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. Thrive: We empower our team with career growth opportunities, tuition assistance , and resources that support your wellness, education, and financi al well-being.