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Drug & alcohol testing services

Maintaining a drug-free workplace and meeting DOT regulations isn’t just a necessity—it’s an investment in your business’s safety and success. Our comprehensive drug and alcohol testing programs cover every need, from pre-employment screening to random and post-accident testing, for both DOT and Non-DOT regulated industries.

Your all-in-one testing solution

We've got you covered

No matter the size of your business or the complexity of your testing needs, we have a solution for you. Whether you’re a small business making your first hire or a large corporation navigating complex DOT compliance, we make the process simple and reliable.

  • Urine testing

    The most cost-effective method for detecting recent drug use. Fast, reliable, and hassle-free results that you can count on.

  • Breath alcohol testing

    Instant results for detecting alcohol consumption. Ideal for post-accident or reasonable suspicion situations when immediate answers are critical.

  • Hair follicle testing

    Need a wider detection window? Hair follicle testing traces drug use for up to 90 days—providing the insight you need for long-term patterns.

  • Oral fluid testing

    A less invasive alternative to urine testing. Quick, accurate results with minimal risk of tampering.

Navigating DOT regulations? Let us handle it.

DOT compliance

Staying compliant with DOT drug and alcohol testing regulations can be complex, but we make it easy. Let us handle the details, so you can focus on running your business and keeping your employees safe.

Mobile on-site testing

Testing at your convenience—right at your doorstep. Our mobile drug and alcohol testing units are fully equipped and staffed by certified professionals, delivering accurate, efficient, and compliant testing right where you need it.

On-Site Mobile Drug & Alcohol Testing Unit Background
Fully equipped for accurate, on-site testing anywhere.

Easier for you, better for employees

Our mobile units offer a discreet and professional testing environment, minimizing downtime and maximizing productivity. You’ll get faster results, lower travel expenses, and a more comfortable experience for your employees.

Your business deserves a partner, not just a provider

Why choose Preferred Alliance?

When it comes to drug and alcohol testing, experience matters. Preferred Alliance has been a trusted partner for businesses across the United States for over 30 years. We’ve helped countless companies navigate the complexities of DOT compliance and create safer, more productive work environments.

  • Industry veterans

    With over three decades of experience, we’ve been at the forefront of employee screening since 1989, giving you the confidence to handle any testing needs.

  • Unwavering accuracy

    Precision is everything. We work with certified labs and follow rigorous quality control measures to guarantee reliable results—every time.

  • Stress-free compliance

    DOT regulations can be overwhelming. We make compliance simple, ensuring your testing program is always up-to-date and fully compliant.

  • True partnership

    We don’t just provide a service—we build long-lasting partnerships, committed to helping you create a safer, more productive workplace.

  • Simple billing

    No more headaches from multiple invoices. We offer one clear, consolidated bill for all your employee screening services.

  • Dedicated support

    Our knowledgeable team is here to guide you every step of the way, offering expert advice and answering any questions you may have.

Staff Shaking Hands with Client

Frequently asked questions

Ensuring a safe and compliant workplace is essential for any business, but the complexities of drug and alcohol testing can leave many employers with questions. Here, we address the most important and commonly asked questions to help you make informed decisions that protect your employees and your bottom line.

  • What industries require DOT drug and alcohol testing?

    We know that compliance is more than just a requirement—it’s a responsibility. Industries such as aviation, trucking, and public transit require DOT drug and alcohol testing to protect lives and ensure safety. Whether your employees transport goods, operate machinery, or handle sensitive operations, our testing programs ensure that you meet strict federal regulations with ease. Trust us to safeguard your business from costly non-compliance and ensure a safer work environment.

  • What is the difference between DOT and Non-DOT drug testing?

    We believe in keeping things simple for you. DOT drug testing is federally regulated and applies to employees in safety-sensitive positions—think transportation and public safety. It follows strict guidelines and typically tests for five specific substances. Non-DOT testing, on the other hand, is more flexible and can be tailored to your business’s needs. Whether it’s a 5-panel or 10-panel screen, we help you decide what’s best for your workplace. Whichever route you take, rest assured—you’re covered by experts.

  • How do random drug and alcohol tests work?

    Random testing is your company’s first line of defense against workplace substance abuse. We administer unannounced, random drug and alcohol tests using sophisticated selection software. Employees are chosen at intervals that align with your needs—monthly, quarterly, or annually. This unpredictability serves as a powerful deterrent, keeping your workforce sharp and focused. With our testing, you’re not just reducing risk; you’re creating a safer, more productive environment for everyone.

  • When are Non-DOT drug tests given?

    Non-DOT drug tests are all about flexibility. We offer testing options that fit your business’s needs. Pre-employment, random, post-accident—whatever you require, we have a solution. Non-DOT tests allow you to stay proactive, offering protection without the rigid mandates of DOT testing. And because every business is different, we work with you to customize a testing schedule that works—keeping your workplace safe and compliant at every turn.

  • How quickly can I expect drug test results?

    In business, time is money—and we know that waiting for results can cost both. That’s why we offer instant negative results through our point-of-collection testing. For presumptive positives, our certified labs deliver confirmed results within 24-48 hours. Fast, reliable, and efficient—because we understand that keeping your workforce moving is as important as keeping them drug-free.

  • What happens if an employee tests positive for drugs or alcohol?

    We follow strict procedures to ensure every positive test is handled with precision and confidentiality. If an employee tests positive, our Medical Review Officer (MRO) steps in to verify the result. For DOT-regulated employees, immediate removal from safety-sensitive duties is mandatory. We assist you every step of the way, ensuring compliance with federal laws and helping you navigate the complexities of workplace substance abuse. Protect your business, your employees, and your reputation with our trusted guidance.

  • When should you conduct post-accident drug and alcohol testing?

    Accidents happen—but substance abuse should never be the cause. We help you act swiftly. Post-accident drug and alcohol testing should be performed as soon as possible after an incident. Our team is ready to administer tests immediately, ensuring that any substances are detected before they leave the system. Don’t leave safety to chance—let us help you take control when it matters most.

  • Why is alcohol testing critical for safety-sensitive roles?

    In safety-sensitive roles, alcohol use can spell disaster. We offer DOT-compliant breath alcohol testing to ensure your employees are fit for duty. Our tests provide instant results, allowing you to take action immediately. For employees with a blood alcohol concentration over 0.04, federal regulations require immediate removal from duty. With our expertise, you can trust that your company remains compliant and your workforce remains safe.

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A safe and compliant workplace isn’t just a choice—it’s essential. Our expert drug and alcohol testing services make it easy for you to protect your employees, meet regulatory standards, and avoid costly mistakes. With fast, reliable results and a nationwide network, we provide everything you need to create a drug-free workplace.

Act now, and let us help you safeguard your business with confidence.

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