Life and careerEdit
Mustajärvi was born in Savukoski, Lapland. He graduated as ylioppilas in 1982, forestry engineer in 1988 and Master of Social Sciences in 1993, the last degree being from the University of Jyväskylä. He was member of the City Council of Kemijärvi until 2012 when he switched to Municipal Council of Savukoski.
On 30 June 2011 Mustajärvi and fellow MP Jyrki Yrttiaho were expelled from the parliamentary group of the Left Alliance because they had voted for a motion of no confidence against the Katainen Cabinet in which the Left Alliance was represented. Mustajärvi and Yrttiaho founded a new opposition parliamentary group called the Left Faction in September 2011. After the 2015 election Mustajärvi was allowed to return to the Left Alliance parliamentary group.
- Markus Mustajärvi Parliament of Finland. Retrieved 13 July 2017.
- "Yrttiaho ja Mustajärvi erotettiin vasemmistoryhmästä". Yle News. Yle. Retrieved 13 July 2017.