Curriculum Vitae

Sekar Fajar Lestari
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Geophysics Engineering graduate with internship experience as a Geothermal Engineer and Final Project Researcher. I possess a strong foundation in geology and expertise in acquisition, processing, modeling, and interpretation of gravity, electrical resistivity, magnetotelluric,data to assess the presence, geological structure controls, and geometry of geothermal prospects. As a continuously developing professional, I am also proficient in using Python to enhance the quality and efficiency of geophysical data processing.
Sedang berjalan
Institut Teknologi Bandung
S2 • Teknik Geofisika • IPK 3.66
Agustus 2023
Institut Teknologi Sepuluh Nopember
S1 • Teknik Geofisika • IPK 3.66
Juni 2025 - Sekarang
Research Project Assistant of LUSI Geohazard
PT Pertamina Hulu Energi & Institut Teknologi Bandung • Project Base
• Designed a survey layout of 60 magnetotelluric (MT) and audio-magnetotelluric (AMT) stations in the LUSI area to
investigate the potential presence of a mud volcano.
Juni 2025 - Sekarang
Integrated Geological Mapping and Geophysical Field Survey
Institut Teknologi Bandung • Project Base
• Led a team in geological mapping of a 2 x 2 km2 melange complex area, producing topographical, geological, geomorphological, stratigraphic maps, and a geological cross-section using QGIS and Adobe Illustrator.
• Conducted acquisition and processing of geophysical data (gravity, magnetic, VES, and magnetotelluric), resulting in four subsurface models consistent with regional geological interpretations.
• Integrated geological and geophysical data to interpret subsurface lithology distribution, presented in a final technical report, awarded with a final evaluation grade of A.
Oktober 2023 - Desember 2023
Research Project Assistant of Hydrogeological Study for Landfill Groundwater
Institut Teknologi Sepuluh Nopember • Project Base
• Performed well correlation analysis by integrating geological data and borehole data to obtain detailed descriptions of each well.
• Conducted 2D resistivity model using Res2DInv and interpreted the results to understand lithology distributions, providing a comprehensive view of subsurface conditions.
• Utilized RockWorks software to create diagram fences for 2D resistivity models, geological models, and hydrogeology models in the study area, enhancing understanding of lithology distributions.
• Executed solid research, identifying aquifer structures, groundwater flow patterns, and other critical factors, contributing to a comprehensive analysis of the subsurface environment.
Februari 2023 - Juni 2023
Teaching Assistant of Electromagnetic Exploration
Institut Teknologi Sepuluh Nopember • Project Base
• Assisted in updating course content by integrating current industry practices and emerging geophysical technologies to keep the curriculum aligned with field advancements.
• Delivered both theoretical and hands-on instruction in geophysical methods such as Magnetotelluric (MT), Very Low Frequency (VLF), and Ground Penetrating Radar (GPR) to a class of 80 students.
• Designed and facilitated structured learning activities, including assignments, quizzes, group projects, and final
evaluations to support active learning.
Oktober 2022 - Juni 2023
Final Project Research of Magnetotelluric Modeling for Geothermal Exploration
PT Tunggal Buana Utama • Magang
• Conducted comprehensive final project research, titled “Phase Tensor Analysis of 2D Magnetotelluric Modeling in
Geothermal Area”, delivering accurate 2D resistivity models that supported the identification of geothermal prospect areas.
• Utilized ArcGIS generating geological maps, including line-specific geology profiles, and designed MT acquisition maps to enhance geological insights.
• Performed advanced phase tensor analysis using MTPy (Python) to assess MT dimensionality and geoelectric strike, reducing interpretation error by 3%.
Agustus 2022 - September 2022
Geophysical Field Survey (Integrated Methods)
Institut Teknologi Sepuluh Nopember • Project Base
• Collaborated with a multidisciplinary team of 6 students to acquised and quality controlled subsurface data such as Magnetotelluric, Very Low Frequency, Vertical Electrical Sounding, Geoelectric 2D, Active Seismic, Gravity, Magnetic, and Microtremor methods in a Karst Area.
• Conducted geophysical data processing techniques to the acquired datasets and skillfully interpreted integrated geophysics cross-sections using WinGLink, MATLAB, IP2WIN, Res2Dinv, Tesseral, Oasis Montaj, and Surfer.
• Utilized geological principles and validated surface manifestations to successfully identify and delineate the continuity of the groundwater basin in the Karst Area of Tuban, East Java.
Juni 2022 - Juli 2022
Geothermal Engineer Intern
PT PLN Gas & Geothermal • Magang
• Improved data quality by conducting Magnetotelluric QC and reducing interpretation errors by 1%, enhancing the reliability of subsurface models.
• Integrated MT data with well logs using WinGLink and GIS tools to validate the Ulumbu Geothermal Field model and refine exploration insights.
• Led spatial analysis and acquisition planning, mapping geothermal in ArcGIS and designing MT survey strategies to optimize field coverage.
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Januari 2022 - Januari 2023
Sekretaris Umum
Himpunan Mahasiswa Teknik Geofisika ITS • Organisasi
• Implemented innovative practices within the association using Microsoft Excel, resulting in a commendable 90% success rate in optimizing the efficiency of secretarial tasks, encompassing correspondence, proposal development, and financial
reporting.
• Provided invaluable guidance and coaching to 5 division secretaries, resulting in a substantial enhancement of skills
related to the preparation of letters and documents, by created an administrative training session.
• Collaborated with other organization members to streamline administrative processes, achieving an impressive 97% of administration goals achieved.
• Facilitated effective communication channels through proactive coordination with the bureaucratic framework,
maintained a responsive secretarial system.
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Maret 2021 - Maret 2022
Finance Staff
Himpunan Mahasiswa Ahli Geofisika • Organisasi
• Initiated the successful launch of HAGI ITS SC merchandise, achieving a 25% profit margin—exceeding the target by 100%—through engaging creative strategies and Instagram Ads.
• Directed the Wisuda Bucket PO sales during the graduation season, securing a 33% profit margin with effective cost management.
• Conduct pre- and post– event evaluations and report on outcomes event, resulting in positive feedback and high attendee satisfaction for 89%.
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September 2024
Carbon Management & Understanding The Digital Tools
Envana, Halliburton, and Institut Teknologi Bandung • -
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Desember 2023
Oil & Gas Industry Operations and Markets
Duke University • -
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Oktober 2023
TOEFL ITP
Educational Testing Service (ETS) • -
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Juni 2024
Published a paper “Dimensionality and Geoelectric Strike Analysis Of 2D Magnetotelluric Modeling in Geothermal Area XYZ”
IOP Science • -
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Juni 2024
Subsurface structural mapping using correlation of gravity modeling and geological study of Tuban Karst area, East Java, Indonesia
AIP Publishing • -
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September 2023
Paper Presenter International Conference on Geological Engineering and Geosciences
Universitas Gajah Mada • -
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Desember 2022
Best poster in International Conference on Upstream Energy Technology and Digitalization
Universitas Pertamina • -
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April 2019
Published a paper Published a paper entitled “Analisis Pengaruh Substitusi CO2 dan Brine pada Kecepatan Seismik Menggunakan Persamaan Gassmann Berbasis MATLAB”
Jurnal GEOCELEBES • -
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