Rynkevich is a member and the press secretary of the Belarus Helsinki Commission since 1996 and Vice Chairman of the Social Democratic Party of Popular Accord.
[1] Rynkevich is best known for his role as lead defence counsel for Alaksandar Kazulin,[2] former Chairman of BSDP and one of the most prominent Eastern-European human rights activist, and for advocating the release of American lawyer Emanuel Zeltser and his assistant Vladlena Funk during the U.S. - Belarus hostage crisis in 2008-2009.
Yielding to intense international pressure, Belarusian dictator Lukashenka granted Kozulin presidential pardon in August 2008.
[10] In 1995 Rynkevich co-founded Belarusian Social Democratic Union and engineered the amalgamation of the BSDP with the Party of the People’s Consent (PPC).
In 2001-2004 he worked closely with the Belarusian Citizens’ Legal Defence Centre, a prominent human rights organization.
[citation needed] In 2016 he attended the Russian Bolotnaya Square case as an independent observer and consulted the defence.