Kars was born in the Netherlands in 1986. Just like his father (ENT Specialist) and mother (General Practitioner) he started his study medicine and graduated at the University of Groningen in 2012. After two years of gaining experience in acute medicine and child psychiatry he started his General Practitioner training at the Radboud University in Nijmegen.  He graduated in 2017 and worked as a locum GP in several Dutch practices for 2 years.

Kars and his wife Charlotte (who is also a GP at Otaki Medical Centre) decided to make a life changing move by coming to New Zealand with their two sons.