Executive & Legal Team

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Operations Manager, Geothermal Project Manager

John began his career as a wireline field engineer with Schlumberger and progressed throughout the North America and Australasia geo-markets. This work included onshore, offshore, deepwater, mineral, and geothermal exploration. He later moved to New Zealand to pursue the geothermal industry, accepting a position as Well Services Manager with a geothermal service company and contributed to the success of many different projects within the upstream geothermal sector. These projects include wireline and slickine logging, well intervention scale removal using slickline and capillary tubing, design/ commissioning of anti-scalant systems in geothermal wells, well testing and analysis, and well intervention training. John started JRG Energy in 2013 and has worked in several locations throughout the world including Africa, Mexico, Armenia, Caribbean, New Zealand, Philippines, Indonesia, Malaysia, and the US. 



Business Development, Geothermal Project Manager

Patrick has 15 years of marketing, brand management, communications and sales enablement experience, with over 12 years specific to the geothermal industry. Patrick has spent his career helping energy service companies redefine their brand within the energy sector, while positioning and promoting geothermal at every opportunity.  In doing so, Patrick has worked with dozens of energy service companies to implement proven strategic marketing initiatives (brand management, web development, advertising campaigns, market research and social media management, etc.) In addition, Patrick's been a part of developing sales tools that leverage the marketing initiatives to position companies like JRG Energy for success. He has been an integral part of the JRG team since 2015.



Legal Adviser, Renewable Energy Expert

Sebastián Saá’s practice focuses on Energy and Natural Resources matters, particularly on government contracting, international negotiations, and mergers and acquisitions. He has broad experience in taxes and tax structuring, as well as energy project financing.  Sebastián Saá was a partner in a prestigious Ecuadorian firm, where he led the Energy and Natural Resources area, as well as the New Businesses area.  He handled various local and international clients in oil and gas industry and renewable energy. Sebastian has obtained accreditation in negotiations, and centers much of his practice on handling complex negotiations.  He has also represented diverse public sector energy entities, which has provided him a comprehensive vision of the business. Sebastian holds an LLM from George Washington University and a Graduate Diploma in Energy and Natural Resources from University of Melbourne. Sebastian has been part of the JRG Energy team since 2016.

Geothermal & Projects Team


    Geologist, Geothermal Project Manager

    Jason began his career in mineral exploration (Cu-Au) in the Caribbean before moving to Central America where he worked in the Oil & Gas and Water Industries. His responsibilities included due diligence, geological field work and reporting, environmental assessments, GIS mapping, teaching and training.  He later entered the geothermal industry as a Data Engineer/Logging Geologist and Consultant, gaining experience in geothermal fields in Central America and the USA. In addition, Jason has participated in the United Nations Geothermal Training Programme in El Salvador and has written & published numerous technical and non-technical geothermal articles.


    Geoscientist, Geothermal Project Manager

    Anna is a geothermal geoscientist with 12 years of international experience in geothermal exploration and development. She has worked on high enthalpy geothermal projects globally – including Latin America and the Caribbean, Indonesia, Philippines, New Zealand, East Africa and the USA.  Anna specializes in geology and hydrothermal alteration, 3D modeling in Leapfrog, geoscience data integration, conceptual model development, resource capacity assessments, well targeting, well planning, and well site geology. In addition, she has provided technical expertise in support of national and regional policy, regulatory, and market assessments as well as performed technical due diligence reviews for geothermal asset acquisition. Anna holds an MSc. in Geology from Michigan Technological University (USA) and is fluent in English and Spanish. Anna joined the JRG team in 2020.


    Project Engineer


    Milly has seven years of experience within the geothermal industry. Her strengths are based around project planning, execution, and delivery of a range of geothermal infrastructure. She has been intimately involved with numerous steamfield projects along with power stations and geothermal water treatment systems. With a background in both engineering and management, she has a unique perspective of project planning and development within the industry.


    Geothermal Project Manager


    Originally from Ethiopia, Kifle made his move to New Zealand in 1982 through a post-graduate program in Geothermal Energy Technology, at the University of Auckland. Since then, he has been an integral member of the NZ geothermal community and successfully delivering projects throughout the world. Kifle has attended, participated and instructed a number workshops, conferences, short term trainings in international and local conferences in geothermal development cases in geosciences, reservoir conditions and drilling technology and operations since early 1990s. In positions as Geothermal Specialist, Subsurface Geothermal Manager, Deputy Director, Chief Geoscientist, Principal Geoscientist, Chief Wellsite Geologist, Exploration and Development Manager, Researcher, Academician provided extensive experiences in conducting the technical consulting and advisory services for geothermal worldwide. Kifle is fluent in Tigrinya, Amharic, English and basic French.


    Business Development, Project Manager

    Suherman has nearly 20 years’ experience in geothermal, oil and gas, miiningcased-hole and open-hole wireline services in New Zealand and Indonesia, 3 years’ experience in oil & gas cased-hole wireline logging and perforation in Indonesia & Malaysia, 1-year experience in coal mining wireline logging in very remote area in Indonesia. 1-year experience in Geothermal well testing.


