ONGEZWA MDOYI
Westonaria
Summary
Geologist specializing in mineral exploration and mining operations across various environment involving Platinum, Gold, Copper & Zinc, Iron and manganese. Proficient in core logging, sampling, geological mapping, evaluation, grade control and overseeing drilling activities with a keen emphasis on QAQC, data accuracy, and HSE adherence. Dedicated to promoting safety, quality, and productivity throughout exploration and mining endeavors. Skilled in Microstation, Datamine, MineCad, Studio Mapper and with basic familiarity in Micromine and QGIS software, complemented by advanced proficiency in Microsoft Office tools.
Overview
6
6
years of professional experience
Work History
Production Geologist
South Deep Mine
07.2025 - Current
- Provide geological guidance to mining teams on reef identification, structural conditions, and ground safety.
- Conduct detailed underground structural mapping (faults, joints, veins, reef contacts), capturing dip, dip direction, and strike data.
- Plot geological data in 2D using MineCAD and update Mine Overseer (MO) plans.
- Develop and maintain 3D geological and structural models using Studio RM (Datamine) for operational planning and interpretation.
- Generate and distribute technical geological reports, communicating findings and recommendations to relevant stakeholders.
- Support survey teams by providing accurate structural interpretations for survey notes and panel development.
- Analyse geological conditions ahead of mining faces to assess structural impacts on planned excavations.
- Perform core logging, cover drilling, and infill drilling supervision, ensuring accurate geological data capture.
- Conduct sampling and borehole sign-offs, ensuring compliance with geological and QA/QC standards.
- Execute borehole desurveying and validate spatial accuracy of drilling data.
- Integrate drilling and mapping data into the geological model, ensuring continuous updates of both 2D and 3D datasets.
- Participate in pre-planning, planning, and scrutinising meetings to align geology with short- and medium-term mine plans.
Entry Level Geologist
Prieska Copper Zinc Mine
10.2023 - 07.2024
- Underground mapping and supervision of grade control, and channel sampling.
- Led sterilization RAB drilling on tailings site ensure proper planning, execution, performing chip logging, data capture, and quality assurance for geological data
- Coordinated sample dispatch to the laboratory, ensuring timely and accurate processing.
- Directed ROM stockpile management by tracking ore sources, monitoring stockpiling of waste and ore, and conducting sampling and QAQC for assay data.
- Acted as the site environmental compliance officer, executing and reporting on weekly environmental audits and ensure quality assurance to comply with audit standards.
- Managed data validation and QAQC processes, ensuring high standards of geological information
- Geology crew management the role includes allocating work, measuring performance, training staff, and maintaining discipline
- Use of Micromine and QGIS for georefrencing and digitizing maps
Geology Graduate
Assmang Exploration Project (Iron & Mn)
02.2022 - 04.2023
- Supervised drilling contractors, ensuring strict adherence to exploration plans and contract requirements.
- Conducted detailed logging and sampling for Percussion, Reverse Circulation, and Diamond Drill cores, coordinating laboratory dispatch of samples while following standard procedures.
- Assisted in developing strategic drilling plans, aligning with gravity, magnetic, and geological maps to target optimal exploration zones.
- Coordinated drilling data, verified contractor invoices, and ensured alignment with project budgets.
- Conducted QA/QC analysis, reinterpreted results, and evaluated data for accuracy.
- Monitored drilling operations including site assessments and site rehabilitation, to ensure compliance with safety and environmental regulations
- Manage data entry for logging and sample in Fusion database and update the database with the processed drilling information to ensure accurate and available data.
- Compliance with SAMREC Code
Geology Graduate
Two Rivers Platinum Mine
10.2020 - 01.2022
- Performed underground geological structural mapping. Monitored and assessed production rates and material quality to maintain efficient extraction standards.
- Plotted geological structures using MicroStation, maintaining precise records of geological data.
- Ensure all interpretations are verified before the Section Manager of Production Geology signs off for approval.
- Maintained and updated geological plans, ensuring accuracy and currency for mining operations.
- Compiled and analyzed geologic data to support grade optimization and enhance mining efficiency.
- Conducted structural and face mapping, generating reports on observed deviations to ensure corrective action is taken.
- Assist in planning underground drilling for both coverage and prospect areas to facilitate better decision making
- Conducted Early Entry Examinations, ensuring compliance with health and safety regulations.
- Conducting start-up, geological audits, and incident reporting to reinforce safety and procedural adherence.
Education
BSc Honor's - Geology
University of Fort Hare
12-2019
BSc - GIS & Geology
University of Fort Hare
12-2018
Matric -
Oscar Mpetha High
12-2015
Skills
- Data management and validation
- Team management and training
- Drill contractor supervision
- Micromine and QGIS usage
- Time management
- Datamine(Studio RM) software proficiency
- Data interpretation
- Geological mapping and evaluation
- Flexible
- Mine site safety compliance
- Chip and core logging
- Technical report writing
- Studiomapper for visualization
- MineCAD and MicroStation expertise
- Sample collection and analysis
- Communication skills
- Grade optimization and efficiency
- Advanced Microsoft Office
Short Courses
- Future leadership, Wits University, 2022-05-01, 2022-10-01
- Drilling methods and techniques in resource exploration (GSSA), 2021-02-01 - 2021-03-01
- Fusion DHLogger, Datamine, 2022-03-01 - 2022-03-01
- Toastmasters, 2021-03-01 - 2022-11-01
Affiliations
Geological Society of South Africa (GSSA), Candidate Natural Scientist, 139028
References
Available upon request
Timeline
Production Geologist
South Deep Mine
07.2025 - Current
Entry Level Geologist
Prieska Copper Zinc Mine
10.2023 - 07.2024
Geology Graduate
Assmang Exploration Project (Iron & Mn)
02.2022 - 04.2023
Geology Graduate
Two Rivers Platinum Mine
10.2020 - 01.2022
BSc Honor's - Geology
University of Fort Hare
BSc - GIS & Geology
University of Fort Hare
Matric -
Oscar Mpetha High