What Is DISA Drug Testing and How Does It Work?

DISA drug testing is a screening program run by DISA Global Solutions, a third-party administrator that manages drug and alcohol testing for employers in oil and gas, construction, transportation, and other high-hazard industries. When you test under one member company, your result goes into a centralized database, and other companies in the DISA Contractors Consortium generally accept it. The system produces an eligibility status that site owners check before letting anyone onto a job site, so passing or failing a DISA test does not just affect one job — it affects whether you can work anywhere in the network.

How One Test Covers Multiple Employers

The DISA Contractors Consortium is a group of member companies that agree to follow a single set of drug and alcohol testing rules. A pipeline welder tested for one refinery does not need a brand-new screening for every project at a different facility inside the network. This arrangement is sometimes called reciprocity.

Consortium standards tend to be stricter than a typical corporate drug policy, because they are built for environments where a single mistake can cause serious injury or a facility-wide disaster. The same objective criteria apply across thousands of employers, so your eligibility does not shift based on which member company sponsors your test.

When You Can Be Tested

DISA testing follows the categories set by the Department of Transportation for safety-sensitive workers. Private employers can add their own occasions on top.

Pre-employment. Required before you perform any safety-sensitive work. Your employer must receive a negative result before you start.
Random. A computer-generated process can select you at any time, and everyone in the pool has an equal chance of being picked.
Post-accident. Always mandatory after a fatal accident. For accidents involving bodily injury or a vehicle tow-away, testing is required if you receive a traffic citation within the applicable time window.¹
Reasonable suspicion. A trained supervisor can require a test based on specific observed signs, such as appearance, behavior, speech, or body odor.¹
Return-to-duty. Required before you can resume safety-sensitive work after a violation.
Follow-up. A series of unannounced tests after you return to duty, scheduled by a Substance Abuse Professional.

What to Bring and What Happens at the Collection Site

Bring a valid government-issued photo ID: a state driver’s license, passport, or similar document. You also need a Federal Drug Testing Custody and Control Form, the official chain-of-custody document that tracks your specimen from collection through final results. Your employer or its DISA administrator generates the form through the DISA portal, and it carries barcodes and identification numbers tied to your employer’s account.

Check the details before you go. If your name, identification number, or the employer’s billing information is wrong, or if you show up without proper ID, you will typically be turned away and wait one to three business days for your employer to reissue the paperwork.

Before you provide a specimen, the collector secures the collection area to prevent tampering. For a urine test, federal rules require disabling water sources, adding blue dye to the toilet, removing soap and cleaning products, and checking for hidden materials that could be used to adulterate a sample. Once you provide the specimen, the collector splits it into two bottles in your presence: a primary specimen of at least 30 mL and a secondary “split” specimen of at least 15 mL. Both are sealed with tamper-evident labels and matched to your Custody and Control Form.²

The sealed specimens are shipped by secure courier to a laboratory certified by the Department of Health and Human Services. The lab runs an initial immunoassay screening. If a substance exceeds the cutoff, the lab performs a second, more precise confirmatory test, typically using mass spectrometry, before reporting anything as positive. A Medical Review Officer then reviews every non-negative result to see whether a legitimate medical explanation, such as a valid prescription, applies. Results usually reach the employer within one to three days of collection.

What the Lab Tests For

If you work in a DOT-regulated role, the lab runs a strict five-category panel: marijuana, cocaine, opioids (including codeine, morphine, hydrocodone, hydromorphone, oxycodone, oxymorphone, and heroin), amphetamines (including methamphetamine, MDMA, and MDA), and phencyclidine. No other substances may be tested on a DOT specimen.² Each substance has a specific cutoff that must be exceeded on both the initial and confirmatory tests. For marijuana metabolites, the initial screening cutoff is 50 ng/mL and the confirmatory cutoff is 15 ng/mL.³

Private employers not covered by DOT rules can expand the panel to include benzodiazepines, barbiturates, or additional synthetic opioids. DISA administers both types, and DOT and non-DOT specimens are always collected and processed separately.

For DOT-regulated testing, only urine and oral fluid specimens processed at HHS-certified labs are authorized. Hair follicle testing is explicitly prohibited under federal DOT rules.⁴ Oral fluid collection was authorized by a DOT final rule effective December 2024, though full implementation depends on HHS certifying laboratories to process oral fluid specimens.⁵ Urine remains the most common method. Non-DOT employers have more flexibility and may use hair testing, which detects use over a longer window, or oral fluid, which is better at catching very recent use.

