Before entering politics, he was a well-known business manager and civil environmental campaigner in South Korea.

[1] Moon began his career at Yuhan-Kimberly [ko], a company manufacturing paper and woven fibre products.

On his return, he developed the concept of "environmental management", focusing on digital printing technologies and the use of recycled paper.

In October, he formed the Creative Korea Party, with an anti-corruption, pro-environmentalist program, gaining a bit of support from liberal voters who supported the Participatory Government, conservative voters who wanted to change the government and liked a similar 'business leader' portfolio but disliked Lee Myung-bak, and from the labor movement.

However, he lost his seat after a year (2009.10.22) due to his party members gaining profit illegally by confidential information.