margin-of-error-verified lab analysis designed to support hiring decisions, random screening programs, post-incident investigations, and return-to-duty evaluations. Elssi also provides mobile collection services, allowing testers to administer on-site drug and alcohol screens at workplaces, events, or remote locations, and supports occupational health monitoring through coordinated scheduling, reporting, and record-keeping tools. In addition to testing, Elssi supplies certified training and certification programs for collection agents and supervisors to help organizations maintain regulatory compliance and best practices in safety-sensitive environments. The company pairs its laboratory and field services with digital scheduling, secure result delivery, and program management capabilities to help employers streamline substance-use policies and enhance workplace safety.