PT. Thermochem Indonesia has laboratories and a base for heavy well test equipment in Bandung, West Java, about 130km from Jakarta. These facilities allow for analysis of samples that cannot be easily shipped back to the main USA lab, and for rapid response in field testing requirements by our customers in the Asia-Pacific region. This base also maintains a comprehensive inventory of test equipment, specialized instrumentation, wellbore logging tools, safety gear, and spare parts. The executive offices for PT. Thermochem Indonesia are in Jakarta, and a satellite office with lab and field equipment is in Taratung, North Sumatra.
Geothermal
Power Generation
Oil and Gas
Thermochem’s Indonesia-based team is comprised of highly qualified scientists and engineers with project experience including well testing, chemical sampling and testing services at well sites, drilling rigs, power plants, and remote exploration areas. Services include production and injection well testing, TFT® measurements, power plant performance tests, pilot plant testing and greenfield exploration. The full-time staff includes engineers, chemists, geochemists and geologists with specialties in chemical engineering, analytical chemistry, geochemistry, well testing and logging. Meet the leadership team at Thermochem Indonesia:
Miranti Kusuma brings an economics and management perspective to Thermochem Indonesia with more than 20 years of experience with local and international companies. She has been with Thermochem since 1998. In 2006, Miranti became Director of PT Thermochem Indonesia and continues to lead the company from this role. Miranti is passionate about both the geothermal and oil and gas sectors and her role at Thermochem allows her to contribute to both. She leads projects all across Indonesia from Aceh to Papua, and throughout Southeast Asia. Miranti leverages her leadership, project management and business development skills to add value to the Thermochem Indonesia team.
Miranti can be contacted at Miranti@thermochem.co.id
Jeremi is a geochemist with a background in Geological Engineering from the University of Pertamina, bringing over four years of experience in the geothermal industry across several service companies, including Thermochem. His work spans from exploration geochemistry to production testing and applied geochemistry in power plant operations, complemented by involvement in academic research. In 2026, he further expanded his expertise through the Geothermal Energy Project Management program under the Manaaki Scholarship in New Zealand. Currently serving as a Geochemist Supervisor at Thermochem, Jeremi has contributed to a wide range of projects—from early-stage exploration, production, and due diligence reviews—across geothermal fields in Indonesia and internationally, including Taiwan and Thailand.
Jeremi can be contacted at jeremi@thermochem.co.id
Agung earned a Master’s degree in Geothermal Exploration from Institut Teknologi Bandung (ITB) through an accelerated fast-track program, following completion of his Bachelor’s degree in Geology at ITB. He has nearly two years of professional experience in geothermal geological and geochemical exploration. His field experience includes geochemical sampling of geothermal manifestations in several prospect areas, including Patuha, Samosir, Dolok Marawa, Banjarnegara, Sungai Penuh, etc. In addition, he has participated in TFT® programs in several geothermal fields, such as Ijen, Rantau Dedap, Ulubelu, and Patuha. Beyond field-based exploration, Agung has been involved in multiple geothermal geochemical interpretation projects in Indonesia. His technical expertise encompasses geological mapping, petrographic analysis, hydrogeological assessment, conceptual model development, and 3D geological modeling using Leapfrog.
Agung can be contacted at agung@thermochem.co.id
Doddy is a Mechanical Engineer from Institut Teknologi Bandung (ITB). He has 14 years of experience with an international integrated oilfield services company and has worked in five countries. He was an Operations Manager for a leading international Geothermal service company in high temperature wireline logging, covering Indonesia and the Philippines for four years. His clients were Geothermal Operators in Gunung Salak, Darajat, Kamojang, Ulubelu, Lahendong, Kerinci, Wayang Windu, Ulumbu and Sarulla fields in Indonesia, as well as Tiwi, Makban and Maibarara fields in the Philippines. He managed an IPM for well test operations at the SIL field, Sarulla, before the massive drilling program. He also spent two years as a Geothermal HSE Manager for an Indonesian wireline service and manufacturing company in Jakarta.
Doddy can be contacted at Doddy@thermochem.com.
