Siumar formerly worked as an anchor for Hromadske Radio, as a freelance journalist for Voice of America in Ukraine, and as a lecturer at the Taras Shevchenko National University Institute of Journalism.

[2] From March to June 2014, she served as the Deputy Secretary of the National Security and Defence Council.

[1] Since December 2014, she has been heading the Committee on Freedom of Speech and Information Policy.

[6] In the July 2019 Ukrainian parliamentary election Siumar was placed sixteenth of the party list of European Solidarity.

[8] The information referred to in the declaration of assets, revenues, expenditures and financial liabilities is shown on the official website of the Verkhovna Rada of Ukraine : http://gapp.rada.gov.ua/declview/home/preview/17948 Archived 2015-07-15 at the Wayback Machine