Founded in 1969, Professional Ambulance & Oxygen Service provides emergency medical services in association with the fire, police, emergency, communications and public health departments. It also provides nonemergency transportation services for Cambridge Health Alliance and Mount Auburn Hospital. The company has a fleet of more than nine ambulances. Professional Ambulance operates a staff of over 40 paramedics and field personnel. It also operates the operations, staff development and billing departments. The company s operations department offers field operations, fleet management and support services. Located in Cambridge, Mass., Professional Ambulance also provides emergency medical services for festivals, conventions and special events.