Prior to establishing his own law firm in 2016, Filip had worked at other leading international law firms in Serbia and Germany. In 2012, he started specializing in sports law, representing footballers before the Court of Arbitration of the Football Association of Serbia (the “NDRC”). Filip has an extensive expertise in international sports law – he worked at Martens Rechtsanwälte, where he focused on CAS appeal procedures and BAT arbitrations, which helped him acquire a significant knowledge on the ex aequo et bono principle. Furthermore, he participated in CAS appeal procedures, including cases with case files in Spanish. In addition to this, Filip has been acting as an arbitrator of the NDRC since 2017, where he was able to gain valuable experience as an adjudicator. Since 2016, Filip has been regularly acting as a counsel in disputes before FIVB, CEV, Serbian Volleyball Federation, BAT, FIFA and CAS, where he has successfully handled over 50 cases.