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The Senior Geologist reports directly to the Manager, Geology and is responsible for leading geological studies and 3D geological modelling across the full exploration and production cycle. This includes integrating subsurface and production data to develop comprehensive geological models that support optimal well placement for exploration, appraisal, and development. Strong expertise in geological modelling is essential for effective collaboration within a multidisciplinary technical team. The role also involves managing subsurface projects, reserves, production forecasts, and exploration activities to maximize economic recovery and asset value.KEY ACCOUNTABILITIES

• Conduct geological assessments and studies for new ventures, exploration, and mature field opportunities.
• Build and maintain 3D static reservoir models integrating various subsurface and production data to accurately represent reservoir architecture and hydrocarbon volumes.
• Maintain comprehensive field-scale well correlations to define reservoir flow units, connectivity, and continuity for mapping and modelling purposes.
• Integrate all relevant subsurface data (e.g., stratigraphy, petrophysics, pressure, seismic) into reservoir model construction.
• Conduct pre-drill subsurface risk assessments, generate volumetrics, and prioritize leads and prospects.
• Lead geoscience efforts within integrated teams, working closely with reservoir engineers, petrophysicists, and production technologists.
• Prepare well proposals and formation evaluation programs to meet reservoir characterization needs.
• Support drilling operations with geological input and real-time monitoring in collaboration with operations and wellsite geologists.
• Coordinate with drilling teams to identify and mitigate geohazards and ensure safe, efficient drilling campaigns.
• Contribute geological input to Field Development Plans (FDPs).
• Perform deterministic and probabilistic volumetric assessments for reserves reporting and audits.
• Plan and oversee geological lab analyses of rock and fluid samples according to industry standards.
• Ensure all reports, presentations, and technical documentation are of high quality and delivered on time.
• Participate in data rooms, analyse subsurface data, and provide recommendations on new opportunities.
• Mentor and coach junior geologists to support their professional growth.
  
  

• Bachelor’s degree in Geology, Geoscience, Earth Sciences, or an equivalent qualification from a recognized university or academic institution.
• 15–20 years of experience in geoscience and petroleum engineering within the oil and gas industry, preferably with an operator.
• Strong background in geological interpretation and modelling methodologies.
• Minimum 5 years of experience building 3D geocellular static reservoir models using Petrel or TNav.
• Skilled in geostatistics, uncertainty analysis, and preparing volumetric reports for hydrocarbon resource estimation.
• Experience working with clastic depositional systems and integrating subsurface data (including seismic). Knowledge of carbonate systems is a plus.
• Familiar with geological settings in the Malay Basin or Sabah.
• Proficient in interpreting geophysical data and experienced with offshore drilling operations, including wellsite duties and log analysis.
• Knowledgeable in technical review processes and able to contribute to FDP, FFR, or similar evaluations.
• Effective team player in multidisciplinary environments with diverse backgrounds.
• Strong communication, presentation, and interpersonal skills.
• Self-driven and able to work independently with minimal supervision.
• Registered with the Board of Geologists (BOG), Malaysia.
• PETRONAS Reserves & Resources Management System (PRrMS) certification for reserves reporting.

• Seniority level Mid-Senior level

• Employment type Full-time

• Job function Research, Analyst, and Information Technology
• Industries Oil and Gas

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Senior Geologist Posted On : August 12, 2025
Location : Kuala Lumpur
Job Function : Subsurface
Employment Type : Permanent

The Senior Geologist reports directly to the Manager, Geology and is responsible for leading geological studies and 3D geological modelling across the full exploration and production cycle. This includes integrating subsurface and production data to develop comprehensive geological models that support optimal well placement for exploration, appraisal, and development. Strong expertise in geological modelling is essential for effective collaboration within a multidisciplinary technical team. The role also involves managing subsurface projects, reserves, production forecasts, and exploration activities to maximize economic recovery and asset value.

