Employing 260 people across Ireland, Northern Ireland and the U.K., SISK Healthcare is one of the largest privately owned med ... ical device distributors. Our people are at the heart of who we are and together represent a committed, highly experienced and talented group of professionals. SISK Healthcare is the umbrella structure for four brands, one of which is Cardiac Services. Cardiac Services Group was founded in Belfast in 1969. WE provide intelligent medical devices and integrated clinical IT solutions to enhance patient safety throughout ireland and the UK. read more