DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Seattle, Washington Mobile Drug & Alcohol Testing
Boeing · Port of Seattle · SEA Airport FAA · BNSF/UP FRA · Amazon HQ · WA Marijuana Law Does NOT Cover DOT Workers
Seattle is one of America's most complex DOT employer environments — home to Boeing's commercial airplane headquarters, Amazon's global HQ, the Port of Seattle (one of the busiest container and cruise ports on the West Coast), Seattle-Tacoma International Airport (SEA), and major BNSF and Union Pacific rail operations. Washington State Initiative 502 legalized recreational cannabis in 2012 — but 49 CFR Part 40 governs every FMCSA, FAA, FRA, PHMSA, and FTA-regulated employee in Seattle regardless of state law. King County Metro and Sound Transit add FTA obligations. OnSite Employer Testing dispatches certified collectors to Boeing facilities, port terminals, airport ramp areas, and Amazon campuses throughout King County — no clinic commute for shift workers, ramp crews, or engineers.
OnSite Employer Testing coordinates mobile drug testing collections at your Seattle-area facility, yard, terminal, or job site. We do not operate a clinic. Review how it works or browse all locations we serve across the region.
The Pacific Northwest's Industrial and Tech Powerhouse
Seattle is one of America's most complex DOT employer environments — home to Boeing's commercial airplane headquarters, Amazon's global HQ, the Port of Seattle (one of the busiest container and cruise ports on the West Coast), Seattle-Tacoma International Airport (SEA), and major BNSF and Union Pacific rail operations. Washington State Initiative 502 legalized recreational cannabis in 2012 — but 49 CFR Part 40 governs every FMCSA, FAA, FRA, PHMSA, and FTA-regulated employee in Seattle regardless of state law. King County Metro and Sound Transit add FTA obligations. OnSite Employer Testing dispatches certified collectors to Boeing facilities, port terminals, airport ramp areas, and Amazon campuses throughout King County — no clinic commute for shift workers, ramp crews, or engineers.
FAA 14 CFR Part 120 governs all safety-sensitive aviation employees at SEA — a top-10 U.S. airport and Alaska Airlines' primary hub. FRA 49 CFR Part 219 applies to BNSF and UP crews at Seattle-area facilities. FTA 49 CFR Part 655 covers King County Metro and Sound Transit safety-sensitive workers. FMCSA 49 CFR Part 382 governs CDL drayage and freight fleets. USCG 46 CFR Part 16 applies to Puget Sound merchant mariners. Washington I-502 legalized recreational cannabis in 2012, but 49 CFR Part 40.151(e) prohibits MROs from canceling a DOT positive based on state law — marijuana positives still disqualify all DOT safety-sensitive employees.
Program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections.
Industries Served in Seattle
Aerospace manufacturing
Aerospace manufacturing — Boeing headquarters, Renton 737 plant, engineering. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Aviation
Aviation — Seattle-Tacoma International Airport (SEA), Alaska Airlines hub. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Technology
Technology — Amazon global HQ, Microsoft (Redmond), Google, Tableau. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Port and maritime
Port and maritime — Port of Seattle container terminal, cruise operations. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Railroad
Railroad — BNSF Interbay/King Street, Union Pacific. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Transit
Transit — King County Metro, Sound Transit Link/Sounder. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Construction
Construction — Seattle metro skyline and infrastructure projects. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Healthcare
Healthcare — UW Medicine, Swedish Health, Virginia Mason. We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the Seattle market.
Applicable RegulationsSeattle, WA
Employers in Seattle commonly coordinate testing under:
- FAA 14 CFR Part 120 — Pilots, flight attendants, dispatchers, A&P mechanics, ground security coordinators, and ramp crew at Seattle-Tacoma International Airport (SEA) — Alaska Airlines, Delta, United, Southwest, and cargo carriers
- FRA 49 CFR Part 219 — BNSF and Union Pacific engineers, conductors, dispatchers, and MOW employees at Seattle's King Street area and BNSF Auburn/Interbay facilities
- FMCSA 49 CFR Part 382 — CDL port drayage drivers, I-5, I-90, and SR-99 OTR and regional fleets serving Port of Seattle and King County distribution
- FTA 49 CFR Part 655 — King County Metro Transit and Sound Transit (Link Light Rail, Sounder commuter rail) safety-sensitive employees
- USCG 46 CFR Part 16 — Merchant mariners at Port of Seattle and Puget Sound ferry operations (coordination available)
- DOT Return-to-Duty & Follow-Up — SAP-supervised employees across all modes
Testing Services Available in Seattle
We coordinate the following collections for Seattle-area employers:
DOT drug testing collections (FMCSA, FRA, FAA, FTA, PHMSA)
- Pre-employment drug and alcohol testing
- Reasonable suspicion and return-to-duty testing
Breath alcohol testing (BAT certified)
- Oral fluid drug testing
Mobile and on-site collections at your facility, yard, or job site
On-Site Collections in Seattle
Pre-employment, Random, Reasonable Suspicion, Post-Accident — urine, oral fluid, and EBT
Washington State I-502 Compliance — Initiative 502 does NOT affect 49 CFR Part 40; marijuana positives disqualify DOT safety-sensitive employees regardless of WA state law
Boeing aerospace workforce panels — Renton, Everett, and Seattle Boeing campus pre-employment and random programs
Amazon and tech sector non-DOT panels — Seattle campus and fulfillment center workforces
Hair follicle and instant-result screening for high-volume tech and aerospace hiring
Use our instant quote calculator to scope your collection or visit our service areas page for broader coverage context.
Questions from employers in this region
Washington State legalized marijuana — does that affect our Boeing or Alaska Airlines employees' DOT testing?
No. Washington Initiative 502 has zero effect on federal DOT testing under 49 CFR Part 40. Marijuana positives are still disqualifying violations for Boeing FAA-regulated maintenance crews, Alaska Airlines pilots and mechanics, BNSF engineers, and all other DOT safety-sensitive employees.
Can you handle FAA testing for SEA airport crews — including Alaska Airlines and cargo ramp?
Yes. We enroll safety-sensitive aviation employees at SEA into FAA 14 CFR Part 120 compliant random pools and coordinate unannounced collections.
Do you serve King County Metro and Sound Transit under FTA 49 CFR Part 655?
Yes. FTA-compliant collections for King County Metro and Sound Transit safety-sensitive employees — operators, maintenance, and Signal/Track crews — are available throughout the Seattle area.
Can you handle Boeing pre-employment and random testing across Renton and Everett plants?
Yes. We coordinate Boeing-adjacent collections at the Renton 737 plant and Everett 747/787/777 facility. See also our Everett-WA page for North Sound coverage.
Core programs: Mobile & on-site drug testing, DOT drug testing, Non-DOT drug testing, Post-accident testing, Reasonable suspicion testing, Random testing programs, Breath alcohol testing. Planning: how it works, instant quote calculator, all locations. Industries: employer industries we support. Long-form answers: Employer drug testing FAQ. Quick questions: Contact us.
For how we think about regions and feasibility, see service areas.
Nationally coordinated collection support
OnSite Employer Testing is headquartered in Illinois and coordinates mobile and on-site employer testing across selected regions and employer locations—including through partner collectors when your program, timing, and geography allow. Availability depends on location, timing, test type, site access, collector availability, and scheduling needs.
Mobile Testing for Seattle's Most Demanding Employers
Boeing, Alaska Airlines, Port of Seattle, BNSF, Sound Transit, and Amazon — one call dispatches certified collections across the Pacific Northwest's most complex DOT employer base.