What an adventure Ph.D. has been! Last Friday, I successfully defended my doctoral dissertation entitled “Cybersecurity Games: Mathematical Approaches for Cyber Attack and Defense Modeling.” I want to thank my advisor Prof. Marten van Dijk, and my committee members Dr. Benjamin Fuller and Dr. Walter Krawec. Thank you for letting my defense be an enjoyable and memorable moment! Thanks for your encouragement, support, and insightful comments! I am also very excited to announce that I will be joining Google soon. I’m pretty sure that this is going to be a unique experience for learning, growing, and having lots of fun too. In Richard Feynman’s words, “The future is [so] unclear but exciting.”