- Doctor of Education, University of Tasmania, Australia
- Master of Music, University of Cape Town, Republic of South Africa
- Bachelor of Education, University of Canberra, Australia
- Postgraduate Diploma in Baroque Studies, Royal Conservatory of Music and Dance, The Netherlands
Dr. Postema has over 25 years' experience as a music educator, professional trumpeter and conductor. He has worked in international schools in many roles, including adult education. Darren is a duel citizen of both Australia and the Netherlands. He joined Dulwich College (Singapore) in 2014, along with his son who is in Year 2.