Does Union Pacific Drug Test?

Drug Testing by Position

Drug Test Type and Process

Union Pacific uses a DOT-mandated 5-panel urine drug test administered through third-party collection sites. The screen looks for marijuana (THC), cocaine, amphetamines and methamphetamine, opioids, and PCP. Testing happens during the post-offer medical assessment, which UP's careers site describes as a health-history questionnaire, a medical exam, a urine/drug screen (about 45 mL of urine required), and a color-vision exam where the job requires it. The full post-offer process — medical assessment, background investigation, and any physical-ability test — can take 14 days or longer. Once hired into covered (safety-sensitive) service, you enter UP's ongoing FRA testing program, which includes unannounced random urine tests, post-accident testing after qualifying incidents, reasonable-suspicion testing, and return-to-duty/follow-up testing after any violation.

Marijuana Policy

Union Pacific enforces a strict, zero-tolerance marijuana policy that does not change based on where you live. Because railroad safety-sensitive positions are federally regulated by the FRA and DOT, marijuana remains a Schedule I controlled substance for testing purposes even in states that have legalized recreational or medical cannabis. A state medical-marijuana card is not a valid explanation for a positive THC result, and CBD products — which can contain enough THC to trigger a positive — are used at your own risk. A positive pre-employment test results in a rejected application, and applicants are generally ineligible to reapply for a period (historically six months). For current employees, a positive test is a serious rule violation that can end in dismissal, with reinstatement only possible through DOT return-to-duty procedures.

Tips for Applicants

Assume you will be tested — there is no railroad role at Union Pacific that skips the pre-employment drug screen, so do not accept an offer expecting an exception. If you use marijuana, stop well before applying; THC can remain detectable in urine for days to weeks depending on use, and there is no legal cover for railroad workers. Avoid CBD, hemp, and Delta-8 products entirely, since they can cause a positive result you cannot dispute. Bring valid photo ID to your collection appointment and be ready to complete the medical assessment promptly, because delays can stall your start date. If you have a prescription for a medication that could show up (such as amphetamine-based ADHD medication or opioid pain medication), disclose it to the Medical Review Officer with documentation. Apply through the official site at up.jobs.

Frequently Asked Questions

Does Union Pacific drug test for weed?

Yes. Union Pacific tests for marijuana (THC) on every pre-employment drug screen, and it enforces zero tolerance. Because railroad safety-sensitive jobs are federally regulated, marijuana is prohibited even if you live in a state where it is legal, and a medical-marijuana card will not excuse a positive result.

What kind of drug test does Union Pacific use?

Union Pacific uses a DOT-mandated 5-panel urine test collected at a third-party clinic. It screens for marijuana, cocaine, amphetamines/methamphetamine, opioids, and PCP. UP typically requires about 45 mL of urine for the sample.

Does Union Pacific do a hair follicle test?

For its federal DOT program, Union Pacific relies on urine testing rather than hair. The pre-employment medical assessment centers on a urine/drug screen. Some other Class I railroads use hair testing for pre-employment, but UP's DOT-covered testing is urine-based.

Does Union Pacific do random drug testing?

Yes. Employees in covered, safety-sensitive service are subject to unannounced FRA random drug and alcohol testing throughout their employment, in addition to post-accident, reasonable-suspicion, and return-to-duty testing.

How long does the Union Pacific hiring and drug test process take?

UP says the post-offer process — which includes the medical assessment (with the urine/drug screen), background investigation, and physical-ability test where applicable — can take 14 days or longer. Complete each step promptly to avoid delaying your start date.

Can I fail the Union Pacific drug test with a prescription?

Legitimate prescriptions are handled by a Medical Review Officer (MRO). If a legal, properly prescribed medication (like ADHD or pain medication) triggers a positive, disclose it with documentation and the MRO can verify it. Marijuana, however, is never accepted — even with a state medical card.