From a largely shared heritage at ARCO through the 1990s the management team has subsequently brought success to several North Sea oil companies.  This team has now been enhanced by experienced talent brought in from other successful North Sea operators..

The Board of Zennor Petroleum Ltd comprises Dr Alan Parsley (Chairman), Martin Rowe (Managing Director), Rod Crawford (Technical Director), James Henry (Finance Director), Jason Cheng, Philip Jackson and John Daniel (Non-executive Directors).

The management team is supported by Marilyn Merryweather (Geophysical Advisor), Peter O’Mara (Geological Advisor), David Beaghan (Operations Director), Graham Cooper (Commercial Director)and Nick Shepherd (General Counsel), together with a number of talented technical, financial and administrative support staff and experienced associates who provide valuable drilling, technical and commercial expertise and support.


Martin Rowe

Managing Director

Martin Rowe co-founded Zennor and was appointed Managing Director in April 2014 on completion of a management buy-out. During 24 years in the oil and gas industry Martin has gained significant operational experience in reservoir, petroleum, production and drilling engineering, and has a strong background in the commercial and financial aspects of the upstream industry, including the negotiation of multiple asset acquisitions and divestments and UK North Sea hydrocarbon offtake agreements.

Martin graduated from Camborne School of Mines with a BEng in Mining Engineering.


Rod Crawford

Technical Director

Rod Crawford co-founded Zennor and has spent 34 years in the oil and gas industry undertaking acquisition, processing and interpretation of both land and marine seismic data. Rod’s wide experience includes the use of seismic inversion, attributes and reservoir characterisation over the whole range of geological environments: rifts, fold belts and forelands; both clastic and carbonate reservoirs; post/sub salt and sub basalt targets. Additionally, Rod has been an active member of several multi-disciplinary teams looking at projects as diverse as frontier exploration, prospect definition, field development studies and equity determinations.

Rod graduated from the University of Wales with a BSc in Geophysics.


James Henry

Finance Director

James Henry has been Zennor’s FD since 2007 and has strong experience of upstream oil and gas sector financial, commercial and joint venture accounting issues. James had a key role in the Company’s MBO in April 2014 and in the acquisition by Kerogen in August 2015. Previously James spent 21 years in the financial services sector including senior management roles at LIFFE, The London Clearing House and Cargill Investor Services.

James qualified as a chartered accountant with Arthur Young after gaining a BSc in Geology from Exeter University.


Nick Shepherd

General Counsel

Nick is a specialised upstream lawyer with 25 years of industry experience, having had a number of senior in-house legal roles.  He joined Zennor in July 2017, having most recently been Regional General Counsel at Tullow Oil plc for a number of years, where he was responsible for managing the legal team in the London Head Office. Previously Nick held a number of senior legal roles in Paladin Resources plc, BHP Billiton Limited and Premier Oil plc, all in which he worked both internationally and in the UKCS. He has also advised a large number of other independents over the years with respect to their upstream operations. 

Nick graduated from Exeter University with a law degree and is admitted as a solicitor in England and Wales.



Marilyn Merryweather

Geophysical Advisor

Marilyn Merryweather has over 39 years oil and gas industry experience mainly gained at Amoco and ARCO. She is an interpretation geophysicist and prospect generator and has acquired extensive knowledge and expertise in all aspects of sub-surface exploration, appraisal and field development. Following the acquisition of ARCO, Marilyn worked for BP, Tullow and EOG Resources and in 2006 joined the technical team at Zennor helping them to establish and grow their asset base in the UK.

Marilyn graduated with a BSc in Geology from Durham University, followed by an MSc in Marine Earth Science from University College, London. She is a member of the Petroleum Exploration Society of Great Britain.


Peter O’Mara

Geological Advisor

Peter O’Mara has 24 years oil and gas industry experience gained at ARCO, Ruhrgas, EOG Resources and Zennor. Peter is a geologist with knowledge and expertise in all aspects of exploration and field development and management. During his early career he worked in the development of several oil and gas fields and has extensive experience of new venture evaluations and developing exploration and appraisal portfolios of both conventional and unconventional resource opportunities in the UK, Continental Europe and North Africa.

Peter graduated from Leicester University with a BSc in Geology, followed by an ARCO-funded studentship, resulting in an MSc from Durham University for research in Carboniferous sedimentology. He is a member of the Petroleum Exploration Society of Great Britain.


