Tomas joined MSF a couple of months after the Haiti earthquake in 2010. He then did two missions in the country as general surgeon and orthopaedic surgeon. Recently he has returned to work in the Kunduz Trauma Centre in northern Afghanistan where he spent much of 2013. The trauma centre specialises in providing free and high quality surgerical care for victims of general trauma like traffic accidents, as well as those with conflict-related injuries, from bomb blasts or gunshots.

Tomas is from the Czech Republic. He graduated from Charles University in 2002 with a medical doctor diploma and now works as a general surgeon consultant in Prague Municipality Hospital of St. Francis. Tomas has acquired his general surgery experience in a couple of hospitals in the Czech Republic. In 2012 he worked for Mater Misericordiae University Hospital in Dublin as an orthopedic surgeon at Irish National Spinal Unit.