Professional testing solutions for a safer, more prepared workplace.
DOT and non-DOT testing options for employers, organizations, and individuals—delivered with careful collection procedures, confidentiality, and dependable coordination.
Request Testing ServicesTesting support for different workplace situations
The appropriate test depends on your policy, industry, reason for testing, required panel, and applicable regulatory program. GOS helps coordinate the collection and testing option that fits your needs.
Pre-Employment
Testing completed as part of an employer’s established pre-employment screening process.
Random Testing
Unannounced testing administered according to an employer policy or applicable regulated program.
Post-Accident
Time-sensitive testing following a qualifying workplace or transportation-related incident.
Reasonable Suspicion
Testing requested after an employer documents specific observations consistent with its policy.
Return-to-Duty
Testing required before an employee returns to safety-sensitive duties under an applicable process.
Follow-Up Testing
Testing conducted according to an established follow-up schedule or program requirement.
Choose the method that fits the purpose
Detection windows, substances tested, collection procedures, and laboratory confirmation vary by method and selected panel. We’ll help identify the appropriate option.
Urine Drug Testing
A widely used option for DOT and non-DOT workplace testing with multiple panel choices.
Oral Fluid Testing
An observed collection option that may be useful for detecting more recent drug use.
Hair & Nail Testing
Longer-window options that may provide information about a broader history of drug exposure.
Breath Alcohol Testing
Breath testing used to measure alcohol concentration at the time the test is administered.
More than a single collection appointment
GOS can help employers coordinate essential pieces of their workplace testing process while working within the employer’s policy and selected testing program.
A clear, professional testing process
Exact steps vary by specimen type and testing program, but most services follow this general process.
Confirm the Test
We verify the reason, authority, panel, specimen type, and collection requirements.
Complete Collection
The donor completes the required collection and chain-of-custody documentation.
Receive Results
Results are reported through the appropriate laboratory, MRO, or authorized process.
Need a test or an employer testing program?
Tell us who needs testing, why the test is required, and whether it is DOT or non-DOT. We’ll help you determine the appropriate next step.
Request a Testing Consultation
