Mr Karydis graduated from the medical school of the University of Athens, Greece in 2003 and qualified in general surgery in 2011, following the completion of his research degree (PhD). He then specialized in the UK in liver, pancreatic, and transplant surgery at the Freeman in Newcastle upon Tyne and Guy's and St Thomas' in London. He joined the transplant team at Guy's as a consultant in 2014. In 2016, he was awarded an Honorary Senior Lecturer position at King's College London and has an active research portfolio in vascular access and pancreas transplantation. He performs kidney and pancreas transplantation as well as advanced vascular access and peritoneal dialysis procedures in patients with end-stage kidney failure. He also performs minimally invasive ("keyhole") donor nephrectomies in people donating a kidney to a relative or friend. His clinical consultations include assessment for kidney donation and kidney transplantation, post-donation and post-transplant follow-up, and assessment for vascular access for hemodialysis and peritoneal dialysis. His expertise includes kidney transplantation, laparoscopic donor nephrectomy, advanced vascular access for hemodialysis, and minimally invasive peritoneal dialysis catheter insertion.