Originally, the name came from Wärtsilä, a city in eastern Finland where the company was founded in 1834.
Today, it stands for “The passionate and creative partner who gets things done".
| 1975 | License agreement for 2-stroke engine with Hyundai Heavy Ind. |
| 1984 | License agreement for 2-stroke engine with Korea Heavy Ind. |
| 1986 | - License agreement for 4-stroke with SsangYong Heavy Ind. - Establishment of Wärtsilä Korea Liaison office |
| 1993 | Establishment of Wärtsilä Korea Ltd. |
| 1995 | Termination of the License agreement with SSangYong |
| 1997 | Establishment of Wärtsilä NSD Korea Ltd. through merger with New Sulzer Diesel Ltd. |
| 2000 | Renamed into Wärtsilä Korea Ltd. |
| 2004 | Establishment of CISERV Korea Ltd. |
| 2006 | Wärtsilä Korea merged CISERV Korea |
| 2007 | Opening of Training Centre (Wärtsilä Land & Sea Academy) |
| 2008 | Move into Eomgung Premises for "All under one roof" Wärtsilä-Hyundai Engine Company (JV 50%/50%) inaugurated |
| 2013.1 | Training Centre joined Wärtsilä Korea Eomgung Premises |
| 2014.1 | Wärtsilä Korea merged Wärtsilä Hamworthy Korea |
| 2015.1 | Transfer Wärtsilä 2S business into JV Winterthur Gas & Diesel(WinGD) Korea Ltd. (Wärtsilä vs CSSC : 30% vs 70%) |
| 2016.6 | Divestment of Wärtsilä's 30% shares in 2S business JV WinGD of CSSC. |
| 2018.4 | Wärtsilä Korea merged with Wärtsilä Marine Systems Korea |
| 2018.9 | Opening Wärtsilä Korea Seoul office |
| 2020.3 | Relocation of Wärtsilä Korea Head office to Jung-Gu, Busan |
| 2020.11 | Closure of Wärtsilä-Hyundai Engine Company |