Principal Air Quality Engineer​/Scientist

Principal Air Quality Engineer/Scientist

Join SLR Consulting as a Principal Air Quality Engineer/Scientist in Irvine, California.

We are a 500+ member team delivering environmental and sustainability services. We are looking for an experienced professional to support air quality regulation compliance and customer engagement.

• Competitive total compensation package: medical, dental, orthodontia, vision, FSA/HSA, generous PTO, 10 paid holidays, 401(k) with match, life insurance, disability insurance, employee assistance program.
• Salary range: $140,000 - $160,000, with final compensation based on education, designation, experience, internal parity, and location.
• Full‑time, permanent role with opportunities for professional growth and advancement.

• Perform emissions estimate calculations for permitting, emissions inventories, and annual compliance reporting.
• Review state, federal, and local regulations for applicability determinations and compliance tasking.
• Provide compliance assistance for clients, including data management, document review, and development of compliance tools.
• Work with clients from a variety of industries in various geographic locations, including the United States and abroad.
• Travel to clients’ facilities for inspections and document review.
• Work within quality, budget, schedule expectations, and scope‑specific assignments.

• Bachelor of Science in Engineering, Environmental Science, Chemistry, or related field.
• 15+ years of related hands‑on experience.
• Knowledge of California and federal environmental regulations (Title V, PSD, GHG Reporting, NSPS, NESHAP, RMP).
• Experience with air compliance and permitting.
• Experience with reporting programs (air emissions inventory, greenhouse gases, annual/semi‑annual air permit reports, compliance certifications, monthly permits).
• Understanding of industrial operations and combustion equipment.
• Effective written and verbal communication, organization, and analytical skills.
• Proficiency with Microsoft Office suite.
• Valid driver’s license and ability to travel by airplane and car, including overnight travel.
• Preferred: air dispersion modeling (AERSCREEN, AERMOD), MOVES (or MOBILE), AutoCAD or GIS, oil and gas, power generation, mining, or ports, technical writing.

SLR is proud to be an Equal Employment Opportunity / Aff. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, gender, sexual orientation, civil union status, age, citizenship, marital status, disability, gender identity or expression, genetic information, or veteran status.

At SLR, we embrace diverse cultures, perspectives, skills, and experiences within and outside our organization. We respect and celebrate differences and want to ensure that we continuously strive to build a place where everyone feels included and is encouraged to be their authentic self.

We are committed to these values, and our SLR Culture & Diversity Team works to actively promote diversity, equity, and inclusion across our people and talent processes, operations, and client work around the world. If you have a disability and need reasonable accommodations at any point in the application or interview process, please contact us at