Provide support and guidance to HR staff, management, and other managers/supervisors when complex, specialized, and sensitive questions and issues arise; may be required to administer and execute routine tasks in delicate circumstances such as providing reasonable accommodations, assisting the investigation of allegations of wrongdoing, and terminations. Independently manage the DOT compliance portal, including coordinating required pre-employment testing, random testing, monitoring alerts and outstanding requirements, maintaining accurate records, and communicating issues to the safety team to ensure timely follow-up and resolution.