Management Team


John Claussen, Chief Executive Officer

John P. Claussen joined Madagascar Oil Company as Chief Executive Officer in June 2016, based in Antananarivo, Madagascar.

John’s international energy career spans more than thirty-five years within upstream oil & gas, enhanced oil recovery, commercial & business development, power and electricity, public & media relations, and community development.  John retired from Chevron, including as Poland Country Manager, and management roles which provided experience with steamflood development at Duri Field in Indonesia, evaluation of heavy oil fields, and co-generation plant development providing enhanced energy efficiency through combined steam and power to steamflood and oil-refining operations.  John has lived with his family in international locations in Asia, Africa, Europe, and Eurasia while developing global energy projects in Poland, Indonesia, UK, Singapore, Vietnam, Thailand, China, Nigeria, Angola, Russia, Australia, and the USA.  John served in a number of industry and business associations, including the Polish Oil & Gas Producers Organization, AmCham, Southeast Asia Petroleum Exploration Society, Indonesia Petroleum Association, and Society of Exploration Geophysicists.

John holds a Bachelor of Science degree in Engineering and a Master of Science degree in Geophysics from the Colorado School of Mines; and a Masters degree in Business Administration, with Honors, from St. Mary’s College of California.

Stuart Wesson, Chief Financial Officer

Stuart Wesson joined Madagascar Oil in October 2012 and is based in Madagascar. His background has been as a Finance Director / Manager within Oil & Gas, Petrochemical and Infrastructure Projects during the past 35 years, within Denmark, Japan, Indonesia, Angola, Algeria and Madeira. More recently he was Finance Manager for KBR in Madeira, controlling the finance function for KBR’s Bonny Island LNG Project in Nigeria. Prior to this he has worked on Projects for Total, Chevron, Texaco, Shell, AP Moeller, BP Chemicals, CNR/Ranger Oil and PPLI/Bimantara. Mr. Wesson FCCA, is a Fellow of the Chartered Association of Certified Accountants, having qualified in the UK in 1978.


Princia Ratrimo, Administration & Human Resources Manager

Princia Ratrimo joined Madagascar Oil in September 2011. She has started her career in the oil industry in 2007 as Madagascar Representative of Roc Oil (Madagascar) Pty Ltd, a subsidiary of Roc Oil Company Ltd which is one of Australia’s leading upstream oil and gas companies and was the operator of the Belo Profond Block, offshore Madagascar, during 4 years. Prior to joining Roc Oil, she worked for 10 years for international development NGOs and companies such as Management Sciences for Health and Chemonics International and held several positions such as Auditor, Grants Coordinator, Deputy Finance and Administration Manager and Project fund Coordinator. Her international background includes consultancies for USAID funded project, notably in Guinea/Conakry and her position as Regional Finance Officer for WaterAid in London, UK during which she provided financial and management technical assistance to the Management team of several country programmes including Tanzania, Ethiopia and Uganda. Princia Ratrimo holds a Master degree in Finance and Accounting from the Institut National des Sciences Comptables et de l’Administration d’Entreprises (INSCAE), a leading Business School in Madagascar.