Company Description. Mather Hospital is a 249-bed community teaching hospital located in Port Jefferson, NY, known for its Magnet® recognition from the American Nurses Credentialing Center (ANCC) for quality patient care and nursing excellence. The hospital offers advanced medical care in areas such as bariatrics, neurosurgery, orthopedics, pulmonology, robotic surgery, mental health, and emergency services. Mather also collaborates with New York...