Experienced  Innovative  ReliableProviding  environmental  compliance solutions  for  over  30  years

Sierra Research was founded in 1981 and is a leading consulting firm in the field of air quality and air pollution control.  Sierra provides a broad range of environmental consulting, engineering, and technical services, assisting government- and private-sector clients with a wide variety of engineering, testing, modeling, analytical, and regulatory compliance tasks related to air quality and air pollution control.  Our experience ranges from assisting businesses with air quality permits, to designing vehicle emissions inspection programs to providing research and analysis related to air quality planning and emission control measure development for government agencies.

Our headquarters are located in Sacramento, California, with an additional office in Ann Arbor, Michigan.  Our staff of professionals includes individuals trained and experienced in the fields of automotive engineering, mechanical engineering, chemical engineering, environmental engineering, civil engineering, atmospheric science, meteorology, chemistry, biology, and law.