Environmental security notions have evolved over the past 30 years. Once a sub-field of Security and Peace Studies focusing on how environmental issues correlate with modern security theories and policies, the concept is rapidly merging environmental and security sectors. Former Greek Naval Officer in the Hellenic Navy and current environmental security scholar Dimitrios Kantemnidis’ expertise sits at the center of the two merging fields. His military background informs perspectives on growing environmental security risks and potential responses for civilian and military actors.