Meet our Experts

Meet our Experts

Here we introduce some of the experts in GCA’s regional offices

- GCA's regions are: - Europe, Africa, Middle-East, Russia & Caspian - North and Latin America - Asia Pacific -
Dr D. Nathan Meehan

Dr D. Nathan Meehan

- Managing Director

Dr D. Nathan Meehan is a US licensed professional engineer with more than 40 years of global experience in reservoir engineering, reserves estimation, arbitration, field studies, hydraulic fracturing and horizontal well expertise.  He is the 2016 President of the Society of Petroleum Engineers (SPE) and has served on Boards of international oil and gas operating companies, service companies and software firms.  He is the recipient of multiple awards and has published more than 70 technical articles and three books.  

In Europe, Africa, Middle-East, Russia & Caspian

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John Gaffney

John Gaffney

- Regional Director: EAME & RC - john.gaffney@gaffney-cline.com

John is the Regional Director for GCA in Europe, Middle East, Africa, Russia and the Caspian.  He has a diverse management background including over 15 years' international experience in Europe, South-East Asia, the Middle East and South America and is a member of SPE and SEAPEX

Felix Aquing

Felix Aquing

- Senior Advisor: West Africa - Felix.Aquing@gaffney-cline.com

A geologist with 40 years' oil industry experience, including 25 years at Shell, Felix's extensive experience ranges from wildcat exploration through to brown-field redevelopment.  At GCA he is a focal point and project manager for many West Africa projects and works closely with leading financial institutions.

Dr. John Barker

Dr. John Barker

- Technical Director: Reservoir Engineering - john.barker@gaffney-cline.com

Over 32 years John has worked on oil, gas and gas-condensate fields of all types.  An acknowledged expert in reservoir simulation and its use in reservoir development planning, he has extensive experience in reserves/resources estimations for stock market and other purposes and is a member of the SPEE.  He has also been Executive Editor of the SPE Reservoir Engineering journal.

Jeremy Berry

Jeremy Berry

- Global Business Development Director - jeremy.berry@gaffney-cline.com

Jeremy has a geoscience background and over 35 years’ industry experience.  He also has a broad understanding of related disciplines and business integration and practical experience of reserves/resources, asset valuation, M&A activities and new technologies.  Jeremy has worked extensively in Sub-Saharan Africa and presents widely on the subsurface and business opportunities there.  

Mike Cline

Mike Cline

- Executive Director & Principal Advisor: Business Strategy and Legal Counsel - michael.cline@gaffney-cline.com

Mike leads GCA’s Corporate Strategy Group and has over 30 years experience, including senior advisory engagements for national oil companies and sovereign institutions.  He develops the commercial and legal frameworks for foreign private investment and integrated project development in their oil and gas sectors.  

Charles Goedhals

Charles Goedhals

- Principal Consultant: Development Planning - charles.goedhals@gaffney-cline.com

Charles, a Principal Consultant at GCA, has over 35 years experience in oil and gas project management and associated technical and commercial functions.  Charles advises on field development definition, project execution planning, facilities engineering, cost estimating, and project management and surveillance.

Dr Mead Hussain

Dr Mead Hussain

- Senior Advisor: Reservoir Engineering - mead.hussain@gaffney-cline.com

Mead is a UK Chartered Engineer with over 30 year's industry experience worldwide, especially in Iraq, Libya, the Caspian region and Sub-Saharan Africa.  She is experienced in field development planning, reserves and resources assessments and is a long-standing contributor to governmental advisory projects.  Me'ad is also bi-lingual in English and Arabic. 

David Jarrett

David Jarrett

- Senior Consultant: Geoscience - David.Jarrett@gaffney-cline.com

David is a geoscientist with a particular expertise in geological modelling and reservoir characterisation in support of reserves estimation, reservoir simulation, equity negotiation and technical due diligence.  He has focussed particularly on East and West Africa and the Eastern Mediterranean

Rebecca Jones

Rebecca Jones

- Senior Geoscience Advisor - Rebecca.Jones@gaffney-cline.com

Rebecca has 25 years international subsurface and business development experience with both large and independent Operators.  Her geological specialism is in stratigraphic and sedimentological integration and conceptual modelling.  She is skilled in strategic growth and portfolio management and has proven new country entry experience.  

Rand Al-Obaidy

Rand Al-Obaidy

- Senior Petroleum Engineer & North Africa BD Manager - rand.alobaidy@gaffney-cline.com

Rand is a Petroleum Engineer with worldwide experience but a particular focus on Egypt.  Her expertise is in oil and gas field development, reserves and resource evaluation and technical due diligence. Rand is bilingual in English and Arabic.