KEY ACCOUNTABILITIES

• Conduct geological assessments and studies for new ventures, exploration, and mature field opportunities.
• Build and maintain 3D static reservoir models integrating various subsurface and production data to accurately represent reservoir architecture and hydrocarbon volumes.
• Maintain comprehensive field-scale well correlations to define reservoir flow units, connectivity, and continuity for mapping and modelling purposes.
• Integrate all relevant subsurface data (e.g., stratigraphy, petrophysics, pressure, seismic) into reservoir model construction.
• Conduct pre-drill subsurface risk assessments, generate volumetrics, and prioritize leads and prospects.
• Lead geoscience efforts within integrated teams, working closely with reservoir engineers, petrophysicists, and production technologists.
• Prepare well proposals and formation evaluation programs to meet reservoir characterization needs.
• Support drilling operations with geological input and real-time monitoring in collaboration with operations and wellsite geologists.
• Coordinate with drilling teams to identify and mitigate geohazards and ensure safe, efficient drilling campaigns.
• Contribute geological input to Field Development Plans (FDPs).
• Perform deterministic and probabilistic volumetric assessments for reserves reporting and audits.
• Plan and oversee geological lab analyses of rock and fluid samples according to industry standards.
• Ensure all reports, presentations, and technical documentation are of high quality and delivered on time.
• Participate in data rooms, analyse subsurface data, and provide recommendations on new opportunities.
• Mentor and coach junior geologists to support their professional growth.

REQUIREMENTS AND QUALIFICATIONS

• Bachelor’s degree in Geology, Geoscience, Earth Sciences, or an equivalent qualification from a recognized university or academic institution.
• 15–20 years of experience in geoscience and petroleum engineering within the oil and gas industry, preferably with an operator.
• Strong background in geological interpretation and modelling methodologies.
• Minimum 5 years of experience building 3D geocellular static reservoir models using Petrel or TNav.
• Skilled in geostatistics, uncertainty analysis, and preparing volumetric reports for hydrocarbon resource estimation.
• Experience working with clastic depositional systems and integrating subsurface data (including seismic). Knowledge of carbonate systems is a plus.
• Familiar with geological settings in the Malay Basin or Sabah.
• Proficient in interpreting geophysical data and experienced with offshore drilling operations, including wellsite duties and log analysis.
• Knowledgeable in technical review processes and able to contribute to FDP, FFR, or similar evaluations.
• Effective team player in multidisciplinary environments with diverse backgrounds.
• Strong communication, presentation, and interpersonal skills.
• Self-driven and able to work independently with minimal supervision.
• Registered with the Board of Geologists (BOG), Malaysia.
• PETRONAS Reserves & Resources Management System (PRrMS) certification for reserves reporting.

• Focal geologist for BD-4 Appraisal well including the workscope of preparing the SOR, GP Survey, geological assessment for shallow reservoir, external lead for MPM/REX reviews, well proposal preparation and spud.
• Focal geologist for ADP update including producing the executive summary, PM 302/PM325 Exploration background, remaining Leads and Portfolio and integrated development planning.
• Focal work on the NMB Western Area Development in 2022, for seismic interpretation task.
• Regional geological and geophysical studies, acreage and prospect maturation is carried out to identify basins and plays to support bidding in exploration bid rounds and farm-in and acquisition initiatives.
• Identification and mapping of leads and prospects for exploration drilling opportunities, including quantification of play & prospect risks, volumetric assessments and economic viability.
• Planning and execution of exploration and appraisal drilling.

Qualifications:

• Bachelor or Masters Degree in Geosciences or Geology or equivalent.
• Minimum 10 years experienced in similar scope within Malay Basin with GHA application work an advantage.
• Experienced Petrel and GeoX software user.
• Effective oral and written communication skills in English.
• Registered geologist with Board of Geologist Malaysia (Lembaga Ahli Geologi Malaysia).

