Defence Operations Research Symposium are annual events devoted to the theory and practice of defence operations research and analysis. DORS13 is the fourteenth in the series. The Symposium is a principal part of the DSTO Operations Research Hub's ongoing professional development program for OR practitioners across Defence and provides a forum for networking within the Defence OR community of practice. In 2013 DORS will be held in conjunction with ASOR and MODSIM conferences providing an exciting opportunity for the Defence OR community to engage with broader modelling and simulation and the academic operations research communities. The theme for this year’s DORS is “Adapting to Change”.