Tomas Grinevicius was born in 1980 in Lithuania. He obtained a Master's Degree in Telecommunication and Electronics from Kaunas University of Technology.

Tomas started his career as an engineer in a solution integration company and was promoted to technical project leader after a few years. He gained experience in different fields: VoIP, LMDS, synchronisation, network security, billing, mediation and integration into solutions for customer needs.

Since 2006, Tomas has been working at Telia as a telephony network and services development expert and architect. He had various responsibilities related to voice and messaging network and service transformation, evolution, strategy development, and its execution. His main fields are smooth IMS environment development and ensuring ecosystem quality, safety and performance.