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Physicals
Training
DOT Compliance
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- Trucking
- Transportation
- Manufacturing
- Municipalities
- Medical
- Unions
- Construction
- Counties
- Security
- Retail

Testing
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Preferred Alliance ensures workplace safety and compliance through reliable drug and alcohol testing services. We specialize in DOT compliance and offer consolidated billing for streamlined efficiency. Serving businesses across various industries nationwide, we're your trusted partner for creating a drug-free workplace.

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Service office

16960 S Harlan Rd
Lathrop, CA 95330 (877) 272-5227

Corporate office

4160 Dublin Blvd # 400
Dublin, CA 94568 (877) 272-5227

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