Workplace testing
We Come to You — On-Site Drug & Alcohol Testing for Employers
OnSite Employer Testing provides mobile drug and alcohol testing for businesses. We send certified collectors to your workplace, warehouse, construction site, or fleet yard — so your employees don't have to leave work to go to a clinic. We handle DOT-regulated testing and standard workplace (non-DOT) testing across Illinois and select regions nationwide.
View services · How it works · Service areas
Need a starting point? View common panels, book a consultation, or Contact us.
Why Skip the Clinic?
Sending employees to a drug testing clinic costs you more than you think. There's travel time, waiting room delays, missed shifts, and no-shows. When we come to you, testing takes less time, employees stay closer to the job, and HR stays in control.
- Tests done at your location — no travel required
- Works around your shift schedule
- Covers DOT and non-DOT programs
- Available for post-accident, random, pre-employment, and reasonable suspicion testing
Who we work with
Who We Work With
We work with HR managers, safety directors, fleet operators, and staffing companies across industries including:
- Transportation & trucking (FMCSA/DOT programs)
- Warehousing & distribution centers
- Construction & job sites
- Manufacturing plants
- Professional offices
By industry: Browse industries · Transportation · Warehousing · Construction
Common programs
Testing from your site
DOT and non-DOT programs for post-accident, random, pre-employment, and reasonable suspicion testing—each link spells out scope and when to use it.
How it works
How It Works — 3 Simple Steps
- 1Tell us what you need — share your location, number of employees, and testing type
- 2We confirm and schedule — we check availability and set a collection window
- 3We come to you — a certified collector arrives at your site with all paperwork and supplies
Program guides
Read by program
Each page covers triggers, paperwork, and how a draw usually fits a warehouse line, yard, or job-site trailer—not a walk-in clinic. Start with mobile and on-site drug testing, then the full services list. Coverage: locations · service areas. Compare DOT vs non-DOT or the employer guide.
Breath alcohol, oral fluid, hair, PEth, blood, nail, and similar tests follow different timing and rules—see the specialized section on services. More depth in resources.
Industries
Fleets, warehouses, staffing, and job sites
Places where clinic runs cost coverage and floor time. Short write-ups by sector live on the industries hub.
Frequently Asked Questions
- What is on-site drug testing?
- On-site drug testing means a certified collector comes to your workplace to collect specimens — urine, oral fluid, or breath alcohol — instead of sending employees to a clinic. It's faster, less disruptive, and easier to manage.
- Do you do DOT drug testing?
- Yes. We conduct DOT-regulated drug and alcohol testing under 49 CFR Part 40 for employers covered by FMCSA, FAA, FRA, FTA, PHMSA, and USCG programs.
- What areas do you serve?
- We're headquartered in Rolling Meadows, Illinois and provide mobile testing across the Chicago metro area, Midwest, Texas Gulf Coast, Southeast Florida, and West Coast regions.
- How do I get started?
- Call us at (219) 315-0345 or fill out our quote request form. We'll respond with a clear plan based on your location and testing needs.
Ready to schedule?
Call us at (219) 315-0345 or request a quote. We'll respond with a clear plan based on your location and testing needs.