After a positive test, refusal, or other DOT violation, you are required to register your suspension with the Federal Drug & Alcohol Clearinghouse at clearinghouse.fmcsa.dot.gov — then complete your SAP evaluation to begin the path back to safety-sensitive duty.
If you've tested positive for drugs or alcohol — or refused a DOT-mandated test — federal law requires you to complete a Substance Abuse Professional evaluation before returning to any safety-sensitive position. This includes commercial truck driving, aviation, rail, transit, pipeline, and maritime roles.
Only a federally-qualified SAP listed on the DOT's approved provider network can complete this process. Bonnie Mucklow is a fully-qualified SAP serving the Denver area, ready to guide you through every step.
Important First Step
After receiving a positive test, refusal, or other DOT violation, you must first register your suspension with the Federal Drug & Alcohol Clearinghouse before beginning your SAP process.
clearinghouse.fmcsa.dot.gov →
Same-week appointments available. We'll confirm your appointment within one business hour.
We guide you through every federally-required step — clearly, professionally, and without judgment.
After your violation, go to clearinghouse.fmcsa.dot.gov to register your suspension with the Federal Drug & Alcohol Clearinghouse. This is required before your SAP process can begin.
Meet with Bonnie at her Denver office for your comprehensive SAP assessment. She reviews your clinical history, the DOT violation, and all relevant factors per 49 CFR Part 40.
Based on your evaluation, Bonnie provides a written recommendation — from a brief education program to structured outpatient treatment depending on your results.
You complete the recommended education or treatment program. Bonnie can connect you with appropriate local resources and monitor your compliance throughout.
Bonnie conducts your follow-up evaluation and, when compliant, issues your Return-to-Duty recommendation to your employer's Medical Review Officer.
Bonnie Mucklow has spent over two decades helping individuals and families navigate some of life's most challenging moments. As a DOT-qualified Substance Abuse Professional, she brings the clinical expertise required by federal regulation and the personal warmth that makes an intimidating process feel manageable.
Her role as your SAP is not to judge — it's to conduct a fair, thorough evaluation and help you get on the fastest, fully-compliant path back to the work you depend on.
"Bonnie Mucklow is one of the most outstanding therapists in Denver. I've known and worked with her for more than 20 years and recommend her highly and without qualification."
— Aubrey, Families at Five Client
Same-week appointments available. A single call is all it takes to get started on your path back to safety-sensitive duty.