[1] In Chang-soo played for E-Land Puma during 1994 and 1995.
[2] In 2006, he started his coaching career in Ansan Hallelujah.
On 5 December 2017, he was appointed as manager of Seoul E-Land.
[3] In 2019, In was appointed as assistant manager of South Korea under-20 team.
With them, he was the runner-up at the 2019 FIFA U-20 World Cup.