Brigade general Mindaugas Steponavičius (Lithuanian: [/mɪnˈdɑʊɡɐs ˈstɛpɔːnɑːvɪtʃʊs/]; born 12 August 1974) is a Lithuanian military officer who has been serving as the Chief of the Defence Staff of Lithuania since 25 September 2020.

[1] In 1999, he graduated from the General Jonas Žemaitis Lithuanian Military Academy, and later attended the Baltic Defence College in Tartu, followed by the United States Army War College in Carlisle, Pennsylvania.

From 2014 to 2016, he served in the Capability Planning Department of the Ministry of National Defence.

Between 2016 and 2019, he was the commander of the Mechanised Infantry Brigade Iron Wolf, and from 2019 to 2020, he led the Training and Doctrine Directorate of the Lithuanian Armed Forces.

Since 2024, he has been serving at the Permanent Representation of the Republic of Lithuania to NATO and the European Union.