Parkhomenko is known as an author or participant of various civic initiatives. In 1994 he was one of the founders of the Moscow Journalists' Charter. In 2004 he became a member of
Committee 2008 which tried to find a "democratic alternative" facing the upcoming presidential elections of 2008. Parkhomenko is also the author of the idea and the name of the public movement "
Society of Blue Buckets" that fights against the privileged position of road vehicles with flashing lights (except for firefighters, police and ambulance); Parkhomenko was an organizer of the society's first public events in spring 2010. During
Russian protests in 2011–2013, Parkhomenko was one of the leading figures of the movement. In the fall of 2012 he was elected a member of the
Russian Opposition Coordination Council. Parkhomenko was instrumental in organizing mass rallies in Moscow in Winter 2011 – Spring 2012. In the spring of 2012, he co-founded the League of Voters and initiated mass lawsuits against government election fraud. This activity resulted in March 2013 in
Constitutional Court of Russia hearing where the Court ruled that Russian voters should be allowed to appeal election results directly. Since 2013, Parkhomenko is one of the founders (along with
Andrey Rostovtsev,
Andrey Zayakin and
Mikhail Gelfand) and an active popularizer of a voluntary networking community
Dissernet whose activity aimed at purification of the Russian science from plagiarism, especially among Doctoral and post-Doctoral dissertations in Russia. Parkhomenko is also one of the initiators of the project
Last Address that started in 2014. This project (based on the similar European project
Stolperstein) implies installing a small (about the size of a palm) memorial plaque on the wall of the last house of a person subjected to political persecution in the Soviet years. In 2014 Parkhomenko was a member of the Congress "Ukraine – Russia: A Dialogue", held in
Kyiv. In May 2014 S. Parkhomenko was elected a member of the Russian PEN Center, the Russian branch of the
PEN International. In January 2017 he was expelled from the group for "provocative activity"; Parkhomenko claimed he was expelled for criticizing the Russian PEN Center for failing to support imprisoned (in Russia) Ukrainian filmmaker
Oleg Sentsov. In 2016, Parkhomenko became a co-founder and jury member of the independent award in the field of professional journalism
Redkollegia (in Russian translates to "Editorial Board"), established by the charitable foundation "
Sreda Foundation" to support free professional journalism in Russia. In the interview to The Fix given in April 2025, Parkhomenko explained how the award was functioning during wartime, in spite of new challenges. == Awards ==