OnSite Employer Testing logo — on-site and mobile employer drug and alcohol testing services
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About

A partner for employers who take testing seriously

We built OnSite Employer Testing around field execution: clear instructions for donors, respectful collectors, and paperwork that holds up when programs are reviewed.

Drug testing is rarely the centerpiece of your week — until something goes wrong. Our job is to make the operational side predictable: who is testing, where collections happen, how chain-of-custody is handled, and how your DER or administrator receives documentation.

We work with safety-sensitive employers across transportation, construction, manufacturing, and professional services. Whether you are standing up a new policy or replacing a vendor that missed too many windows, we focus on communication first.

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Professional employer drug and alcohol collection room: gloved collector prepares sealed specimen supplies at a table across from a donor while a supervisor documents the visit on a tablet; refrigerated biological-sample transit bag and organized clinical storage reinforce chain-of-custody discipline.
Supervised collections, clear documentation, and secure specimen handling—the field standard we bring to employer programs.

Tell us about your program

We will ask for DOT vs non-DOT context, roster size, and geography — then propose a practical collection approach.

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