Grzegorz Marek Poznański (born 9 March 1971, Warsaw) is a Polish career diplomat and civil service member, ambassador to Estonia (2010–2014), Director General of the Permanent Secretariat of the Council of the Baltic Sea States (CBSS) in Stockholm (2020–2024).

Grzegorz Marek Poznański received a master's degree of international relations at the University of Warsaw.

[1] He started his diplomatic career in 1997 at the Ministry of Foreign Affairs (MFA), specializing in security, disarmament, non-proliferation and arms export control issues.

[4] In June 2020 he Grzegorz Marek Poznański was appointed Director General of the Council of the Baltic Sea States Secretariat as of 1 September 2020.

[1] Besides diplomatic career, Poznański is also a fencer (épée, foil), member of Legia Warsaw sport club.