Ryan Pereira

Ryan Pereira

- Principal Commercial Manager, Global Gas and LNG - ryan.pereira@gaffney-cline.com

Ryan has a global role advising on monetisation of oil and gas. His key areas of expertise include commercial and finance leadership, LNG market development and contracts, M&A, economics, valuations, project delivery, business / strategy consulting, new country entry and set up, organisational design and integration.

Sam Phillips

Sam Phillips

- Senior Advisor: Commercial and Development Planning - Sam.Phillips@gaffney-cline.com

Sam is a Chartered Engineer with 35 years' oil industry experience in commercial and project management and facilities engineering.  He advises on field development planning and regulatory compliance and on contractual issues around M&A activities, petroleum product handling, sales and project financing.

Richard Poole

Richard Poole

- Technical Director: Midstream & Downstream - richard.poole@gaffney-cline.com

Since his early career in the refining and chemical industry, Richard has been at GCA for over 25 years. As well as upstream advisory work, he has core midstream/downstream expertise in technical, commercial and strategic assignments in gas/pipeline/refining asset due diligence, gas monetisation, hydrocarbon product/market analyses and contracts.  

Drew Powell

Drew Powell

- Global Operations Director - drew.powell@gaffney-cline.com

Drew currently Global Operations Director for GCA based in the United Kingdom. He is responsible for ensuring the delivery of high-quality pertinent advice to GCA's clients. Drew is a chemical engineer with over 20 years’ petroleum industry experience and with a particular expertise in oil and gas field development, cost estimating and technical due diligence

Chris Rachwal

Chris Rachwal

- Technical Director: M&A and Strategy - chris.rachwal@gaffney-cline.com

A Technical Director with over 30 years' experience,  Chris is a key member of GCA’s Mergers and Acquisitions business practice. In conjunction with leading legal and financial organisations he leads multi-disciplined project teams assisting clients with asset/company purchases or sales.  He provides strategic business insight and technical assistance to oil companies and governments worldwide.

Richard Smith

Richard Smith

- Principal Advisor: Petroleum Engineering - Richard.Smith@gaffney-cline.com

Richard is a senior petroleum engineer with 40 years experience gained in the USA, South America, Middle East and Europe.  For several years he was Reserves Manager at a major IOC and now at GCA he provides reserves and litigation expertise, third party opinions, integrated studies and general consulting in reservoir engineering, simulation, production forecasting, and auditing

Dr Nick Stronach

Dr Nick Stronach

- Senior Advisor: Geoscience - nick.stronach@gaffney-cline.com

Nick is a Senior Advisor in Geoscience, with 35 years’ experience with international petroleum operating and consulting companies.  He has a wide international knowledge of sedimentary basin evolution, petroleum and reservoir geology and petroleum system and play analysis and is a UK Chartered Geologist.

Jonathan Westbury

Jonathan Westbury

- Senior Commercial Business Advisor - jonathan.westbury@gaffney-cline.com

Jonathan has over 37 years of experience in the petroleum industry.  During 26 years at Shell, he held the positions of Hydrocarbon Maturation Planning Lead, Head of Reserves Reporting and Geoscience Discipline Chief. Jonathan led and was involved in projects covering business development, field developments, and corporate business planning and reporting.  

Mike Wood

Mike Wood

- Technical Director: Development Planning - mike.wood@gaffney-cline.com

Mike, a Technical Director at GCA, has over 35 years' in the oil and gas industry, with experience in a wide range of technical and commercial functions.  Within GCA Mike provides advice on field development planning, project execution, facilities definition, cost estimating, and economic analysis, with a focus on technical / commercial due diligence for project finance or asset acquisition.  

Dr. Stephen Wright

Dr. Stephen Wright

- Technical Director: Geoscience - stephen.wright@gaffney-cline.com

Stephen is Technical Director and a senior Geoscientist with more than 30 years’ experience with major oil companies including Shell, Enterprise, BP and Texaco.  Stephen is particularly involved in the assessment of oil and gas Reserves and Resources and the evaluation of exploration portfolios. He has worked in Europe, Central Asia, Middle East, Africa, the Far East and Latin America.

In North and Latin America

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Bob George

Bob George

- Regional Director: Americas - bob.george@gaffney-cline.com

Bob is the Regional Director for GCA's activities in the Americas region and is a Senior Strategic Advisor with over 40 years’ experience in the international oil and gas industry. He actively participates in and manages GCA’s advisory activities relating to financial, strategic assistance, government policy as well as expert opinion and testimony.

