Ozren joined CMA in 2012. In his early role, he was responsible for managing all aspects of exam registrations for ABRSM, Trinity, and Rockschool, ensuring smooth communication between students, parents, and examination boards. In addition to his administrative duties, Ozren also oversaw the day to day running of the Take Note Bookshop. 

Currently, Ozren serves as the Manager at the CMA Academy, where he oversees daily functions. His responsibilities include scheduling, facilities coordination, staff support, and ensuring that both students and teachers have everything they need for a successful learning environment.