[1] Vitsas then joined Synaspismos, where he was secretary of the Central Political Committee from 2009 to 2013.

In July 2013, when SYRIZA was formed as a single party, he was elected secretary of the Central Committee.

[3] On 18 July 2015, he became Deputy Minister of National Defence following the resignation of Kostas Isichos.

On 28 February 2018, he became Minister of Immigration Policy,[4] a position he held until 9 July 2019.

[5] In the resulting Parliament, he was elected as the 4th Vice President, a position he held until 2023.