He was successively appointed to managing the Districts of Sant Andreu, Les Corts and Gràcia at Barcelona City Council. Jordi Hereu became City Councillor for Security and Transportation in 2003. On 30 August 2006 Hereu was designated as the future Mayor of Barcelona, replacing Joan Clos after the latter was appointed as the Minister for Industry.
Jordi Hereu held various positions at Barcelona City Council, including managing the Districts of Sant Andreu, Les Corts, and Gràcia. He became a City Councillor for Security and Transportation in 2003. In 2006, he was designated as the future Mayor of Barcelona to replace Joan Clos after Clos's appointment as Minister for Industry.