Senior Management

Chairman and Chief Executive Officer Mr. Rocca is the chairman of the Company's board of directors and our chief executive officer. He is a grandson of Agostino Rocca. He is also chairman of the board of directors of Tamsa. He is also the chairman of the board of directors of Ternium, a director and vice president of San Faustin, and a director of Techint Financial Corporation N.V. Mr. Rocca is vice chairman of the World Steel Association and a member of the International Advisory Committee of the NYSE Euronext (New York Stock Exchange). Mr. Rocca is an Italian citizen.

Mr Soler currently serves as our chief financial officer, a position that he assumed in October 2007. Previously he served as chief executive officer of Hydril and from 1999 until November 2006 served as managing director of our welded pipe operations in South America and as executive vice-president of Confab and Siat. He started his career in the Techint group in 1973 as a planning analyst at Siderar. He served as Siderca's financial director from 1993 until 1995. Mr. Soler is an Argentine citizen.

Mr. Catallini currently serves as our supply chain director, with responsibility for the execution of all contractual deliveries to customers. He joined Tenaris in 2001 in the supply management area, as a general manager of Exiros Argentina. In July 2002, he was appointed operations director and subsequently, in January 2005, became managing director of Exiros. Before joining Tenaris, he worked for ten years in the energy sector, working for TGN, Nova Gas Internacional, TransCanada Pipelines and TotalFinaElf, among others. He assumed his current position in August 2007. Mr. Catallini is an Argentine citizen.

Mr. Moreno currently serves as our planning director. Previously, he served as director of Oilfield Services business unit. He first joined Siderca in 1987 after graduating as an industrial engineer. Up to 1993 he worked in several finance and marketing positions in Siderca and was also responsible for sales in Latin America. In 1996 he became Tamsa's exports sales director and in 1999 he became the director of the Pipeline Services business unit. He assumed his current position in May 2010. Mr. Moreno is an Argentine citizen.

Mr. Pappier currently serves as our chief information officer. Previously, he served as planning director. He began his career within the Techint group in 1984 as a cost analyst in Siderar. After holding several positions within Tenaris and other Techint group companies in 2002, he became chief of staff of Tenaris. He assumed his current position in May 2010. Mr. Pappier is an Argentine citizen.

Mr. Radnic currently serves as our human resources director. He began his career within the Techint group in the Industrial Engineering Department of Siderar in 1975. Later he held several positions in the technical departments of Siderca and various companies within the Techint group. After holding several positions in the marketing and procurement areas in Europe, in 1996 he became commercial director of Dalmine. In 1998, he became the director of our Process and Power Services business unit. In 2001, he was appointed chief of staff for Paolo Rocca in Buenos Aires. He assumed his current position in December 2002. Mr. Radnic is an Argentine citizen.

Mr. Ramos currently serves as our technology director, with responsibility over technology and quality. Previously he served as quality director and managing director of NKKTubes and our Japanese operations. He joined the Techint group in 1987 and has held various positions within Tenaris including quality control director at Siderca. He assumed his current position in April 2010, when the quality and technology departments were combined. Mr. Ramos is an Argentine citizen.

Mr. Crapanzano currently serves as our industrial director, a position he assumed in April 2011. Previously he served as our European area manager, Mexican area manager and executive vice president of Tamsa. Prior to joining Tenaris, he held various positions at Grupo Falck from 1979 to 1989. When Dalmine acquired the tubular assets of Grupo Falck in 1990, he was appointed managing director of the cold drawn tubes division. He is also vice president of Centro Sviluppo Materiali S.p.A, and of Federacciai. Mr. Crapanzano is an Italian citizen.

Mr. Curá currently serves as our North American area manager. He is a marine engineer and was first employed with Siderca in 1988. Previously, he served as Siderca's exports director, Tamsa's exports director and commercial director, sales and marketing manager of our Middle East office, president of Algoma Tubes, director of our Oilfield Services business unit and commercial director. He is also a member of the board of directors of the American Petroleum Institute (API). He assumed his current position in October 2006. Mr. Curá is an Argentine citizen.

Mr. de la Maza currently serves as our Central American area manager and also serves as a director and executive vice-president of Tamsa. Previously he served as our Mexican area manager. He first joined Tamsa in 1980. From 1983 to 1988, Mr. de la Maza worked in several positions in Tamsa and Dalmine. He then became manager of Tamsa's new pipe factory and later served as manufacturing manager and quality director of Tamsa. Subsequently, he was named manufacturing director of Siderca. He assumed his current position in 2006. Mr. de la Maza is a Mexican citizen.

Mr. Martínez Alvarez currently serves as our Southern Cone area manager, a position he assumed in June 2010, having previously served as our Andean area manager. He began his career in the Techint group in 1990, holding several positions including planning manager of Siderar and commercial director of Ternium-Sidor. In 2006, he joined Tenaris as our Venezuela area manager. Mr Martínez Alvarez is an Argentine citizen

Mr. Lammertyn currently serves as our Eastern Hemisphere Area Manager based in Dubai. He assumed his current position in August 2010, after a restructuring of the commercial department aimed at strengthening our regional presence in the eastern hemisphere. Mr. Lammertyn began his career with Tenaris in 1990. Previously he served as assistant to the CEO for marketing, organizational model and mill allocation matters, supply chain director and commercial director. Mr. Lammertyn is an Argentine citizen.

Mr. Zanotti currently serves as our European area manager, a position he assumed in April 2011. He joined Tenaris in 2002 as planning and administration director in Exiros, the supply management area. He was later appointed raw materials director and in July 2007 became managing director of Exiros, a position he held until June 2010. In July 2010 he became the senior assistant to the European area manager. Before joining Tenaris, he was a senior manager at A.T. Kearney in Milan, where he worked from 1998 to 2002, and prior to that he held various business development positions in the Far East for Lovato Electric. Mr. Zanotti is an Italian citizen

Mr. Noriega currently serves as advisor to the chief executive officer, supervising our Brazilian operations. Until June 1, 2010, when he assumed his current position, he served as our South American area manager and as managing director of Siderca. Previously, he served as Siderca's commercial director for the Argentine market. He began his career at Siderca as an industrial engineer in 1981. Mr. Noriega is an Argentine citizen.