Seattle
Environmental consulting inSeattle
More than 30 years of environmental, health, safety, and sustainability expertise for employers across Washington and the Pacific Northwest.
Citadel EHS supports employers across Washington and the broader Pacific Northwest. We work with aerospace manufacturers and suppliers, technology and cloud computing companies, maritime and port operations, biotech and research institutions, and large healthcare systems.
We work with WA DOSH (L&I), the Washington Department of Ecology, and the Puget Sound Clean Air Agency on projects across the state. Our Seattle office, in Ballard, is the local point of contact.
On the ground
Our Seattle office
Our local office for projects anywhere in Washington and the Pacific Northwest.
See every Washington office on the Washington hub, or the full footprint on National Coverage.
Featured
Featured projects in the Seattle region
A selection of our work across the Puget Sound region.
Healthcare Realty Regulated Materials & Building Sciences Consulting
Citadel EHS has provided building sciences, industrial hygiene, environmental health, and regulated materials consulting services for Healthcare Realty properties and project sites since 2021, including a Limited Regulated Materials Survey in support of a tenant improvement remodel at a MultiCare Health System facility in Tacoma, Washington.
Healthcare Clinic Industrial Hygiene & Indoor Environmental Quality Consulting
Citadel EHS has provided industrial hygiene, indoor environmental quality, and facility-related environmental health consulting services for a healthcare sector client in Washington, including an indoor air quality assessment at an occupied healthcare clinic near Tacoma.
May 8, 2026
Growing our Pacific Northwest team
Citadel EHS added Brett Phillips, Principal Consultant in Industrial Hygiene & Safety, and Craig Peterson, Principal in Engineering & Environmental Sciences, to support continued growth in industrial hygiene, safety consulting, and environmental engineering services across the Pacific Northwest, including the greater Seattle region.
Read the announcement