Cataldo Ambulance Service Inc. | 3,098 followers on LinkedIn. Providing Exceptional Care through Clinical Excellence Since 1977 | Since 1977, Cataldo Ambulance Service, Inc. has continually distinguished ourselves as a leader in providing routine and emergency medical services. As the needs of the community and the patient change, we continue to introduce innovative programs to ensure the highest level of care is available to everyone in the areas we serve. Cataldo is the largest private EMS provider and private ambulance service in Massachusetts.