He has a master's degree in Industrial Engineering from the Polytechnic University of Catalonia and he passed the public examinations and entered into the Superior Corps of State Functionaries.
He also sponsors the Escuela Superior de Música Reina Sofía and is a member of the Board of Protectores del Teatro Real and of its Monitoring Committee.
Antonio Llardén brought forward a 4,000 million euros investment plan that was set to be realised between 2007-2012, in order to increase the gas pipeline network and expand the plants in Barcelona, Huelva and Cartagena.
[2] In this context, he was a member of Policy Advisory Network of International Chamber of Commerce (ICC) and was part of its Commission on Environment and Energy.
Llardén was the Dean of the College of Engineers, as well as a member of the Social Council of the Autonomous University of Barcelona and Chairman of its Economics Committee.