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Senior Management

  • Ross Deutscher

    Ross Deutscher

    Country Manager - Kurdistan Region of Iraq

    Ross joined Gulf Keystone as Country Manager in January 2019. 

    Prior to his GKPI assignment he successfully served over eight years in the Kurdistan Region of Iraq in senior leadership roles with Talisman Energy and Repsol, most recently as director accountable for the safe development of all operations and strategic leadership.

    Ross has over 35 years’ experience in the exploration for new oil and gas fields, as well as the development of producing fields, in the Kurdistan Region of Iraq, western Canada and USA, Venezuela, Colombia, Peru, UK and Dutch North Sea, Algeria and Spain. 

    Prior to Talisman and Repsol, Ross acquired oil and gas experience at Suncor, Vista Energy, Wascana Energy and Saskoil. He holds a BSc in Geological Engineering (Geophysics Option) from the University of Saskatchewan in Canada.

  • Nadzeya Kernoha

    Nadzeya Kernoha

    Head of Finance

    Nadzeya joined Gulf Keystone in January 2012.

    She has more than ten years’ experience in audit and finance within the oil and gas sector and qualified as a Chartered Accountant at Deloitte London where she worked within the Energy and Resource Audit Practice. Nadzeya held several roles with Gulf Keystone’s finance team before assuming her current role as Head of Finance in January 2019.

    Nadzeya graduated with a bachelor’s degree in Business Administration and Economics from the American University in Bulgaria.

  • Mark Parsley

    Mark Parsley

    Subsurface Manager

    Mark joined Gulf Keystone as Subsurface Manager in June 2018.

    Mark has more than 20 years’ experience in various subsurface roles in ARCO, Hess and Tullow. Mark has performed roles as a Reservoir Engineer, Economist, Production Engineer, Production Planner, Subsurface Team Leader, Reserves Manager, and Subsurface Manager for assets in the North Sea, SE Asia, Algeria, Middle East, West Africa, and the USA.

    Mark graduated from Oxford University in Geology and has an MSc in Petroleum Engineering at Imperial College.

  • Alasdair Robinson

    Alasdair Robinson

    Legal Director and Company Secretary

    Alasdair joined Gulf Keystone as Legal Director and Company Secretary in June 2017.

    After qualifying as a solicitor, Alasdair worked in investment banking for over ten years, latterly as Head of Corporate Finance Execution at an independent investment bank. In 2007, he joined Melrose Resources as Corporate Finance Manager and Company Secretary, and upon its acquisition by Petroceltic International in 2012, was appointed General Counsel and Company Secretary of the enlarged group. Following Petroceltic’s acquisition, Alasdair worked for a fund management group as Head of Finance, Legal and Risk, and Company Secretary, before joining Gulf Keystone.

    Alasdair is a law graduate of Aberdeen University and has an MBA from Strathclyde Business School. He is a member of the London Stock Exchange Regional Advisory Group.


  • Maximiliano Tamola

    Maximiliano Tamola

    IT Manager

    Maximiliano joined Gulf Keystone as IT Manager in May 2019.

    He has over 16 years’ of experience in the oil and gas industry, starting his career at YPF (Argentina) and moving to Repsol operations internationally. He was also a secondee in Akakus Oil operations in Libya. Maximiliano has led international IT projects in a variety of environments such as desert operations, deep-water drilling, Siberian fields, and countries in remote or high-risk areas. Prior to his appointment at Gulf Keystone, he was the Regional EMEA & International IT Services Manager at Repsol. He also has expertise in cybersecurity and digital transformation.

    Maximiliano has an MBA in Management Information Systems from USAL and The State University of New York.


  • Jón Ferrier

    Jón Ferrier

    Chief Executive Officer

    Jón Ferrier joined Gulf Keystone in June 2015 as Chief Executive Officer following three decades spent in exploration, commercial, strategic and leadership positions in the oil and gas and mining industries. Before joining Gulf Keystone, he was Senior Vice President Business Development, Strategy & Commercial at Maersk Oil in Copenhagen. He holds an MSc from Imperial College. 

    Jón has considerable international experience gained across technical, commercial and a variety of managerial and leadership positions. His roles prior to joining Gulf Keystone had a strong external orientation and have seen him working effectively with all stakeholders, including host governments. 

    Prior to Maersk Oil, Jón’s industry experience was gained with Anglo American, ConocoPhillips, Paladin Resources plc and Petro‑Canada/Suncor, in a number of geographies.


