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 Synapse Medical; Synapse Medical Ltd. is a leading distributor of medical devices for Cardiology, Neuroradiology, Endovascular, CT/MRI. read more