Born in 1950 in Tudela, Navarre, he obtained a degree in Road, Channel and Port Engineering and became a civil servant.

[2] He served as Secretary of State of Public Administration during the González Governments between 1986 and 1991, when he replaced Joaquín Leguina as Secretary-General of the Madrilenian Socialist Federation (FSM).

[6] He ran 2nd in the PSOE list for the 1991 Madrilenian regional election,[7] and became a member of the 3rd term of the Assembly of Madrid.

[2][1] Counselor of Labor and Immigration in the Spanish Embassy to the United Kingdom, Serrano was appointed by the Council of Ministers as President of Renfe in May 2009.

[1] He left the post in late 2011 with the change of government, as Mariano Rajoy became prime minister.