After working in the Combat information center of Destroyers in the Maritime Self-Defence Force, he worked in the Air Self-Defence Force in charge of security for the air defence command system. Then, after working at JPCERT/CC, etc., he joined Nihon Cyber Defence in December 2018. He provides advisory services for CSIRT establishment and cyber exercises by utilizing his experience and achievements in incident handling, his area of expertise. Recently, he is strengthening his activities related to cyber intelligence and active defense.