Nontas received his M.Sc. in Applied Informatics with a specialization in Computer Systems. Previously he had received his Bachelor degree in Automation Engineering from the Technological Educational Institute of Thessaloniki.
From January 2008 until December 2011 he worked as a Software Engineer for Siemens Enterprise Networks. He was member of the platform team, being responsible for the system upgrades. Since January 2012 he is employed by BETA CAE Systems.