Dainius Žalimas was born on 22 May 1973 in Vilnius. In 1996, he graduated from the Faculty of Law of Vilnius University. Since 1996 he has been a lecturer at Vilnius University, in 2002–2005 he was a lecturer at the Law University of Lithuania (at present Mykolas Romeris University), and in 2001– 2003—at the Military Academy of Lithuania. In 2001, he defended his PhD thesis at Vilnius University. From 1998 until 2011, he was a legal adviser to the Minister of National Defence. In 2005–2011, he was a member of the Permanent Court of Arbitration. Since 2011, he has been a professor of international and EU law at the Faculty of Law of Vilnius University. He is an author of several books as well as of numerous articles dealing with the issues of public international law and constitutional law. On an individual basis as well as while taking part in various working groups, he was engaged in preparation of a number of draft laws of the Republic of Lithuania. He is a professor, holds a PhD in law. In March 2011, Mr Dainius Žalimas was appointed a justice of the Constitutional Court. In the period July 2014- May 2021, he has been President of the Constitutional Court of the Republic of Lithuania.

Currently, he is a professor of the Mykolas Romeris University and the head of a newly established public non-profit organizations “Law and Democracy Center” (initially - Justice Hub for Belarus).