Martin Biesel (born 1962) began his political career as an advisor to the Federal Chairman of the FDP, Otto Graf Lambsdorff, in 1990. He then held senior positions at the FDP party headquarters until 1999.

Martin Biesel was Guido Westerwelle's long-standing political aide, serving as his office manager since 1994.

Martin Biesel was appointed State Secretary in the Foreign Office in 2009 and in this role also coordinated the FDP's coalition work under Vice-Chancellor Guido Westerwelle. After leaving political office in 2011, Martin Biesel returned to the field of public affairs as authorised representative of the board at Air Berlin. Prior to that, he worked in public affairs at EADS (Airbus) from 1999 to 2001.

In January 2017, Martin Biesel founded his own political consultancy. He is currently also Secretary General of the Westerwelle Foundation.

Martin Biesel holds a Master's degree in Political Science from the University of Bonn.