Curriculum Vitae

Sekar Fajar Lestari

Sekar Fajar Lestari

Kota Bandung
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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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Published a paper “Dimensionality and Geoelectric Strike Analysis  Of 2D Magnetotelluric Modeling in Geothermal Area XYZ”

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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Subsurface structural mapping using correlation of gravity modeling and geological study of Tuban Karst area, East Java, Indonesia

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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Best poster in International Conference on Upstream Energy Technology and Digitalization

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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Published a paper Published a paper entitled “Analisis Pengaruh Substitusi CO2 dan Brine   pada Kecepatan Seismik Menggunakan Persamaan Gassmann Berbasis MATLAB”
Hard Skills:
Data Analysis
Python
Desain grafis (Adobe Illustrator, Canva)
Microsoft Office (Word, Excel)

Soft Skills:
Kepemimpinan
Manajemen waktu
Pemikiran kritis
Multitasking