He took the silver medal at the 2000 Asian Championships but was defeated by his teammate Taufik Hidayat in the final.

[3] In 2001, he reached the final of the 2001 Malaysia Open as an unseeded player, defeating a former All England champion Pullela Gopichand of India, his compatriot Hendrawan, the world champion, Park Tae-sang of South Korea, and Chen Hong of China en route to the final.

He failed to win the title after he lost to host player Ong Ewe Hock.

[4] Agustinus played at the 2002 Busan Asian Games, and helped the team win the silver medal.

[7][8] Currently he is a coach for South Korea national men's and women's single team.