Graham Kellas

Graham has over 30 years experience as a petroleum economist, specialising in the modelling and analysis of global petroleum fiscal systems.

He has advised several governments on petroleum fiscal policy, most recently Colombia, Ireland, Newfoundland & Labrador (Canada) and South Africa.  He has also advised numerous IOCs and oil industry associations during debates with governments on appropriate terms (e.g. Alaska, Australia, Nigeria and UK).

Graham oversees Wood Mackenzie’s fiscal information gathering, modelling and reporting and is the lead author of Wood Mackenzie’s multi-client reports comparing global fiscal systems. The latest study is “A balancing act: global fiscal trends and benchmarking” (October 2016). He also has wide experience delivering training courses in petroleum economics and fiscal analysis around the world.

Graham graduated in Economic Science from Aberdeen University and earned a masters degree (M Litt) for his thesis on ‘Oil Field Abandonment in the UKCS’.  He previously worked for Petroconsultants, two independent oil exploration companies and as a Research Fellow in Aberdeen University’s Economics department.

He is a member of the Association of International Petroleum Negotiators (AIPN) and is a regular speaker at industry conferences.


Thomas E. Valentine

Tom Valentine has more than 30 years of experience in the oil and gas industry, both as a barrister and a solicitor. In 2002 and 2003, Mr. Valentine lived in Doha, Qatar, where he was senior counsel (projects) with Qatar Petroleum. While in Qatar, Mr. Valentine was responsible for a number of international gas and LNG projects, including projects in the United Kingdom (Qatargas II), India (RasGas) and Spain (Endesa Generacion).

Since returning to Canada in 2004, Mr Valentine’s work continues to focus on oil, gas (including LNG) and project development work, including fiscal regime analysis and negotiations, E&P work, joint venture structuring, joint operations issues, purchase and sale agreements, and decommissioning obligations.

Tom has continued his work on LNG projects around the globe. He has advised both governments and project sponsors on LNG projects in Canada (West and East coasts), the USA, the United Kingdom, Peru, Cyprus, Angola, Qatar, Australia, Uruguay, Nigeria, Yemen, the UAE, and Iran.

Tom also provides training seminars around the world on LNG Contract Law and LNG Project Structuring appearing regularly in Amsterdam, Doha, Dubai, London, Houston, Brazil and Singapore.

Tom obtained his B.A. from the University of British Columbia in 1983, his LL.B. from Dalhousie University in 1986, and his LL.M. from the London School of Economics in 1989. He received the Mabrouk Award from Qatar Petroleum in 2003 and is rated by Martindale & Hubbell’s Legal Counsel Rating System as “Very High to Pre-eminent”. He received the R.P. Bamford Award for Academics from Dalhousie University, and the Award of Excellence from the Canadian Petroleum Law Foundation.

Alan Mayo

Alan Mayo is an accounting and finance professional with twenty-five years of experience. For the past seventeen years Alan has specialised in consulting and the delivery of in-house and public financial training delivering programmes in IFRS, local GAAP, interpretation of financial reports and financial management. During this time he has worked across many sectors and in many countries. Within the oil, gas and petrochemicals sector Alan has worked on IFRS and financial reporting and performance issues with finance teams from Shell, Eni, Kogas, Petronas and Mubadala Development Co.

Previously as a senior consultant with PwC he led a team of financial training consultants responsible for developing and delivering programmes in financial reporting, business valuation and shareholder value. Alan started his career at PwC, where he worked for eight years in London in their audit and business advisory division where he obtained his chartered accountancy qualification. After qualifying he was seconded for two years to their Paris office. On his return to London from Paris he co-founded the client training business for PwC in London.

Alan now runs a successful financial training company based in the UK and splits his time between managing that business and instructing on IFRS. Alan is a Fellow of the Institute of Chartered Accountants in England and Wales, a member of their finance and management faculty and has an Honours Degree in Economics from Bristol University.

Ronnie Tucker

Ronnie Tucker is a seasoned Irish business executive and financial and economic consultant with extensive practical experience.  He has worked as a corporate business process reengineering Project Director in Helsinki, as a CFO/COO in New York, as a Director of Corporate Risk Management in Brussels and as a Financial Analyst in Silicon Valley, California.  He has been a board member in Belgium, France, Ireland, Italy, Netherlands, UK and USA and has sat on a number of board audit, finance and governance sub-committees.  He holds an MBA from Stanford University.

Since 1997 he has trained 4,500+ non-financial and finance managers in multinationals, government ministries and management institutes in economics, finance and accounting.  He is a Visiting Lecturer at Hebei Finance University in Baoding, People’s Republic of China.  He has taught on the MBA programme at the National University of Ireland.  He is an expert at creating, developing and delivering excellent learning experiences for non-experts in economics, finance and accounting.  Ronnie also holds Cambridge University’s CELTA qualification for teaching of English as a foreign language, specialising in Business English.

From 2012 to 2016 he was a Divisional Director with the Indecon Group of international financial and economic consultants.  Since 2016, Ronnie has been Managing Partner of IMEF International.

Ronnie has a particular interest in the oil and gas industry and has studied petroleum engineering practices. In 2012 he taught MP’s and civil servants from the Ministries of Finance and Natural Resources in Kurdistan, Iraq on production sharing contracts. He has worked for Saudi Aramco, ExxonMobil and Schlumberger.  He trained government officials in Myanmar in energy project economics and finance.  He conducted cost-benefit appraisals of infrastructure projects for the Office of the Prime Minister of Malta.  This also involved knowledge transfer to the Prime Minister’s staff.  He tailored a finance programme for Solvay corporate lawyers and customised a programme in competitive profitability and shareholder value for high-potential senior managers at UCB Biopharma.  Ronnie shares his experience of working in many industries including electricity, petroleum, pharmaceuticals, chemicals, logistics, retail, forest products, hospitality, ports and others.  He has worked in oil and gas worldwide including extensively in the Middle East, Africa and Asia (Algeria, Dubai, Egypt, Ghana, Iran, Kazakhstan, Kenya, Kurdistan (Iraq), Malaysia, Morocco, Myanmar, Nigeria, Oman, Pakistan, People’s Republic of China, Saudi Arabia, Singapore, South Africa, Syria, Thailand, Tunisia, Uganda and Zimbabwe).


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