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Olav Hasaas


CMS Kluge Advokatfirma AS
Bryggegata 6
NO-0250 Oslo
PO Box 1548 Vika
NO-0117 Oslo
Languages Norwegian, English

Olav Hasaas is head of CMS Kluge's department of Energy, Industry and Climate.

Hasaas is mainly working within energy sector, including oil and gas, oil services and renewable energy. He has more than 15 years’ experience from the Norwegian and international petroleum industry and has broad competence within energy law, energy related contracts and corporate/M&A. Hasaas is regularly advising large international companies in connection with acquisitions of energy related assets in Norway.

Hasaas has also experience from several large construction projects within the energy and infrastructure sector and regularly advices major oil companies and companies within the oil service industry.

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Relevant experience

  • 2011 - Partner, CMS Kluge Advokatfirma AS (prev. Kluge Advokatfirma AS)
  • 2009 - 2010 Senior lawyer, Wiersholm
  • 2006 - 2009 General Counsel, Aker Solutions
  • 2005 - 2006 Vice President, Norsk Hydro, Legal Department
  • 1998 - 2005 Legal Counsel, Norsk Hydro
  • 2000 - 2001 Legal Counsel, Norsk Hydro Americas
  • 1996 - 1997 Associate lawyer, Oslo Municipality Lawyer’s office
  • 1994 Research assistant at the Department of Petroleum Law, University of Oslo
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Memberships & Roles

  • 2014 - Member of the board Enova SF
  • 2005 - 2009 Member of NHO's Legal Main Committee
  • 2006 - 2008 Member of the government-appointed Ecocrime Committee
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Awards & Rankings

Olav Hasaas was recommended as one of Norway's leading lawyers in the oil and gas sector by Finansavisen in 2020 and 2021.

Hasaas is recognized by Legal 500 within Oil and gas, and has been recommended by Chambers Global for several years.

“Olav Hasaas is noted by the market for his expertise in transactions in the oil and gas sector, and he also specialises in offshore construction matters. One client advises: "He's a great lawyer to have in discussions; he has great knowledge of the business side of things,” and praises Hasaas's ability to prioritise the key issues: "He knows where to pick up the pressure; he doesn't waste time turning every stone over.” His recent work includes assisting 4Subsea with various issues relating to its oil service supplier contracts.”
Chambers Global, 2019

Olav Hasaas holds noteworthy experience in offshore construction projects, with one client remarking: ‘He is one of the go-to people when you have development contract matters.’ He also handles joint operation agreements and licence contracts, as well as being active in the M&A sphere.
Chambers Global, 2018

emea recommended lawyer 2022


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  • Forkjøpsrett til andeler i utvinningstillatelser, Marius nr. 222 (1996).
  • Lojalitetsplikt i norske og internasjonale kontraktsforhold, inntatt i Industribygging og rettsutvikling. Juridisk festskrift i anledning Hydros 100-årsjubileum (2005)
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  • 1998 Master of Laws, Columbia Law School, New York
  • 1995 Cand. jur., University of Oslo
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