Mr. Shimada is a globally known negotiation strategist and professional mediator, moderator, and facilitator. He serves as CEO of KS International Strategies, Inc., a consulting and advisory firm for public and private sectors on global affairs, including environment and energy issues. He also serves as special adviser to the Minister of Environment and is a lead negotiator on climate change.

Prior to these, he served as principal international policy coordinator and negotiator at the Ministry of the Environment and contributed to establish negotiation strategies for climate change and biodiversity negotiations. This included a role as executive assistant to the President of COP10 (biodiversity) in Nagoya.

Before joining the Japanese government, Mr. Shimada was a lead mediator for peace and security at the UN and mediated several cases, including Kosovo, Afghanistan, and Iraq. Currently, he appears on CNN, BBC, and France 2 as a commentator on global affairs, as well as a professional trainer on negotiation skills and public speaking at various schools and firms.