Interested applicants, please kindly send cv to

We’re sourcing for qualified candidates to fill the following positions:

Wellsite Geologist

1. Certificate in Geosciences or equivalent or acceptable working experience in exploration.
2. 10 years’ experience as wellsite and/or operations geologist.
3. 5 – 7 years’ experience as wellsite geologist of which all must have occurred within the past 10 years.
4. Candidate must have experience in sitting offshore Malaysia wells within the past five (5) years.
5. Experience and knowledge of drilling operations (HPHT experience is a plus).
6. Experience in supervision and quality control (QC) of wireline formation pressure testing operations, including sampling and fluid gradient determination.
7. Experience and knowledge of drilling operations specific for Managed Pressure Drilling (MPD).
8. Confirmed SE Asian based, preferably Malaysian-based.
9. Registered with the Malaysian Board of Geologists. (Require copy of certificate).

Operations Geologist

1. Certificate in Geosciences or equivalent or acceptable working experience in exploration.
2. 10 years’ experience as operations and/or wellsite geologist.
3. 5 – 7 years’ experience supervising operations in offshore Malaysia of which all must have occurred within the past 10 years.
4. Have experience and knowledge of drilling operations specific for pore pressure/frac gradient analysis, determination of safe MW window for drilling and HPHT.
5. Be familiar with, and be able to provide expert recommendations and advice, on the latest technologies offered by the relevant service companies for Wireline, LWD and Mudlogging to cost-effectively meet the COMPANY’s Geological Objectives.
6. Have experience in supervising LWD, formation pressure testing while drilling (FPWD) program in thin bedded reservoirs in high angle well and/or horizontal wells.
7. Be able to provide real-time stratigraphic correlations for wellbore trajectory assessments and optimization, casing point selection, and core point determinations.
8. Experience as operations geologist in deep water drilling is a plus.
9. Registered with the Malaysian Board of Geologists. (Require copy of certificate)

Interested candidates may submit your updated CV to with the subject of (Application for Position). Feel free to share this post with your network.

Closing Date: 5th February 2025.

Only qualified candidates will be contacted.

We’re sourcing for qualified candidates to fill the following positions:

Wellsite Geologist

• At least 12 years in oil & gas industry with min. 10 years’ offshore experience (combined mudlogging and WSG experience). Must have a min. of 4 years’ experience as a WSG. The last WSG stint must be within the last 2 years.
• Bachelor’s degree in Geology / Petroleum Engineering.
• Experienced working in Sabah waters / Malay Basin for min. of 5 years.
• To be based in Malaysia – in case urgent mobilization required.
• Prior experience working in PM3 Commercial Arrangement Area (CAA) PSC and/or Kinabalu & North Sabah.
• Valid BOSIET with CA-EBS (approved Opito and accepted by MPM).
• Valid Medical Certificate approved by MPM AME.
• Experienced in horizontal, highly deviated, conventional coring, wireline logging, ERD wells.
• Have familiarity and able to generate logs with Gravitas.

Operation Geologist

• Possess at least ten (10) years of working experience in geological wellsite operations and formation evaluation, acquired through roles such as wellsite geologist, mud-logger, LWD engineer, Wireline Engineer, with at least five years dedicated to Operations Geology.
• Demonstrated previous experience in clastics drilling and evaluation, particularly in shallow waters, highly deviated wells, and horizontal wells.
• Proven track record in handling Abnormal Pressure Drilling and adeptness in concepts related to Pore Pressure Predictions.
• Previous involvement in Managed Pressure Drilling (MPD) operations and evaluation is essential.
• To be based in Malaysia.
• Prior experience working in PM3 Commercial Arrangement Area (CAA) PSC and North Sabah.
• Prior experienced in presenting Post-Drilling Review (PDR) to stakeholders and generating PDR report.

Interested candidates may submit your Updated CV to with the subject of (Application for Position). Feel free to share this post with your network.

Closing Date: 8 April 2025.

Only qualified candidates will be contacted.