Renato Catallini — President of Brazil at Tenaris

Mr. Renato Catallini serves as Purchasing Manager of Siderca S.A.I.C. Mr. Catallini has been a President of Braxil at Tenaris S.A. since October 2012. He served as the Supply Chain Director at Tenaris S.A. since August 2007. He served as Procurement Director of Tenaris SA since July 2002. He served as General Manager of Exiros Argentina in the supply management area in Tenaris in late 2001. He served as an Operations Director of Exiros since July 2002 and served as its Managing Director since January 2005. Mr. Catallini worked for ten years in the energy sector, worked at TGN, Nova Gas Internacional, TransCanada Pipelines and TotalFinaElf.