Her career in journalism started in the late 1980s, when only at the age of 17 and still a student in high school she became a co-host of a famous Finnish television personality Timo T. A. Mikkonen in his daily magazine-type program.

[citation needed] On the radio she could be heard leading a daily talk show discussing current issues with politicians and experts and in addition cohosting a programme with a man about the pitfalls of relationships for couples.

[citation needed] Guzenina wrote a humorous book on the subject with Seppo Pietikäinen, titled Parisuhteen käsikirja ('A manual for relationships') and published in 2005.

[citation needed] Guzenina's later career has involved politics within the ranks of the Social Democratic Party of Finland.

In addition to her role in parliament, Guzenina has been serving as a member of the Finnish delegation to the Parliamentary Assembly of the Council of Europe since 2013.

[7] Her third marriage to British musician Mark Richardson, the drummer of Skunk Anansie fame, ended in 2001 due to the spouse's alleged infidelity.

In the spring of 2013, Russia accused Finland of mistreating Russian-origin families in the child welfare services.