35, after which he switched to the Ion Luca Caragiale High School, where he attended a special math class[2] from 1968 to 1971.

During Nicolae Ceaușescu's communist regime, Dăianu worked for the Securitate's Foreign Intelligence Unit (DIE),[3] between 1976 and September 1978.

He left DIE in 1978, of his own volition and he became known, in the following decade, for his writings against Ceaușescu's economic policy, which were highlighted on Radio Free Europe (RFE) at the time.

In September 2007, the National Council for Analyzing the State Security Department Files (CNSAS) decided that Dăianu had worked for the External Intelligence Unit solely on economic issues.

In August 2005, he became President of the Supervision Board of Banca Comercială Română, a position previously held by Sebastian Vlădescu and Florin Georgescu [ro], among others.

He resigned this post in December 2007, in order to avoid any conflict of interest with his duties as a member of the European Parliament.

Daniel Dăianu is a member of the High Level Group on Own Resources of the European Union, which is headed by Mario Monti.