Carlos Alvarez

Carlos Alvarez

- Senior Advisor: IOR/Reservoir Engineering - Carlos.Alvarez2@gaffney-cline.com

Carlos has more than 25 years oil industry experience in Venezuela, Mexico, Norway and USA. Carlos's career has focused on Improved/Enhanced Oil Recovery (IOR/EOR), and bringing these processes into the Field Development Plans for mature and extra-heavy oil reservoirs.  He provides technical assistance to clients worldwide and gives training courses on IOR for conventional and unconventional reservoirs. 

Daniel Amitrano

Daniel Amitrano

- Principal Advisor: Reservoir Engineering - daniel.amitrano@gaffney-cline.com

Daniel is a senior reservoir and petroleum engineer with over 25 years of experience in the international oil and gas industry.  He has an excellent technical background and his geographical areas of experience include Venezuela, Bolivia, Mexico, Peru, Ecuador, Gulf of Mexico, Colombia, Brazil and Argentina (North, West and South basins).

William B Cline

William B Cline

- Strategic Advisor - bill.cline@gaffney-cline.com

Bill has over 30 years' experience in the international oil and gas industry and has managed many of GCA's engagements with NOCs, governments and ministries in the Americas, Europe, Africa, Asia and the Middle East.  He combines GCA's technical and commercial analysis into integrated, decision-making support and advice, particularly with respect to property valuations (for transactional or dispute resolution purposes).  Bill also develops commercial and fiscal arrangements to link private sector capital and technology with sovereign or public sector petroleum resources. 

Alan Cunningham

Alan Cunningham

- Technical Director: Commercial - alan.cunningham@gaffney-cline.com

Alan is a Technical Director in GCA’s Houston office. He has over 40 years’ experience in the international oil and gas arena and has led organizations with as many as 2,000 employees. He has held senior technical and executive roles with Union Texas in Houston, Singapore and Jakarta and more recently as an energy policy specialist with The World Bank. Alan currently advises on fiscal policy, field development planning, reservoir performance and license round management. 

Nick Fulford

Nick Fulford

- Global Head of Gas and LNG - nick.fulford@gaffney-cline.com

Nick is Global Head of Gas and LNG for GCA, with 30 years of experience at British Gas, Centrica and Direct Energy, where he has held various senior executive and planning positions.  Nick was actively involved in British Gas’ early LNG growth prior to becoming assistant to Chief Executive Sir Roy Gardner where he played a major part in Centrica’s demerger. Nick subsequently led the company’s move into North America where he developed the strategy and executed the acquisition of Direct Energy. For the last three years, Nick’s focus has been on unconventional resource opportunities in the US and Canada.

Cesar Guzzetti

Cesar Guzzetti

- Principal Advisor: Latin America General Manager - cesar.guzzetti@gaffney-cline.com

César manages GCA's activities in the Southern Cone of South America, notably Brazil, Argentina, Bolivia and Peru and is based in GCA's Buenos Aires office. He has over 30 years of project evaluation experience in negotiations, engineering and operations and considerable expertise in Project Management, Field Evaluation and Development, Reservoir Management and Project Valuation. César has travelled widely and his career has taken him to live and/or work in the FSU and Caspian, Asia, China, South, Central and North America and the Caribbean.

Carlos Jorda

Carlos Jorda

- Technical Director: Midstream & Downstream - carlos.jorda@gaffney-cline.com

Carlos is a Technical Director in GCA’s downstream strategy group,  with almost 40 years of experience in the international oil and gas industry. He has served at the highest executive levels in refining and marketing, corporate planning, and as president of PDV America and chairman of the Citgo board of directors. Carlos leads GCA's midstream/downstream activities in North and Latin America. 

Scott Monette

Scott Monette

- Senior Business Development Manager: Mexico and Commercial - scott.monette@gaffney-cline.com

Scott is based in GCA's Houston office, with over 23 years of industry experience with major oil and gas services companies, independent oil companies, and boutique consulting firms. He has a strong background in financial modeling, statistics, international economics, strategic planning, and techcnical oil and gas operations. Scott’s multi-disciplinary background has enabled him to build a wide professional network and vast international experience on multiple continents.

Rawdon Seager

Rawdon Seager

- Technical Director: Global Quality Assurance - rawdon.seager@gaffney-cline.com

Rawdon is a Technical Director responsible for Global Quality Assurance within GCA and has over 40 years of experience in the international oil and gas arena. He has managed numerous field studies, reserve assessments, and asset evaluations. He has made presentations within the industry relating to reserves estimating and reporting issues and has given expert testimony during arbitration hearings. He is Past-Chairman of the SPE Oil and Gas Reserves Committee.          

