Jarno Casteleijn currently serves as Penningmeester at Festival de Fusie since July 2024 and as Medewerker Triple A at Johan Cruijff ArenA since September 2022. Prior experience includes a role as Junior Intercedent Johan Cruijff ArenA at Randstad from June 2020 to September 2021, and as Bediening at Restaurant Wereldsmaken All-in Live Cuisine Utrecht from September 2018 to June 2020. Additionally, Jarno Casteleijn completed an internship as Intercedent Johan Cruijff ArenA at Randstad between September 2019 and February 2020. Educational credentials include a Bachelor's degree in Chinastudies from Leiden University (2020-2025), a Bachelor's in Commerciële Economie with a specialization in Sportmarketing from Amsterdam University of Applied Sciences (2017-2022), a Minor in International Marketing from The Berlin School of Economics and Law (2020), and a Havo diploma in Natuur en Techniek from UniC Utrecht (2012-2017).