The Agility of a Mobile Fleet. The Power of a Manufacturer
We are changing the landscape of occupational health by bringing manufacturer-direct compliance and testing solutions directly to the Southern California workplace.
Why ONE Mobile Testing?
For years, corporate HR and Safety Directors have been forced to choose between two imperfect options: send employees to crowded, off-site clinics (losing hours of productivity) or hire small, independent mobile collectors who lack the supply chain and financial stability required for enterprise-level contracts.
ONE Mobile Testing by American Green Spring Diagnostics Inc. was created to eliminate that compromise.
As a wholly-owned subsidiary of American Green Spring Diagnostics—a global leader in medical diagnostics and test manufacturing—we cut out the middleman. We combine an elite, locally dispatched fleet of certified collectors with the supply chain, laboratory infrastructure, and clinical oversight of a massive diagnostic manufacturer.
The ONE Mobile Advantage: Local Roots. Global Backing.
Manufacturer-Direct Supply: Because our parent company manufactures the diagnostic equipment, our clients never face supply chain shortages, backorders, or middleman markups.
Uncompromising Compliance: From CLIA-waived laboratory standards to strict federal DOT (49 CFR Part 40) Chain of Custody protocols, our medical and legal oversight is bulletproof.
Rapid Local Dispatch: Headquartered in San Dimas, our fleet operates 24/7 across Los Angeles, Orange County, and the Inland Empire, responding instantly to post-accident and reasonable-suspicion emergencies.
Zero Downtime: We keep your workforce on your campus, protecting your productivity and reducing off-site liability.
Leadership
Meet Our Leadership
Shawn O’Neill, Director of Marketing & Sales
Bio: Shawn O’Neill is the founder of ONE Testing Services, with extensive experience in DOT and non-DOT drug and alcohol testing operations. He has built and managed high-volume testing programs, supporting employers with compliant, efficient on-site screening solutions.
With deep expertise in on-site logistics, chain-of-custody protocols, and multi-location program execution, Shawn has overseen thousands of collections and helped organizations streamline compliance while minimizing operational disruption. His leadership ensures enterprise clients receive reliable, audit-ready testing solutions at scale.
As Director, Shawn bridges the gap between our clinical laboratory operations and our corporate clients. He ensures that whether we are servicing a major municipal transit authority like Metrolink or a local staffing agency, every client receives a tailored, frictionless, and fully compliant occupational health program.
Our Corporate Promise
"Our mission is simple: to protect your workforce, your compliance status, and your bottom line. By bringing the clinic to your terminal, warehouse, or office, we ensure that safety never comes at the cost of productivity."– American Green Spring Diagnostics Inc.
Call to Action: Partner With the Industry Leaders
Stop losing hours to the waiting room. Contact our team today to discuss dedicated mobile routes, emergency dispatch contracts, and custom testing supply integration.
[Button]: Request a Corporate Quote (Link this to your Contact Page form)
Begin Your Transformation
Submit the inquiry form to discuss your objectives and determine how a tailored consulting engagement can advance your strategic priorities.