Marijuana Even Where It Is Legal

A positive marijuana result on a DOT drug test is still treated as a violation, no matter what your state’s laws say. The DOT has stated that state marijuana laws have no effect on its regulated testing program, and marijuana remains a Schedule I controlled substance under federal law. Medical Review Officers are specifically prohibited from accepting a state medical marijuana recommendation as a valid explanation for a positive.⁶ If you hold a medical marijuana card and work a DOT-regulated position, off-duty use still puts your eligibility at risk. Many non-DOT consortium members in high-hazard industries also continue to test for marijuana regardless of state law, because their safety standards are tied to federal requirements.

What Your DISA Status Means

DISA converts your test results and compliance history into a status any consortium member can check.

Active (green). You have met all consortium requirements and are cleared for site access.
Inactive (red). You are barred from job sites, typically because of a failed test, a refusal, or another policy violation.
Pending (yellow). Results are still being processed or additional documentation is needed.

Because the data is centralized, an Inactive status at one facility follows you across the network. You cannot move to a different consortium employer and start working around it.

What Counts as a Refusal

Under DOT rules, certain actions are treated exactly the same as a positive result. You are considered to have refused a test if you fail to show up within a reasonable time after being directed to test, leave the collection site before the process is complete, or fail to provide a specimen. A specimen the lab reports as adulterated or substituted is also classified as a refusal.⁷ Consequences match those of a verified positive: immediate removal from safety-sensitive duties and a mandatory return-to-duty process before you can work again.

One narrow exception: if you leave the collection site before the testing process has actually begun for a pre-employment test, that departure is not automatically treated as a refusal.⁷ For every other testing occasion, leaving early triggers the full consequences.

Disputing a Positive Result

If the MRO notifies you of a verified positive result, you have 72 hours from that notification to request that your split specimen be sent to a different HHS-certified laboratory for independent testing. The request can be verbal or written. If you miss the 72-hour window, you may still request the test by showing that a serious illness, lack of actual notice, inability to contact the MRO, or other unavoidable circumstances prevented a timely request.⁸

Your employer is responsible for making sure the split test happens once you make a timely request. The employer cannot require you to pay upfront as a condition of ordering the test, though it may later seek reimbursement through a written policy or collective bargaining agreement.⁹

The MRO review itself exists to catch legitimate prescriptions before a result is reported. You can present evidence during that review that a prescribed medication caused the positive. The Americans with Disabilities Act also protects workers who take legally prescribed medications, including medication-assisted treatment for opioid use disorder, from being fired solely because of a positive test for that substance, provided the medication is taken under professional supervision and you can perform the job safely.¹⁰

Because DISA functions as a consumer reporting agency, an employer that denies you a job or removes you from a project based on your DISA report must follow the Fair Credit Reporting Act’s adverse action process. That means a pre-adverse action notice with a copy of the report and a summary of your rights, a reasonable window (generally around five business days) to review and dispute the information, and a final adverse action notice identifying DISA and explaining your right to obtain a full copy of your file and dispute inaccuracies.

Getting Back to Active After a Violation

If your status flips to Inactive, returning to Active takes several steps over a required waiting period.

Under the DISA consortium’s own policy, a first violation carries a six-month suspension from the date of the violation. A second violation within five years of the first triggers a three-year suspension.¹¹ You cannot begin a return-to-duty test until the full suspension has passed and you have completed a Substance Abuse Professional evaluation and any recommended treatment.

A DOT-qualified SAP evaluates you, recommends education or treatment, and then re-evaluates you to confirm compliance. Only then can you take the return-to-duty test. If you pass, you can resume safety-sensitive work, but follow-up testing is part of the deal. The SAP must schedule at least six unannounced follow-up tests during your first 12 months back, and follow-up testing can continue for up to 48 additional months at the SAP’s discretion.¹² Under the DISA consortium policy, each follow-up test is conducted under direct observation.¹¹

1
Federal Motor Carrier Safety Administration. Testing Types and Requirements
2
eCFR. 49 CFR Part 40 – Procedures for Transportation Workplace Drug and Alcohol Testing Programs
3
U.S. Department of Transportation. 49 CFR Part 40 Section 40.85
4
U.S. Department of Transportation. 49 CFR Part 40 Section 40.210
5
U.S. Department of Transportation. Part 40 Final Rule – DOT Summary of Changes
6
U.S. Department of Transportation. DOT Medical Marijuana Notice
7
eCFR. 49 CFR 40.191 – What Is a Refusal to Take a DOT Drug Test, and What Are the Consequences
8
U.S. Department of Transportation. 49 CFR Part 40 Section 40.171
9
U.S. Department of Transportation. 49 CFR Part 40 Section 40.173
10
ADA.gov. The ADA and Opioid Use Disorder: Combating Discrimination Against People in Treatment or Recovery
11
DISA. Return to Duty FAQs – Consortium
12
U.S. Department of Transportation. 49 CFR Part 40 Section 40.307