Senior Environmental Compliance & Air Modeling Engineer

Haley & Aldrich Inc.; Costa Mesa (CA); On-site; USD 105,000 - 140,000; Full time

Job summary

Haley & Aldrich is seeking a Senior Chemical/Environmental Engineer or Environmental Scientist to join our Costa Mesa, CA office. You will lead environmental compliance efforts with a focus on air permitting, dispersion modeling, and regulatory auditing, while mentoring a technical team.

The role requires strong technical report writing, client communication, and collaboration across projects. Extensive experience in environmental modeling and permit applications is essential for success.

Qualifications

• Minimum B.S./B.A. in Environmental Engineering, Environmental Science, or related discipline. Master's preferred.
• 15+ years of related work experience.
• Experience in air quality modeling using standard models (AERMOD/AERSCREEN) desirable.
• Experience preparing permit applications and air emission calculations.
• Technical report writing skills.
• Strong communication and collaboration in a consulting environment.
• Attention to detail with strong analytical and problem-solving abilities.
• Understanding of environmental media/regulations (air, wastewater, EPCRA, tanks).
• MS Office proficiency; GIS or CAD a plus.

Responsibilities

• Lead environmental compliance projects with emphasis on air dispersion modeling and permitting.
• Coordinate with clients and regulators, manage project work, and mentor staff.
• Prepare high-quality technical reports, plans, and specifications.
• Ensure client needs are understood and met; manage budgets and schedules.
• Deliver projects with rigorous quality, timeliness, and safety adherence.

Skills

Air quality modeling

Regulatory compliance

Technical report writing

Client communication

Team mentoring

MS Office

GIS/CAD

Education

B.S./B.A. in Environmental Engineering or Environmental Science

Master's degree preferred

Tools

AERMOD

AERSCREEN

GIS

CAD

Job description

Haley & Aldrich is seeking a Senior Chemical/Environmental Engineer or Environmental Scientist to join our Costa Mesa, CA office. You will lead environmental compliance efforts with a focus on air permitting, dispersion modeling, and regulatory auditing, while mentoring a technical team.

The role requires strong technical report writing, client communication, and collaboration across projects. Extensive experience in environmental modeling and permit applications is essential for success.