In Asia Pacific

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Florent Rousset

Florent Rousset

- Regional Director: Asia Pacific - florent.rousset@gaffney-cline.com

Florent is the Regional Director for GCA in Asia Pacific, based in Singapore.  Florent specializes in providing commercial advisory to upstream players and Sovereigns in Asia Pacific, Middle East, Africa, North and South America.  Prior to this, Florent worked in economics and commercial roles within Baker Hughes and GCA based in Singapore and Houston, Texas.  Florent previously worked for Schlumberger Business Consulting based in Paris and Singapore.

Arse Clarijs

Arse Clarijs

- Technical Director: Geoscience - arse.kusumastuti@gaffney-cline.com

Arse is a Technical Director with GCA in Singapore and has over 24 years petroleum industry experience in geoscience. Arse joined GCA in 2004 and has been managing and contributing to Reserves and Resources assessments for conventional and unconventional resources, basin studies, project acquisitions and divestments, as well as assets farm-out assistance. Arse previously worked for major and independent oil companies including Eni, Lasmo, Huffco and Lapindo.

Andrew Duncan

Andrew Duncan

- Principal Advisor: Facilities & Costs - andrew.duncan@gaffney-cline.com

Andrew is a Chartered Engineer (IMech E.) with a background in Facilities Engineering who has over 30 years of worldwide experience including at several international operating companies. He is an experienced project manager who has held a wide number of senior leadership roles within Southeast Asia, especially Indonesia. Additionally Andrew has experience of acquisitions and divestments in his NBD roles for various Operators and with GCA.  He is a member of the Association of International Petroleum Negotiators (AIPN), Society of Petroleum Engineers (SPE) and Southeast Asia Petroleum Exploration Society (SEAPEX).

David Hayes

David Hayes

- Senior Advisor: Commercial/Business Development - david.hayes@gaffney-cline.com

David is a corporate planner with 23 years’ experience in the Asian oil industry with strengths in Mergers & Acquisitions (M&A), business analysis, strategic planning, business development, valuations, and project evaluation. He has held positions in Caltex, ExxonMobil, Singapore Petroleum Company, Commonwealth Bank of Australia and Scotia Waterous, based in Singapore.   He is a member of the Society of Petroleum Engineers (SPE) and Southeast Asia Petroleum Exploration Society (SEAPEX). 

Hu Yundong (Don)

Hu Yundong (Don)

- Senior Advisor: Geoscience - yundong.hu@gaffney-cline.com

Yundong joined GCA in 2008. He had previously worked as a Senior Engineer for PetroChina and an official consultant for the Petroleum Reserves Office (PRO) of China for more than twenty five years. His experience is mainly in oil and gas Reserves estimation, management, and resource policy study. 

Zis Katelis

Zis Katelis

- Technical Director: Geophysics - zis.katelis@gaffney-cline.com

Zis Katelis has a career spanning over 20 years working on seismic processing, interpretation projects and workflows, log data integration as well as contributing to and leading integrated technical studies.  He has held various management positions for a major international oil and gas service company for both technical and operational business segments in Australia, Asia and the Middle East. Zis advises on exploration and development technical projects as well as contributing to Reserves and Resources assessments and technical and commercial studies for conventional and unconventional reservoirs.

Stephen Lane

Stephen Lane

- Technical Director - stephen.lane@gaffney-cline.com

Stephen is a Technical Director with GCA in Singapore and has over 30 years’ experience of providing geological and petrophysical expertise to worldwide clients. Stephen has frequently been involved in the valuation of E&P assets for acquisition and divestment purposes and production of public documents such as Competent Person’s Reports. Wide-ranging exposure and experience of assessing both in-place and recoverable Reserves, including understanding of the inherent uncertainties associated with volumetric or production-based estimates

Doug Peacock

Doug Peacock

- Technical Director - doug.peacock@gaffney-cline.com

Doug is a Technical Director with GCA in Singapore and has over 30 years’ experience in geology and petrophysics with a particular emphasis on 3D reservoir modelling. His geological modelling experience covers all types of reservoirs in many parts of the world and ranges from building models for field development planning and reserves estimation purposes to reviewing and auditing models built by others. He has also worked extensively on reserves estimating, unconventional reservoirs, acquisitions and divestments as well as technical projects.  Doug was an SPE Distinguished Lecturer in 2010-11 and was recently a member of the SPE Oil and Gas Reserves Committee.

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