Hautala currently continues to work closely with EU affairs as a member of the Grand Committee. In addition, she has chaired the Green parliamentary group and currently she is the Chair of the Legal Affairs Committee in the Finnish Parliament. Also she is a member of the Parliament's Speaker's Council. As well Hautala is Chairperson of the National Equality Commission (TANE). She advocates environmental responsibility, openness in politics, and global justice.
Heidi Hautala is engaged to work also in organizations on the side of her work in Finnish Parliament. She is former President of Service Centre for Development Cooperation and current Member of the executive bureau of Crisis Management Initiative (CMI) which President is Martti Ahtisaari former President of Finland (1994–2000) and a United Nations diplomat and mediator, noted for his international peace work.
In 2001, Hautala successfully took the Council of the European Union to the European Court of Justice over access to a document on arms export rules. The Court ruled that the ministers should have considered publishing at least part of the document. The so-called "Hautala case" set a precedent in European law for access to documents.