Wärtsilä's Corporate Manual gives a brief description of the Wärtsilä way of working and contains the core policies, guidelines and instructions that are applicable to the entire Wärtsilä Group. These policies complement the Code of Conduct which sets out, among other things, the requirement to maintain the highest legal and ethical standards in the Wärtsilä business practices.
Wärtsilä participates in the Sustainable Shipping Initiative and the UN Global Compact initiative. In 2014, Wärtsilä signed the Diversity Charter of the Finnish Corporate Responsibility Network FIBS. Wärtsilä has also signed an agreement in 2008, whereby the Finnish industry voluntarily endeavours to use energy more efficiently. Wärtsilä North America Inc. has joined the Customs Trade Partnership Against Terrorism (C-TPAT) agreement signed in 2003.