GHG Emissions Specialist in Pasadena, CA. The role involves preparing air quality and GHG analyses, performing emissions modeling, and collaborating on environmental projects. Candidates should have a relevant degree and 4-5 years of experience with CEQA and NEPA compliance. The position offers a hybrid work schedule, competitive salary, benefits, and opportunities for career growth.
About the position

We're seeking an experienced Air Quality & Greenhouse Gas (GHG) Emissions Specialist to support a diverse portfolio of public and private sector projects. In this role, you'll prepare air quality and GHG analyses for CEQA and NEPA documentation, perform emissions modeling, and collaborate with multidisciplinary teams to deliver high-quality environmental solutions.

Responsibilities

Conduct emissions modeling and Health Risk Assessments utilizing CalEEMod, Excel, AERMOD, EMFAC, HARP, and OFFROAD.Review emissions modeling analyses and provide QA/QC feedback for models developed in Excel, AERMOD, EMFAC, HARP, and OFFROAD.Requirements

Bachelor's degree in Civil or Environmental Engineering, Environmental Science, Atmospheric Science, Meteorology, Planning, or a related field.4–5 years of direct professional experience conducting air quality and greenhouse gas (GHG) analyses and assessments in compliance with CEQA and NEPA.Strong analytical, computer, spreadsheet, and technical writing skills, with demonstrated proficiency in emissions modeling software for California development projects. Knowledge of state and federal air quality and climate change regulations and policies, including CEQA, NEPA, and the Clean Air Act.Strong technical writing and analytical skillsBenefits

Employee Ownership: 100% company-paid ESOP plus a 401(k) with immediate company match.People First Culture: We value diverse perspectives, collaborative leadership, and a shared commitment to technical excellence and people development.Hybrid Flexibility: A consistent 3/2 hybrid schedule that supports both collaboration and focused work.Career Growth: Structured career pathing, leadership development, and internal coaching designed to support long-term growth into senior leadership.Salary: $70,000/yr – $110,000/yr (commensurate with experience)Incentives: Discretionary bonus and recognition programsTime Off: 3–4 weeks PTO plus 8 paid holidays (depending on experience)Total Rewards: Comprehensive medical, dental, and vision coverage for you and your family, along with employee ownership and retirement benefits.