Mr Onwudike qualified in Ibadan Nigeria. His higher surgical training in general and vascular surgery was centred in London within the North East Thames Deanery between 1993 and 1999. He was a Research Registrar in Vascular surgery at the Hammersmith Hospital where he studied ischaemia-reperfusion injury and Specialist Registrar in the Vascular units of Whipps Cross Hospital, University College London Hospitals, St Bartholomew and Royal London Hospitals.
Mr Onwudike also benefited from a fellowship in endovascular surgery at Foundation Hospital Marseille, France. He has published papers and presented in national and international meetings. He was awarded the intercollegiate FRCS in general surgery with vascular subspecialty in January 1999 and the Certificate of Completion of Specialist Training (CCST) in June 1999.
Mr Onwudike has been a consultant Vascular Surgeon at Bolton Hospitals NHS Foundation Trust since 2000. His emergency and in-patient activities were transferred to MFT in 2014 and 2016 respectively following the sub-regional centralisation of vascular services. Mr Onwudike has vast experience in all aspects of vascular surgery including minimally invasive procedures for hyperhidrosis, thoracic outlet syndrome, carotid body tumours and vascular trauma. He is an examiner for both the MRCS in general surgery and FRCS in Vascular Surgery. He is active in surgical education and is at present the Royal College of Surgeons Tutor at Bolton.