Pacific Northwest operations
Environmental Consulting Across the Pacific Northwest
Environmental, health, and safety consulting for employers across Washington and Oregon, with offices in Seattle and Portland serving the Puget Sound region and the wider Pacific Northwest.
Environmental consulting across Washington and Oregon
Citadel EHS provides environmental consulting, industrial hygiene, and EHS&S services for employers across Washington and Oregon. Our Seattle office, in Ballard, serves the Puget Sound region and statewide Washington clients; our Portland office serves Oregon and the wider Pacific Northwest. Together, the two offices work with WA DOSH (L&I), the Washington Department of Ecology, the Puget Sound Clean Air Agency, Oregon OSHA, and Oregon DEQ.
Our Pacific Northwest consultants support aerospace and maritime operators, technology and data center companies, life sciences and healthcare organizations, and food and beverage and industrial manufacturers. Services include building sciences and asbestos testing, moisture intrusion and mold inspection, air quality permitting, and safety consulting, available to clients throughout Washington and Oregon.
Where we work
Washington, Oregon, Seattle & Portland
Washington
Statewide environmental consulting, from Puget Sound to Eastern Washington.
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Oregon
Statewide environmental consulting, from the Silicon Forest to the Willamette Valley.
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Seattle
Our Seattle office in Ballard, serving the Puget Sound region.
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Portland
Our Portland office, serving Oregon and the wider Pacific Northwest.
Learn moreOn the ground
Offices in Washington and Oregon
Featured
Projects in Washington and Oregon
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.
Aerospace Manufacturing Facility Support
Citadel EHS provides ongoing environmental, industrial hygiene, and building sciences consulting for a major aerospace and defense manufacturer, supporting facility maintenance, infrastructure improvements, renovation, construction, and ongoing operations within active, highly controlled manufacturing environments.
Hyperscale Data Center Noise Assessment
Citadel EHS provides industrial hygiene and occupational noise consulting for hyperscale data center facilities operated by a global technology company. Citadel’s work includes assessments at data center facilities in Red Oak, Texas, and Bristow, Virginia, supporting the client’s efforts to understand and manage employee noise exposures within complex, continuously operating technology environments.
Multi-State Asbestos & Due Diligence Program
Citadel EHS supported a confidential national big-box retailer with a multi-state asbestos consulting and environmental due diligence program spanning 38 retail locations in California, Washington, and Hawaii. Services included field investigations, testing coordination, laboratory management, technical reporting, and centralized project tracking to support commercial activation and facility-improvement initiatives.
Healthcare System Occupational Exposure & Industrial Hygiene Consulting
Citadel EHS has provided industrial hygiene and indoor environmental quality consulting services for a health care facility client in Oregon since 2021, including occupational exposure evaluations, noise dosimetry, and technical review of facility-related health and safety concerns.
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.
Who we serve
Industries in Washington and Oregon
How we help
Services across Washington and Oregon
FAQ
Pacific Northwest FAQs
Does Citadel EHS serve both Washington and Oregon?
Yes. Citadel EHS has offices in Seattle, Washington and Portland, Oregon, and supports employers across both states as part of one Pacific Northwest practice.
Do I need an asbestos survey before renovating in Washington state?
Yes. Under WAC 296-62-07721, Washington building and facility owners must have an accredited inspector perform a good faith inspection for asbestos before construction, renovation, maintenance, repair, or demolition.
Who regulates workplace safety in Washington and Oregon?
Washington's workplace safety program is WA DOSH (L&I), formerly WISHA — a state plan that runs stricter than federal OSHA in areas like outdoor heat exposure and wildfire smoke. Oregon's program is Oregon OSHA, which adopted permanent heat illness prevention and wildfire smoke rules covering general industry, construction, and forest activities.
What industries does Citadel EHS serve in Seattle and Portland?
Our Seattle office supports aerospace and defense, data centers and technology, ports and maritime and logistics, life sciences and biotechnology, healthcare, and architecture, engineering, and construction clients. Our Portland office supports data centers and technology, industrial and manufacturing, food and beverage, healthcare, and architecture, engineering, and construction clients across Oregon.