MESAS'17 is a three-day scientific conference organized by the NATO Modelling and Simulation Centre of Excellence. The event will gather fully recognized experts from different domains: Military, Academia and Industry.Based on the results of the previous workshop, the main thopic sessions for this year are: Session A- Future Challenges and Opportunities of Advanced M&S Technology, Session B - Autonomous Systems and Swarming – Research, Development and (future) Application, Session C - Modelling and Simulation of Intelligent Systems – AI, Research, Development and Application, Session D - Autonomous Systems in Context of Future Warfare and Security – Concepts, Applications, Standards and Legislation.