Jef Mast is a highly skilled knee and shoulder surgeon currently affiliated with Regionaal Ziekenhuis H Hart Leuven since October 2022, and serves as a Fellow in Knee and Shoulder Surgery at AZ Monica since March 2022. Previous experience includes a Fellowship in Shoulder and Elbow Surgery at AZ Sint-Jan Brugge-Oostende AV and roles as a resident in Orthopaedic Surgery at UZ Leuven and AZ Herentals. Jef Mast also held a position as a senior registrar in Orthopaedics and Traumatology at West Suffolk NHS Foundation Trust. Educational background includes a Master's degree in Medicine from the Faculteit Geneeskunde KU Leuven Faculty of Medicine.