He has a special interest in the surgery of arthritis, including primary and revision joint replacement, surgery of the spine, and tumour surgery. It was his passion for hip and knee surgery that remained the focus of his career- much of his work was in the speciality of hip and knee joint replacement surgery, including revision joint replacement. His passion for hip surgery led to the development of the DTC Margron Hip Replacement System for which he was awarded the Medal of the Order of Australia for his services to health.

Dr Sekel was the Registrar Training Supervisor to the Orthopaedic Department at Pacific Private Hospital. He is a Member of the Australian Orthopaedic Subspecialty groups for Arthroplasty and Hip Knee.

In addition, he became involved in the development of the aerial obstetric emergency retrieval service in New South Wales which provided rapid emergency services to outlying country towns (this was taken over by the Air Ambulance in 1986). In 1994, he started the New South Wales Bone Bank as Inaugural Honorary Director.

Dr Sekel provides expert medical opinion on the bio-mechanical aspects of surgeries involving prosthesis. This includes fracture of a prosthesis, the cause of a prosthesis failure, design problems with prosthesis or a manufacturing problem, the use of an unsupported revision stem, and metal on metal prosthesis problems. He provides opinion on prosthesis’ of the hip knee and ankle, as well as other Orthopaedic complications.