5th Geological Conference

our directors

Ann Ramsook

BHP Billiton

Ann Ramsook is a local geologist with 12 years’ experience in the oil and gas industry. She has a BSc in Petroleum Geoscience from UWI, St Augustine and an MSc in Basin Evolution and Dynamics from Royal Holloway, University of London.  She has worked at Petrotrin, Trinity Exploration and Production, BP Trinidad and Tobago (BPTT) and is currently employed at BHP. Ann has been involved with the GSTT for many years and most recently sat on the steering committee for the planning and execution of the 6th Geological Conference.

Sushma Chatelal

Shell Trinidad

Sushma is an Explorer with over 15 years’ experience in the Oil & Gas Industry both locally and abroad. She is a graduate of the University of Aberdeen in Petroleum Geoscience. Ms. Chatelal has served the Geoscience community via the GSTT in several different capacities over the years


Shell Trinidad

Vishram is and experienced Geophysicist with over 25 years’ experience in the Oil & Gas Industry.  He is a graduate of the UWI and Andrews University. Vishram has served the Geoscience community via the GSTT in several different capacities over the years.


Repsol Angostura

Gabriella studied Geology in the University of West Indies in Mona Campus, Jamaica and went on to work at the Ministry of Energy for five years. After working in the Resource Management Division and being part of several bid rounds, she pursued her masters in Oil and Gas Exploration and Production at the Centro Superior de Formacion de Repsol and Heriot Watt University. She graduated at the top of her class at CSFR (Repsol), after which she began working at Repsol as a Development Geologist in 2010 in the TSP fields and the JV with BPTT. She is currently pursuing her MBA with the Heriott Watt University. Throughout her career, she took up several active roles in the GSTT Executive serving multiple times as Director and Treasurer as well as serving on the Steering Committee of GSTT’s Geological Conferences in 2007 and 2012.

Stefon Harrypersad




Stefon Harrypersad graduated from the University of the West-Indies, Mona Campus, Jamaica, in 2016 with a BSc. in Geology and Geography with first-class honours. He is currently employed at BioSTRATIGRAPHIC Associated (Trinidad) Limited, as a Geologist/ Laboratory Manager as the company restructures and diversifies. He has been actively involved in the GSTT for the past three years, always making the time to participate in technical talks, seminars or field trips. Over the past year, he have been serving on the publications committee, as an editor of the quarterly magazine of the GSTT, the HAMMER. Mr. Harrypersad presented a technical session on the Retrench Sandstones of the Oropouche Oilfield, and co-presented a geological poster at the 6th Conference of the GSTT.

Helena Inniss



Helena Inniss was employed at the Ministry of Energy and Energy Affairs of Trinidad and Tobago from 1982 to 2011. While at the Ministry she worked initially as a staff geologist then senior geologist. She was involved in monitoring oil company operations and contributing to basin analysis of the hydrocarbon producing sub-basins in Trinidad and Tobago. Helena rose to become Director of Minerals and subsequently Director of Upstream Petroleum Resource Management. She and her team were responsible for ensuring the sustainability of the upstream petroleum industry. The team supervised several successful acreage licensing bid rounds. Since leaving the Ministry, Helena has consulted for a number of entities including the Government of Grenada and French Guyana and appeared as an expert witness for the Clico Energy Group. She has held the post of Vice President of the GSTT on two occasions and President in 2011. Even though not on the executive she has been active in assisting the Society in the execution of its mandate. 

Hasley Vincent



Hasley Vincent is currently an appraisal geologist at BPTT. He has been a professional geologist for
over 18 years. During his career he has been involved in a variety of projects including, but not
limited to, regional basin analyses, hydrocarbon play prospecting, cross border negotiations, outcrop
scale studies and environmental assessments. He has been an active member of the Geological
Society for the duration of his professional career where he served in the capacity of treasurer,
technical coordinator, convener, field trip leader, and other posts. Hasley holds a PhD degree in
sedimentology from Dalhousie University, Canada, and an MSc degree in petroleum geosciences
from Imperial College, London UK. He is married to Wendy Chadee-Vincent and is the proud father of
Sidney and Kelsey.

Leon Erriah


Shell Trinidad

Geologist with 12 years’ experience across multiple international assets including Australia, North Sea (UK), Trinidad and Brazil. Roles have included both technical and team leadership, extending across exploration and development. Main areas of expertise include   exploration/development well delivery, reservoir modelling and also unconventional geology. Important drivers include leadership, strong technical focus and collaboration within multi -disciplinary teams. Leon is currently in a broadening role as a Developments Business Lead at Shell focused on mid-term and long term developments across Trinidad

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Working hours

Monday- Friday 8:00 AM - 4:00 PM

Company's Address

UTT Building, Esperanza Road Brechin Castle, Couva Trinidad, The Republic of Trinidad & Tobago

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