David Beaghan

Operations Director

David Beaghan has 27 years of oil and gas industry experience in planning and managing drilling operations. This experience includes UK and international exposure, onshore and offshore operations and periods supervising operations at the well site. David has worked with a variety of operators ranging from large multinationals to small independents and was the Drilling Manager for the three offshore UK North Sea wells drilled by Zennor North Sea Ltd (formerly MPX North Sea Ltd), as licence operator in the period 2012-14.

David graduated from University of Birmingham with a MEng in Civil Engineering and he is also a Chartered Mining Engineer.


Graham Cooper

Commercial Director

Graham is a geologist with over 35 years of industry experience, of which the last 20 have been spent in commercial and business development roles.  He joined Zennor in January 2016 from EnQuest plc where, as Head of Business Development since 2011, he was responsible for delivering a large number of North Sea focused acquisitions. Previously Graham held a number of senior commercial roles in Shell, including Vice President – Commercial for Shell International Global Exploration and Head of the Commercial Academy for the entire Shell Group. He also served as a Non-Executive Director of AIM-listed Ascent Resources PLC between 2011 and 2013. 

Graham graduated from Cambridge University with an MA in Natural Sciences.




Tushar Kumar

Non-executive Director

Tushar Kumar is part of Kerogen Capital’s Investment and Portfolio Management Team. He has over 16 years’ experience in investing, investment banking and equities, working with a range of oil and gas companies including upstream, downstream, majors and national oil companies across Europe, the Middle East and Asia. He has experience in investing in the energy sector as well as strategic advisory, particularly focused on M&A, IPOs, debt and equity financing as well as balance sheet restructuring. Prior to joining Kerogen, he was an executive director at Morgan Stanley’s natural resources group in London, having previously worked with members of the Kerogen team at J.P. Morgan’s energy and natural resources group in Hong Kong.


Tushar holds an MBA from the Indian Institute of Management Ahmedabad (IIMA) and a BTech in computer science and engineering from the Indian Institute of Technology (IIT). He is also a CFA charter holder.


Jason Cheng

Non-executive Director

Jason Cheng is the Managing Partner and co-founder of Kerogen Capital. Jason has over 20 years’ commercial experience across investing, operations and investment banking. He was the Managing Partner of Ancora Capital, and the manager of the Prior Fund. Before this, he was a managing director of Jade International Capital Partners Limited in Beijing, where he was involved in Sino-foreign investments and advisory assignments. He previously worked in investment banking at J.P. Morgan in the Energy and Natural Resources Group and prior to this at Schroders, in both the energy and the Asian M&A teams. Jason is also a Non-executive Director of independent oil and gas company, Buried Hill Energy.

Jason holds an MSc (finance and management) from the University of Sydney and a BSc (economics and econometrics) from the University of Melbourne.


Alan Parsley


Dr Alan Parsley is an Executive Board Member of Kerogen Capital. He has over 45 years’ experience in the oil and gas industry, predominantly at Shell, where he held senior positions including Global Head of Exploration and Head of New Business Ventures. In his later career, he became Chief Executive of Shell Syria and Chairman of Shell Australia. He formerly served as a member of the Board of Woodside Petroleum Ltd. and is currently an independent Non-executive Director of the independent oil and gas company, Buried Hill Energy.

Alan graduated from the University of Edinburgh and holds a BSc and a PhD in Geology. He was a member of the Court of Heriot-Watt University from 2005 to 2011.


Philip Jackson

Non-executive Director

Philip Jackson is an Executive Board Member of Kerogen Capital and serves on its Investment Committee. He has 35 years’ experience in investments and corporate finance in energy and infrastructure projects. Philip is on the boards of New Age (African Global Energy) Limited and Singapore-listed Macquarie International Infrastructure Fund Limited. He was the founder and former Chief Executive of J.P. Morgan Asset Management’s $860 million Asian Infrastructure and Related Resources Opportunity Fund. Philip was with J.P. Morgan (and heritage Jardine Fleming) for over 20 years, leading their energy and infrastructure advisory businesses, advising on restructuring, M&A and privatisation. He started his career with the energy team at Ashurst LLP before moving to its client Trafalgar House plc, one of the UK’s leading independent oil and gas and construction companies.

Philip graduated with an MA in law from the University of Cambridge and is a solicitor of the Supreme Court in England.