A Trusted Partner in Workplace Safety & Compliance
On Time Specimen Lab LLC was built to provide fast, reliable, and professional testing services that businesses and individuals can depend on. Based in Houston, Texas, we specialize in mobile drug testing, workforce screening, and medical specimen collection designed to keep organizations compliant and running efficiently.
With a strong commitment to accuracy, integrity, and timely service, we partner with trusted laboratories to deliver dependable results and a seamless experience from start to finish.
Workplace Screening Solutions
Fast, Reliable
Results for Employers
95%
of rapid test results delivered the same day
90%
reduction in employee downtime
100+
businesses and individuals served
How It Works
Simple Process Complete Testing Solutions
Choose Your Service
Select one of our many mobile
and onsite testing services
Schedule Your Appointment
Book in-office or request on-site mobile testing
We Collect & Process
Our team performs a secure, professional specimen collection
Receive Your Results
Receive your confidential and reliable test results
Professional Testing &
Workforce Screening Solutions
We provide fast, reliable, and compliance-focused services designed to help employers, agencies, and individuals get accurate results—on time, every time.
Drug & Alcohol Testing
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DOT Drug Testing
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Non-DOT Drug Testing
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Rapid Panel Testing
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Alcohol Testing (BAT, ETG)
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Lab Confirmations
Mobile Testing Services
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On-Site Testing
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Post-Accident Testing
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Random Testing (Groups)
Pre-Employment Screening
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Background Checks
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MVR Reports
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Employment Screening
DNA & Specialty Testing
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Paternity Testing
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Legal DNA Testing
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Gender Reveal Testing
Additional Services
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Fingerprinting
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Notary Services
Medical & Lab Services
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Phlebotomy
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Wellness Panels
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EKG Testing
Compliance You Can Count On
We understand the importance of meeting industry regulations without slowing down your business. Our testing and screening solutions are designed to simplify compliance, reduce risk, and give you confidence in every result.
From DOT and Non-DOT drug testing to background screening and mobile collection services, we provide reliable, accurate, and timely support tailored to your needs. With a focus on professionalism, efficiency, and secure reporting, we help you stay compliant while keeping your operations running smoothly.
Mobile Convenience
We come to your location to perform testing on-site, saving you time and keeping your team productive.
Fast Turnaround Times
Rapid testing options and efficient processing help you get results when you need them most.
Compliance Services
We support DOT and Non-DOT requirements to help you maintain a safe and compliant workplace.
Professional Service
Our experienced team ensures accurate collection, secure handling, and reliable reporting every time.
Our Trusted Lab Partners
