Senior Chemical/Environmental Engineer or Environmental Scientist 2

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

Find your path and enjoy the journey at Haley & Aldrich. With us, you'll tackle clients' most meaningful challenges in the built and natural environments - and, in turn, build stronger communities. You'll work with teams of passionate colleagues, driven by a commitment to technical excellence and continuous learning.

As a company, we aim to build a world where communities go beyond resilience, embracing change as an opportunity to enhance safety, well-being, and quality of life. Join us to accelerate this vision and your professional development. We are looking to add new talent to our growing team! We are currently seeking a Senior Chemical/Environmental Engineer or Environmental Scientist to work in a technical role with highly skilled professionals on diverse project teams in a dynamic environment. This is an excellent opportunity to join a growing group and company and get involved in a variety of projects for a diverse range of clients. This is a full-time position located in our Costa Mesa, CA office.

In this role, you will help increase our technical bench strength in California and across the Western Region. You will apply extensive knowledge of federal and state environmental regulations to lead environmental compliance assignments, with particular emphasis on air compliance, air permitting, air dispersion modeling, and multimedia environmental compliance auditing.

DUTIES/RESPONSIBILITIES

In this position, you will:

• Support current EHS practitioners and contribute to the continued growth of our EHS practice.
• Work with energy, industrial, and other clients across the nation, providing technical leadership, coordinating with clients and regulators, managing project work, and mentoring staff.
• Coach, mentor, and support staff to facilitate knowledge transfer and ensure high-quality execution of project tasks, technical reports, and deliverables.
• Understand client needs and execute projects to achieve client goals.
• Understand Federal and state environmental regulations and to evaluate and interpret requirements as they apply to our clients.
• Lead environmental compliance projects, with special emphasis on air dispersion modeling, permitting, and compliance.
• Coordinate with clients and regulators to support projects throughout the U.S.
• Be capable of managing financial and technical aspects of projects.
• Be effective in assigning and managing work.
• Execute projects to meet technical, quality, budgetary and scheduling requirements.
• Prepare project deliverables including reports, plans, and specifications.
• Demonstrate very strong verbal communications and written skills including client deliverables and regulatory submittals.
• Demonstrate strong coaching and mentoring skills.
• Perform all work in accordance with company and client Health & Safety protocols.
• Comply with Guiding Principles and Code of Behavior articulated in our Company Charter
• Some travel may be required.

SKLLS/EXPERIENCE

Minimum Skills and Requirements:

• Minimum B.S./B.A. degree in Environmental Engineering, Environmental Science, or related discipline. Master's degree preferred.
• 15+ years of related work experience.
• Experience in performing air quality modeling using standard air quality models (e.g., AERMOD, AERSCREEN) is desirable.
• Experience preparing permit applications and air emission calculations.
• Technical report writing skills.
• Communication skills and ability to collaborate with others in a consulting environment.
• Strong attention to detail with excellent analytical, judgment, and problem-solving capabilities.
• Understanding of common industrial activities and the relationship with various environmental media/regulations (e.g., air, wastewater, regulated waste, EPCRA, tanks).
• Working knowledge of MS Office including Word, Excel, and other standard software. GIS or CAD experience a plus.

The salary range for this position in Costa Mesa, CA is $105,000-$140,000 annually. Actual compensation will be based upon a variety of factors such as education, related work experience, certificates, skills, and current market conditions. Haley & Aldrich reviews salary ranges each quarter to assess competitiveness with the market.

About Haley & Aldrich

Haley & Aldrich is committed to delivering the value our clients need from their capital, operations, and environmental projects. Our team of 1,000+ engineers and scientists across the United States draw inspiration from one mission: to work closely with clients as they navigate change to create safer, more robust places to live and work. Since our founding in 1957, organizations across the public and private sectors have relied on us for technical excellence and empathetic leadership that achieve results and secure a thriving tomorrow. Learn more at haleyaldrich.com. Haley & Aldrich is an equal opportunity employer. All qualified applications will receive consideration for employment without regard to gender, race, age, disability, veteran, or any other legally protected status. We offer excellent career growth, a highly competitive total compensation plan, and a solid benefits package.