 From September 2008 he is professor emeritus at the Aristotle University.At the 2009 European election, Tsoukalas was elected to the European Parliament for the New Democracy (EPP group).He is a member of the Committee on Industry, Research and Energy, the Delegation to the EU-Armenia, EU-Azerbaijan and EU-Georgia Parliamentary Cooperation Committees, the Delegation to the Euronest Parliamentary Assembly and a substitute member of the Committee on Fisheries, the Committee on Petitions and the Delegation to the ACP-EU Joint Parliamentary Assembly.