Professor Fehily is the Clinical Director and lead surgeon at The Manchester Hip Clinic and practises at Spire Manchester. He specialises in surgery of the hip and has a particular interest in hip preserving or key-hole surgery and innovative hip replacements.

He is one of the leading hip arthroscopy surgeons in the UK and performs over 160 of these procedures a year, making The Manchester Hip Clinic one of the highest volume centres in the country. He has pioneered the use of stem cells in hip surgery to regenerate cartilage damage. 
He has pioneered the use Robotics in hip replacements and was the first person to carry out a MAKO robotic hip replacement in the North West of England and has the largest series to date. He performs the full range of hip replacement surgery from young patients with childhood disease to older patients who wish to maintain an active lifestyle.

Professor Fehily treats patients from all over the UK and internationally. He is the lead hip surgeon for the Hip and Groin Clinic, for the English Institute of Sport (Manchester), for the Armed Forces (Northern) and is a registered Consultant in the United Arab Emirates, having practiced in Dubai. He is the lead on many surgeon education courses, training other consultants from all over the UK and Europe in both key-hole and hip replacement techniques. He regularly treats high-level athletes, ranging from dedicated amateurs to Commonwealth, World Championship, Olympic and Premier League competitors. He regularly treats professional athletes from sports including football, rugby, taekwondo, squash and athletics amongst many others.
He is a keen educator and leads (lower limb) a Masters program at Salford University and has published many papers in peer reviewed journals. In 2017, The Manchester Hip Clinic (and Spire Manchester) was the only private hospital involved in a large multi-centre NHS trial into the effectiveness of hip arthroscopic surgery. He works closely with industry to develop new education programs, techniques and surgical devices to improve patient care.