In the same year he started his residency training in the Department of Surgery at Lagos University Teaching Hospital (LUTH) Lagos.
During his training Programme in LUTH he proceeded to the Commonwealth Postgraduate Medical College, Hammersmith London where he did his attachment and courses in Cardiothoracic and Vascular Surgery (1976 – 78).
He became one of the Foundation Fellows of the National Postgraduate Medical College by examination in the Faculty of Surgery (Cardiothoracic Surgery) in 1977.
He was the Secretary-General of Nigerian Medical Association (NMA) 1977, Consultant Surgeon, Ada Hospital Lagos 1978-80, Chairman, Continuing Medical Education Committee National Postgraduate Medical College of Nigeria (1980-84) and Convener, Faculty of Surgery National Postgraduate Medical College of Nigeria (1994-2002).
Dr. L.I.D. Kufeji is the immediate Past Chairman Faculty Board of Surgery ( 2003 to 2007).
He is the Medical Director and Chief Executive Officer of St. Martin De Porres Medical Centre Mushin, Lagos, a Hospital he established in 1980.
He is a Consultant Surgeon to Finnih Medical Centre Ikeja and Patella Hospital Onike Lagos.
At present he is the Chairman Board of Cardinal Okogie Medical Centre, New Oko-Oba, Agege, Lagos.
Dr. L.I.D. Kufeji is a member of many National and International bodies which include
- Nigerian Medical Association
- Medical and Dental Consultants Association
- Lions Club International
- Knight of St. Mulumba
- Knight of St. Gregory The Great
He is a researcher and resource person in Hospital Management and Training.
On Friday 7th December, 2007 Dr. Leonard Idowu Dovi Kufeji, FMCS was elected the College Vice President for a two-year term with effect from 1st of January, 2008.
He is happily married with children.