  • Ian Weatherdon

    Ian Weatherdon

    Chief Financial Officer

    Ian Weatherdon joined Gulf Keystone in January 2020 as Chief Financial Officer.

    Ian has over 25 years' experience in the international oil and gas industry. Most recently he was CFO of Sino Gas & Energy Holdings, an energy company focused on developing natural gas assets in China that was an Australian listed Company (ASX:SEH) until acquired by a private equity firm.  Prior to this, he held various executive roles, including; Vice President of Finance & Planning for the Asia-Pacific region, and Vice President of Investor Relations for Talisman Energy Inc., the Canadian exploration and production company which was acquired by Repsol in 2015.  He also held the CFO role at Equión Energía Limited, a Colombian joint venture between Talisman Energy Inc. and Ecopetrol SA.

    Ian has a B. Comm from the University of Calgary and is a Canadian Chartered Accountant.

  • Stuart Catterall

    Stuart Catterall

    Chief Operating Officer

    Stuart joined Gulf Keystone as Chief Operating Officer in January 2017. 

    He has over 30 years’ experience in the oil and gas industry, undertaking a broad range of senior leadership and technical roles with Amerada Hess, BHP Billiton and Celtique Energy. Most recently and prior to joining Gulf Keystone, he worked as an independent petroleum development and operations consultant for PA Resources, Enquest and Petroceltic. He has proven expertise in successfully developing oil fields and leading operations in remote, onshore international locations, including in the Middle East/North Africa region. 

    Stuart has a BSc in Mechanical Engineering from Southampton University and an MSc in Petroleum Engineering from Imperial College, London.

  • Gabriel Papineau-Legris

    Gabriel Papineau-Legris

    Chief Commercial Officer

    Gabriel joined Gulf Keystone as Commercial Director in September 2016 and was promoted to Chief Commercial Officer in January 2020. 

    He has over ten years of experience in the energy industry. Prior to his appointment at Gulf Keystone, Gabriel worked in private equity at Lime Rock Partners where he was involved in investigating and executing E&P and oilfield services investment opportunities internationally as well as monitoring portfolio companies. Prior to that, he worked in investment banking at Perella Weinberg Partners and Merrill Lynch, where he started his career, advising oil majors, E&P companies and governments on M&A and restructuring transactions, and capital market financing.

    Gabriel graduated from HEC Montréal (BBA) and EDHEC Business School (MSc). He is also a CFA charterholder.

  • Jane Barker

    Jane Barker

    HR Director

    Jane joined Gulf Keystone as HR Director in July 2016.

    She has over 30 years’ experience in international and strategic HR in the oil and gas sector, including senior management roles with LASMO in London and Venezuela and as HR Director for Afren until 2016. Her early career was spent with Gulf and Chevron in the UK and she also spent five years in financial services as Head of HR for a UK insurance company. 

    Jane is a Business Studies graduate from the University of Otago.

  • Patrick Bersebach

    Patrick Bersebach

    HSE Manager

    Patrick Bersebach initially joined Gulf Keystone in 2013 as HSE Supervisor during the construction of PF-2 and was appointed to be the HSE Manager in 2016.

    Before joining Gulf Keystone, he gained international experience when working for RWE Dea, Wintershall, EON E&P and Nord Stream in Europe, Libya, Algeria and Russia. Patrick’s HSE experience embraces all areas of the E&P business from seismic via drilling to production in several roles on the shop floor as well as in management.

    Patrick holds an Engineering Diploma in Safety Engineering (Dipl.-Ing. / MEng. Equivalent) from Wuppertal University in Germany, a Vocational Qualification as Occupational Health and Safety Officer and gained a Qualification Certificate as Gas Processing Operator from SAIT in Canada.

  • Bertrand Demont

    Bertrand Demont

    Development Manager - Kurdistan Region of Iraq

    Bertrand joined Gulf Keystone as Country Manager in September 2017.

    Bertrand has over 18 years' experience in the development of new oil and gas fields, as well as the extension of producing fields, in the UK North Sea, Algeria, Indonesia, and France. During this time, he has managed country operations, corporate strategy, and led project engineering and construction work in remote onshore locations with operators including Total, BHP Billiton, Hess, and Petroceltic.

    He holds an M.Eng in Fluid Mechanics from the National Engineering School of Toulouse, France, and an MBA from Columbia Business School in New York.