    He assisted and led the start-up MBCentury wireline business in Indonesia in 2006 led the start-up of Tiger Energy Services business in Indonesia in 2009 where he focused on wireline, slickline, and capillary services.


    Suherman is familiar with the tendering process for all of Indonesian geothermal clients covering technical and commercial aspects, including the Export and Import of the goods and understanding the process.  He has the ability to manage operations to fulfill client needs and ensure the safety of the operations for the people and equipment. Suherman joined the JRG team in 2020.

Upstream Geothermal Services Team


    Well Test Engineer / Reservoir Technician

    Hamish is a well engineer and geothermal site leader with 13 years experience. He started his career as a wireline engineer in the Australasian oil and gas markets and later transitioned to Australian based oil and gas operating companies where he worked as a Well Engineer.  Hamish has experience planning and executing upstream drilling and intervention operations as well as extensive experience as a Company Man supervising field intervention operations. Hamish joined JRG is 2020 and holds a BSc in Chemistry and PGDip in Petroleum Engineering from UNSW.


    Well Test Engineer / Reservoir Technician

    Andrew has extensive site and office experience within the geothermal industry. He has 31 years of industry experience and 12 years of geothermal experience. Having worked for both service companies and power production companies, Andrew has gained a wide range of experience and skills.  These skills include coordination and supervision of well testing, chemical inhibition system designs, wireline unit engineering, mechanical maintenance and installation, and well services training. Andrew has trained individuals throughout the Philippines, New Zealand, PNG and Australia.  


    Wireline and Completions Engineer

    Kidane began his career as a wireline field engineer in the oil and gas industry throughout the Australasian and North American geo-markets. He later moved to New Zealand to pursue his career in the geothermal industry, accepting a position as Wireline Engineering Manager managing a wireline, slickline, and capillary services team, and contributed to the success of many other projects within the upstream geothermal sector. These projects include: wireline and slickine logging, well intervention scale removal. capillary tubing, DTS systems, and more. He joined JRG Energy in 2016 as a well services supervisor on multiple projects across the globe. Kidane holds a ME (Hons) in Chemical and Materials Engineering.


    Well Intervention Engineer

    Duncan began his career as an assistant driller in the oil/gas and geothermal industry working on various drilling rigs throughout Australia and New Zealand.  He later started working as a wireline, slickline, and capillary services engineer. He is now working with JRG Energy as a well intervention engineer/Projects engineer on multiple projects across the globe. Duncan has over 14 years of experience with practical, hands-on experience operating upstream equipment. He now resides in Germany and will be a key attribute to any site works or sub-contractor audits.


    Drilling Supervisor

    Celal is a skilled Drilling Supervisor with 13 years of International geothermal drilling experience (Iraq, Georgia, Indonesia, Singapore, Tunisia, Malaysia) in performing Drilling Engineering and Well Site Drilling Supervisor positions. To date, he has supervised and worked on more than 80 wells.  Celal holds a B.S. in Petroleum and Natural Gas Engineering and over a dozen drilling certificates such as IWCF Surface BOP Stack Well Control and MODUSPEC Land Rig and Jack-up Rig Inspection Workshop.


    Well Intervention Engineer

    Tony began his career as a machinist, designing and manufacturing downhole wireline tools for the geothermal industry. He later joined a well services company as a wireline/slickline supervisor for the geothermal industry. Tony is prolific in wireline/slickline surveys, slickline scale removal, fishing, capillary tubing, coil tubing, wireline plugs/packers and training of all the aforementioned services.

Solar Services Team


    Solar Energy Consultant

    Yariv has 14 years of experience in the solar energy industry, consulting on solar technologies. Gaining office and site experience, Yariv overseen over 6,600m2 of solar panels installations, annually producing 3.2GW of free energy and reducing 814 tonnes of CO2 every year. Yariv’s educational background is in renewable energy sciences, robotics & automation, economics, management and marketing. Through his passion for renewable energy he has kept abreast of technology advances to ensure the creation of smarter and more efficient energy systems that meet the highest environmental construction standards.


    Solar Energy Consultant

    Navratan has an abundance of knowledge in both renewables energy engineering markets as well as business management and ventures. He is known as an expert in his field by his peers and has cross-functional experience of over 27 years in Solar and Wind energy, electrical and IT domains specifically in functions like strategy, marketing, business development & diversification, technology, customer service, and quality. Navratan is currently listed as a Solar technology commercial and strategic consultant in renewable energy, corporate training, and creating new businesses for current and existing clients. His tasks include due diligence, LIE support – contractual, legal, commercial, technical, and enhancing business propositions. He has completed a Master's degree in both Engineering and Business Management. Navratan has worked in many different countries covering an array of disciplines and projects including Solar pumps, residential solar initiatives, agricultural solar and wind projects, solar telecom towers, PV projects, wind turbine installation, to name a few.


TEL: +64 21 733022

© 2020 by JRG Energy Consultants

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