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Senior Environmental Scientist
Senior Environmental Scientist-March 2024
Irvine
Mar 29, 2026
About Senior Environmental Scientist

  As our new Senior Environmental Scientist, Air Quality, you will:

  Work on air quality (AQ) and greenhouse gas (GHG) related project assignments.

  Conduct complex air quality (AQ) analysis.

  Develop criteria and toxic air pollutants and GHG emissions inventories for stationary and non-stationary sources using EPA and state emissions estimation tools including CalEEMod.

  Perform air quality impact modelling using EPA dispersion models such as AERMOD.

  Prepare health risk assessments using the Hot Spots Analysis and Reporting Program (HARP) model and state guidelines.

  Perform ambient air sampling using EPA test methods.

  Evaluate air pollutant and GHG reduction measures.

  Process and analyze customer data using Python and other advanced computing languages.

  Critically review local, state, and federal environmental regulations, draft regulatory applicability determinations and technical reports, and communicate findings to clients and regulatory agencies.

  For this role, we believe your starting point is:

  Bachelor’s degree in Environmental Science or any applicable field and 3 years of related experience, or alternatively a Master’s degree in same and 1 year of related experience.

  Experience must include working with CalEEMod emissions estimation tool, HARP health risk analysis tool, Python programming language, and state and federal regulations including the Clean Air Act, California Environmental Quality Act (CEQA), and the California Air Resources Board (CARB) Mandatory Reporting Requirement (MRR) and CARB Cap & Trade programs.

  Minimal travel to support client work

  Diversity, Equity & Inclusion

  At Actalent, diversity and inclusion are a bridge towards the equity and success of our people. DE&I are embedded into our culture through:

  Hiring diverse talent

  Maintaining an inclusive environment through persistent self-reflection

  Building a culture of care, engagement, and recognition with clear outcomes

  Ensuring growth opportunities for our people

  Actalent is an equal opportunity employer.

  About Actalent

  Actalent connects passion with purpose. We help visionary companies advance their engineering and science initiatives through access to specialized experts that drive scale, innovation, and speed to market. With a network of almost 30,000 engineering and sciences consultants and more than 4,500 clients across the U.S., Canada, Asia, and Europe, Actalent serves many of the Fortune 500. An operating company of Allegis Group, the global leader in talent solutions, Actalent launched as a new specialized engineering and sciences services and workforce solutions brand in 2021.

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