Former Ukrainian Ambassador to Japan, Dr. Sergiy Korsunsky, Appointed Senior Advisor to Nihon Cyber Defence

Nihon Cyber Defence (NCD) (Head Office: Chiyoda-ku, Tokyo, CEO: Cartan McLaughlin), a company pioneering sovereign cyber technology in Japan, today announced the appointment of Ambassador Dr. Sergiy Korsunsky—former Ukrainian Ambassador to Japan—as Senior Advisor. Dr. Korsunsky brings decades of leadership in diplomacy, national strategy, and economic security, with a distinguished record of service in Japan, the United States, and Turkey.

Purpose of Appointment

As geopolitical tensions reshape the global threat landscape, Dr. Korsunsky’s appointment enhances NCD’s ability to support policy-aligned cyber defence initiatives in Japan and abroad. He will advise on international strategy, public-private cooperation, and global partnerships at the intersection of diplomacy, national resilience, and cyber security.

“It is an honour to join NCD at a time when cyber threats have become a defining challenge for governments and societies. I look forward to contributing to NCD’s mission to defend national infrastructure and economic stability through informed, proactive engagement. It is crucial to develop security cooperation between Japan and Ukraine, and other partners to defend peace and freedom.”

— Dr. Sergiy Korsunsky

“Ambassador Korsunsky’s experience navigating diplomacy, security, and economic policy at the highest levels is unmatched. His insights will help guide NCD’s role in supporting Japan’s cyber sovereignty and reinforce our commitment to trusted, globally informed defence solutions.”

— Cartan McLaughlin, Founder & CEO

Dr. Sergiy Korsunsky

Dr. Korsunsky served as Ambassador of Ukraine to Japan from 2020 to 2025, following prior postings as Ambassador to Turkey, Director of the Diplomatic Academy of Ukraine, Minister-Counselor and Acting Ambassador to the United States, and Director-General of the Economic Department at Ukraine’s Ministry of Foreign Affairs. He holds the rank of Ambassador Extraordinary and Plenipotentiary and Doctor of Sciences degree in applied mathematics.

A recognised expert on security, trade, energy, and international affairs, Dr. Korsunsky was awarded by the President of Ukraine in 2008 for his contribution to economic development, and by the Ukrainian Parliament in 2024 for his lifetime achievements.

Looking Ahead

Dr. Korsunsky’s appointment reflects NCD’s commitment to engaging globally experienced leadership to navigate the evolving cyber threat landscape. His strategic counsel will further strengthen NCD’s ability to serve government and industry with insight-driven, policy-aligned cyber defence.