Mark has performed over 2000 shoulder arthroscopies and pioneered modified techniques for arthroscopic rotator cuff and labral repairs. He has presented his research and clinical experience at 20 major national and international orthopaedic conferences, winning best paper awards including an Australian national shoulder meeting and the ISAKOS Caspari award in Japan. His ongoing research now focuses on rigorous postoperative evaluations, looking at ways to optimize the procedure and rehabilitation. This has recently been published internationally in The Journal of Shoulder and Elbow.