Wärtsilä signed the United Nations Global Compact initiative in 2009 and supports its ten principles with respect to human rights, labour, the environment, and anti-corruption. Wärtsilä is committed to aligning its strategy, culture, and day-to-day operations with the principles, and to engage in collaborative projects that advance sustainable development. Wärtsilä's Code of Conduct and sustainability programmes are the practical tools used for promoting the principles within its sphere of influence.
In 2011, Wärtsilä joined the Sustainable Shipping Initiative (SSI) and signed its Vision for a Sustainable Shipping Industry in 2040. The initiative brings together some of the biggest companies in the maritime sector.
Wärtsilä also participates in the Sustainable Marine Biofuel Initiative, the purpose of which is to accelerate the development of reliable combustion engines capable of running on sustainable, scalable, and affordable marine bio-fuels.
Wärtsilä has signed the Finnish Business and Society's (FIBS) Diversity Charter, and has also signed an agreement in 2016, whereby Finnish industry voluntarily endeavours to use energy more efficiently. Wärtsilä North America Inc. signed the Customs Trade Partnership Against Terrorism (C-TPAT) agreement in 2003.