Hackensack Meridian Mountainside Medical Center is an 820,000-square-foot facility that offers the latest medical programs, cutting-edge technology, and patient-focused care that includes 365 beds, 1,200+ employees, and a 27-bed Emergency Room/Fast Track Unit. Responsibilities: The Security Officer role is responsible for performing a variety of safety and security functions related to the safeguarding of our employees, patients, visitors, physicians, and property.