Graduate of Royal College of Surgeons in Ireland, Dr Rezal, completed Basic Surgical Training in Midwestern Regional Hospital, Limerick, Ireland. He is the first Malaysian awarded, the Irish Scholarship for Research Fellow in University of Milwaukee and presented his research on Neuroblastoma in the Annual Congress Surgical meeting in New Orleans in 2003. He completed the MRCS(Ire) in 2007 and further obtained a Diploma in Laparoscopic Surgery in Strasbourg, France in 2006. He pursued in Master of Surgery in University Malaya, National Colorectal Surgery Fellowship and in 2022, completed Subspecialty Training in Advanced Colorectal and Peritoneal Malignancy with special interest in Cytoreductive Surgery (CRS) with Hyperthemic Intraoperative Chemotherapy (HIPEC) and Pressurized IntraPeritioneal Aerosol Chemotherapy (PIPAC) in HUKM and National Cancer Centre in Singapore and Singapore General Hospital respectively. He sits as a member of the European Society of Surgical Oncology, Academy of Medicine Malaysia,Malaysian Society of Colorectal Surgeons and International Society for the study of Pleura and Peritoneum (ISSPP).