Ekamai International School Model United Nations (EISMUN) Club was founded by Ms. SooYeon Jang in 2011. The club began with the support of Ruamrudee International School (RIS) which performed a small workshop for its club members. After Ms. Jang's graduation, Mr. Suhail Prasathong became her successor. During his term, the EISMUN club members had their first conference at RIS, which led to the club's constant and active participation in conferences both inside and outside Thailand ever since. 

Even during the COVID-19 Pandemic, the EISMUN Club hosted a few online conferences and resumed on-site conferences in April 2022. In 2025, as Ms. Serin Cig serves her presidential term, EISMUN has become a platform where young leaders from different schools come together to engage in meaningful debates and tackle critical issues facing our world today. We are proud to offer an inclusive and supportive environment where delegates of all experience levels can thrive.