DG JUST (Brussels)

Katja Viertiö

DG JUST (Brussels)
Deputy Head of Unit

Katja Viertiö joined the Commission in 1994. She first worked in the industrial policy department of the Directorate-General ("DG") for Industry and then in the Commission’s external relations services where she was mainly dealing with Poland’s accession to the EU. From 1999 to 2000 she worked in the Cabinet of Mr Liikanen, Commissioner for Enterprise and the Information Society. In 2000 she moved to the Information Society DG where she spent four years working on the liberalisation of the EU telecommunications market. She then joined the Competition DG in 2004 and first worked as a case handler in the area of electronic communications (antitrust and ex ante regulation) and from 2008, in the policy and case scrutiny unit. In the latter, her main tasks have included the preparation of the December 2008 Guidance on the Commission’s enforcement priorities in applying Article 82 to abusive exclusionary conduct by dominant undertakings and the 2010 "verticals package" consisting in a revised Block Exemption Regulation and Guidelines on vertical restraints. She is currently working for DG Justice as Deputy Head of Unit in the field of Consumer strategy, Representation and International relations.

Auteurs associés

DG EMPL (Brussels)
DG COMP (Brussels)
European Commission (Brussels)
DG COMP (Brussels)
DG TRADE (Brussels)


2938 Bulletin

Katja Viertiö, Lucas Peeperkorn The EU Commission issues guidance on its enforcement priorities in applying EU rules on abuse of a dominant position to abusive exclusionary conduct by dominant undertakings


"Implementing an effects-based approach to Article 82"* I. Introduction On 3 December 2008, the Commission issued Guidance on its enforcement priorities in applying Article 82 to abusive exclusionary conduct by dominant undertakings. In so doing, the Commission formally endorsed an (...)

Iratxe Gurpegui Ballesteros, Katja Viertiö The EU Commission adopts a decision against Spanish incumbent telecoms operator for abuse of its dominant position in the broadband market (Telefónica)


"Margin squeeze in the Spanish broadband market : a rational and profitable strategy"* On 4 July 2007, the European Commission adopted a decision against the Spanish incumbent telecoms operator Telefonica for a very serious abuse of its dominant position in the Spanish broadband market. The (...)

2756 Revue

Didier Ferrier, Katja Viertiö Colloque - Réforme des restrictions verticales : Les enjeux de l’entrée en vigueur du nouveau règlement - Présentation (Paris, 27 mai 2010)


Le règlement d’exemption par catégorie n° 330-2010 et ses lignes directrices constitueraient selon la Commission européenne une simple évolution par rapport au règlement n° 2790-1999. Ils pourraient cependant profondément modifier non seulement le traitement des accords verticaux en raison notamment de (...)

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