Pharos Energy is guided by a board with diverse experience, knowledge, skills and backgrounds.

This diversity gives us a wide and well-informed global outlook, and drives our strategy based on business efficiency and increasingly valuable new ventures.

Board of Directors

Experienced leaders guiding our future


John Martin

Non-Executive Chair

Appointed: October 2019

Read Bio

John has more than 30 years’ experience in international banking in the oil and gas industry and was a Senior Managing Director in the Oil and Gas team at Standard Chartered Bank. Prior to joining Standard Chartered in 2007, John worked for ABN Amro for 26 years, specialising in the energy sector. John has served as the Senior Vice President of the World Petroleum Council, and as an Independent Non-Executive Director of Rockhopper Exploration plc. He was previously Chairman of Falkland Oil and Gas Limited, an Independent Non-Executive Director on the board of Bowleven plc and, an Independent Non-Executive Director and Chair of the Audit Committee of Total E&P UK Limited.


Jann Brown

Chief Executive Officer

Appointed: 23 March 2022

Read Bio

Jann Brown was appointed to the role of Chief Executive Officer with effect from 23 March 2022. Jann served as co-head of the Company's Business Development group between February 2017 and November 2017 before her appointment to the Board. Jann currently serves as an Independent Non-Executive Director and Chair of the Audit Committee of the Scottish Ballet. She is also an Independent Non-Executive Director of RHI Magnesita N.V. Jann previously served as an Independent Non-Executive Director and Chair of the Audit Committee of Troy Income, Growth Trust plc and of John Wood Group P.L.C. and was formerly the Managing Director, Chief Financial Officer and Executive Director of Cairn Energy plc where she had responsibility for project managing Cairn India Limited’s initial public offering. Jann also previously served as the Joint Chief Executive Officer and Chief Financial Officer at Magna Energy Limited, of which she was also co-founder and is a past president of the Institute of Chartered Accountants of Scotland.

Sue Rivett

Sue Rivett

Chief Financial Officer

Appointed: 1 July 2021

Read Bio

Sue Rivett, previously Group Head of Finance and UK General Manager, has been with the Company for over five years. Prior to joining Pharos, Sue held senior finance roles with Conoco, ARCO British (subsidiary of Atlantic Richfield Company), JKX Oil & Gas plc and Seven Energy. Sue's various roles have included heading up full FTSE finance functions including finance, taxation, treasury, IT, corporate planning and Company Secretary. She was Head ofARCO British trading arm's back office and mid office and has considerable joint venture experience and numerous years M&A experience. Sue is a Fellow of the Chartered Institute of Management Accountants ("FCMA") with international experience and over 37 years in the energy business.


Geoffrey Green

Non-Executive Director, Senior Independent Director

Appointed: 20 May 2020

Read Bio

Geoffrey has many years of legal and commercial experience in advising major UK listed companies on corporate and governance issues, mergers and acquisitions and corporate finance. Geoffrey retired as a partner of Ashurst LLP in 2013, a leading international law firm, after 30 years as a partner and 10 years of service as the senior partner and chair of its management board. He served as head of Ashurst’s Asia practice from 2009 to 2013, based in Hong Kong, and was responsible for leading the firm’s strategy and business development for the region. He served on the Board of Vedanta Resources Limited, (formerly Vedanta Resources plc, a London Stock Exchange listed company) from 2012 to 2021 and was Chair of the Remuneration Committee. Geoffrey was the non-executive Chair of the Financial Reporting Review Panel, one of the main subsidiary bodies of the Financial Reporting Council, from 2015 to 2022, and is also a non-executive director of a Hong Kong based investment fund. He has a degree in law from Cambridge University and qualified as a solicitor at Ashurst LLP.


Marianne Daryabegui

Non-Executive Director

Appointed: 15 March 2019

Read Bio

Marianne is currently a Managing Director at Natixis, and was previously the Head of Natural Resources at BNP Paribas in Paris, France. She has extensive experience in oil and gas corporate transactions and capital markets and has advised oil majors, independent E&Ps and national oil companies. Prior to leading the Oil and Gas Corporate Finance Team in 2006, Marianne worked for eight years in BNP Paribas’ Energy Commodities Export Project Department where she headed the Commodity Structure Finance team for the Middle East and Africa. Before joining the banking sector Marianne spent eight years at TOTAL. Marianne has a Master’s degree in Finance and Capital Markets from Sciences Po University, Paris and a Masters in Tax and Corporate Law.


Lisa Mitchell

Non-Executive Director

Appointed: 1 April 2020

Read Bio

Lisa is an experienced CFO with over 25 years’ international experience, across the oil and gas, mining and the pharmaceutical industries and is currently the Chief Financial Officer and Executive Director of Orca Energy Group Inc., a TSX-V listed company. She was most recently a Non-Executive Director of Wiluna Mining Corporation Limited, was previously CFO of San Leon Energy plc, and was CFO and Executive Director of Lekoil Limited, the African-focused oil and gas exploration and production company with interests in Nigeria. Prior to this, Lisa was CFO and Executive Director at Ophir Energy plc, formerly a FTSE 250 company where she was responsible for contributing to the overall business strategy of Ophir; leading the finance function including all financial, taxation, treasury and funding requirements and investor relations. Lisa’s previous roles include CSL Limited, and Mobil Oil Australia. Lisa is a Certified Practicing Accountant (CPA Australia) and holds a Bachelor of Economics (major in Accounting) from La Trobe University, Melbourne and a Graduate Diploma in Applied Corporate Governance from the Governance Institute of Australia.

Management team

Our management team works across every part of the company, bringing their experience and perspective to the strategic development of the business.

Ed Story

President of Vietnam business

Mike Watts

Managing Director

Mohamed Sayed

Group Head of Technical & General Manager - Middle East

Vincent Duignan

Group Exploration Manager & General Manager - South East Asia