Are you a visionary scientist or engineer with a knack for bridging technical expertise with business strategy? This role invites you to wear multiple hats as a technical leader, business developer, and entrepreneurial thinker. You'll lead cutting-edge air quality and emissions projects while cultivating industry partnerships, exploring market opportunities, and driving sustainable business growth. Ready to Innovate & Inspire? If you're ready to combine your technical expertise, industrial savvy, and entrepreneurial spirit, apply now! Take the lead in transforming challenges into opportunities and drive sustainable progress in air quality. We are SLR Consulting (US), a 500+ coast-to-coast team of advisory, environmental/engineering, and regulatory professionals. We deliver environmental and sustainability services to our clients through the integration of over 30 advisory, technical environmental, and engineering disciplines to help clients address some of their most complex challenges around sustainability. We are Making Sustainability Happen. As our new Principal Air Quality Engineer, you will play a key role on our air quality team. We are a trailblazer in air quality and emissions management, driving transformative changes at the nexus of science, industry, and sustainability. Our mission? Empowering clients to advance their projects effectively using our collective expertise. Qualifications: A seasoned scientist or engineer with 15+ years of experience in air quality monitoring, emissions testing, or a related field. Bachelor of Science degree in Meteorology, Atmospheric Sciences, or closely related scientific or engineering field. Proven experience in industrial environments, with an understanding of operational challenges and solutions. A track record of success in business development, client relations, and project leadership. Strong entrepreneurial identity with the ability to think creatively and seize opportunities in a competitive market. Expertise in analytical technologies (ambient air, fenceline, trace level, emissions) and data analysis tools. Exceptional communication and presentation skills, tailored to diverse technical and non-technical audiences. Passion for innovation, sustainability, and driving impact. Successful individuals will connect ideas, work across disciplines, and handle dynamic priorities.