Ali is an M.Sc in geothermal exploration from Institut Teknologi Bandung. Ali holds a B.S. degree in Chemistry from Indonesian University of Education. He has four years’ experience in the geothermal industry and academic research, as well as working as an instructor at Institut Teknologi Bandung. Ali has been with Geothermal Master Degree program of ITB as teaching assistant since October 2014. Ali has been with PT Thermochem Indonesia since November 2015 as a geochemist and field team leader. His responsibilities include interpreting geochemical data for thermal manifestations and production fields, reviewing data quality, planning, coordination, and reporting for all field operations. Ali also supervises the maintenance of all sampling equipment and instrument calibration. He has been involved in many exploration projects such as Sarulla-Pahae, Gunung Endut, Wayang Windu, Cisolok-Cisukarame, Patuha, Guci-Baturaden, Gunung Kembar, Gunung Talang, and Muaralaboh. He is also involved in TFT®, Reservoir Tracer Tests and Geochemistry projects at geothermal fields in Indonesia, such as Darajat, Lahendong, Sibayak, Sarulla, Rantau Dedap, Sorik Marapi, Patuha, Dieng and Ulubelu. He has international project experience at the Olkaria Geothermal field in Kenya, working as a field geochemist for full-field TFT® and geochemistry surveys at the Orpower field.
Ali can be contacted at Ali@thermochem.co.id.
Winahyu has a M.Eng in geothermal exploration and technology from Institut Teknologi Bandung. She has over 4 years’ experience in the geothermal industry and academic research. She has experience as a teaching assistant at Institut Teknologi Bandung which helped familiarize herself with geothermal data and interpretation. Winahyu joined PT Thermochem Indonesia in June 2014 and is responsible for interpreting geochemical data for both thermal manifestations and production data; to ensure and review data quality and to determine a solution to the problem. She has been involved with several Thermochem TFT® projects across many geothermal fields in Indonesia, including; Darajat, Salak, Lahendong, Sibayak, Sarulla, Rantau Dedap, and Ulubelu; as well as in Olkaria, Kenya.
Winahyu can be contacted at Winahyu@thermochem.com.
Claudio has an M.Sc. in geothermal exploration from Institut Teknologi Bandung (ITB). He is a Geochemist with four years of experience in the geothermal industry and research. Claudio is currently serving as a geochemist in Thermochem Indonesia where he is responsible for field well test operations and consulting services. He has been involved in several geochemical surveys in Indonesia with several geothermal companies and universities. He worked as an Instructor of Practical Geochemical Sampling and Data Analysis Star Energy Geothermal Darajat. He worked on the Ungaran Geochemical Exploration Project UPN “V” Yogyakarta with the responsibility of sampling gas and interpreting its Geothermal System. He Worked on 3D conceptual model development, exploration geochemistry for multiple geothermal fields such as Lahendong-Tompaso, Ciwidey, Jailolo, Sorik Marapi, Muaralaboh, etc. He has worked on several production fields for well test and tracer test such as Sarulla, Sorik Marapi, Muaralaboh, Rantu Dedap, Lumut Balai, Patuha, Darajat, Kamojang, Karaha, Dieng, Ijen. Claudio’s skills set in geochemistry and his working experience as an instructor assistant for Leapfrog 3D Modelling by Seequent make him an important figure in the training for geothermal master students ITB.
Claudio can be contacted at Claudio@thermochem.co.id.
Zahra earned a Bachelor degree in Science Chemistry from Institut Technology Bandung (ITB) Indonesia. She is a Chemist with twelve years’ experience in geothermal laboratories. Zahra has been responsible as a Laboratory Manager at Thermochem Indonesia for five years. She manages and supervises general coordination of analytical lab services performed by PT Thermochem Indonesia. She maintains and ensures all lab services meet the requirements of QA/QC objectives and reporting guidelines. She is also Quality Manager for ISO 17025 at Thermochem Indonesia.
Zahara can be contacted at Zahra@thermochem.co.id
Budy Nugraha is Thermochem Indonesia’s Marketing Manager with more than 10 years of experience in the Geothermal, and Oil and Gas Industries. Budy joined Thermochem in February 2012 as Marketing Manager. With Thermochem Indonesia, Budy has worked with customers such as Pertamina, Halliburton, Pertamina EP, PGE, Supreme Energy, SOL, Medco Energy, Hitay, etc. Budy has field and technical experience while brings additional value to Thermochem, as he can serve as a Technical Supervisor or Project Coordinator in the field as well.
Budy can be contacted at Budy@thermochem.co.id