Environmental Engineer, Air Quality

Sigma Earth; California, Northern (MO, KY); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Sigma Earth is seeking an experienced environmental engineer to support NSR/Title V permitting and regulatory compliance across multiple jurisdictions, including coordination with agencies.

Responsibilities include reviewing processes, facilities changes, emissions inventories, and agency communications while maintaining SOPs and supporting audits and inspections.

Qualifications

• Degree in Environmental or Chemical Engineering required.
• 5–7 years of NSR and Title V permitting experience across jurisdictions.
• Experience managing regulatory inspections and agency interactions.
• Strong knowledge of CAA, CEQA, NEPA, NESHAP, MACT, NSPS requirements.

Responsibilities

• Support air permitting by reviewing processes, emission sources, options, and agency communications.
• Assist with facility changes to ensure compliance with regulatory and company standards.
• Identify and manage environmental compliance risks and regulatory changes.
• Ensure compliance with federal, state, and local regulations including reporting and testing coordination.
• Support audits, inspections, and inquiries from regulatory agencies.
• Develop and maintain SOPs and work instructions.
• Conduct incident analysis to identify root causes and corrective actions.

Skills

Regulatory compliance

Air permitting

Project management

Technical writing

Education

Bachelor's in Environmental/Chemical Engineering

Job description

What You'll Do

• Support air permitting work by reviewing manufacturing processes, materials, emission sources, potential emissions, regulatory requirements, BACT analyses, permitting options, and agency communications.
• Assist with facility changes by reviewing new or modified equipment and programs to ensure compliance with regulatory and company standards.
• Identify and manage environmental compliance risks by tracking regulatory changes, emerging trends, and project updates through MOC and other tools.
• Help ensure compliance with federal, state, and local environmental regulations, including recordkeeping, routine evaluations, emissions reporting, compliance reporting, and source testing coordination.
• Support audits, inspections, and inquiries from federal, state, and local regulatory agencies.
• Develop, maintain, track, and report SOPs and work instructions.
• Conduct incident analysis to identify root causes and recommend appropriate corrective actions.

What You'll Bring

• Degree in Environmental Engineering, Chemical Engineering, or equivalent professional experience.
• 5-7 years of experience with NSR and Title V permitting and compliance across multiple jurisdictions, including Texas and California.
• Experience managing regulatory inspections and agency interactions.
• Strong understanding of air quality laws and standards, including CAA, CEQA, NEPA, NESHAP, MACT, and NSPS requirements.
• Experience with complex manufacturing or R&D facilities; chemical or semiconductor manufacturing/R&D experience is preferred.
• Ability to understand chemical and physical manufacturing processes and prepare accurate emission inventories for reports and permit applications.
• Strong ability to work efficiently, prioritize tasks, meet tight deadlines, and manage complex projects in a fast-paced environment.
• Excellent communication skills, with the ability to deliver clear and concise messages to leadership, production teams, engineers, legal counsel, and technical experts.
• Strong time management, analytical, problem-solving, and decision-making skills, with the ability to adapt to changing business needs.