Janusz Adam Onyszkiewicz is a Polish mathematician and politician. From January 2007 until mid-2009, he served as the Vice-President of the Foreign Affairs Committee in the European Parliament.
Mr Onyszkiewicz was elected as a Member of Parliament from 1989 until 2001. From 1992 until 1993, he was promoted to Minister of Defence under Prime Minister Hanna Suchocka, and again from 1997 until 2000 under Prime Minister Jerzy Buzek.
From 2004 until 2009, he served as a Member of the European Parliament and was elected as a Vice-President of the Parliament, a post he held from 2004 until 2007.
Mr Onyszkiewicz is Chairman of the International Centre for Democratic Transition's (ICDT) International Board of Directors. He is a member of the administration of the Centre for International Relations, Vice-Chairman of the Asia-Pacific Council and the Chairman of the Council of the Institute for 'Bridges to the East' . He is the Chairman of the Polish Alpinism Association and from 2004 has served as the Chairman of the Euro-Atlantic Association Council.
He is also a member of the Executive Board for the European Leadership Network (ELN).