Title: Senior Mine Geologist Opportunities (3 positions) – Sotta Mining Corporation Limited – December 2025

Senior Mine Geologist (3 positions) Reports to: Mine Geology Superintendent

The Senior Mine Geologist is directly accountable for leading all daily GC activities in the open pit and for delivering robust geological inputs in line with the MMP. The role leads GC block modelling and wireframing, plans and supervises RC grade control drilling, and manages GC sampling and logging to ensure precise ore–waste delineation and strict control of dilution and ore loss.

The Senior Mine Geologist safeguards the accuracy and integrity of all geological data through validation and effective database management, ensuring that operational decisions are based on reliable, up-to-date information. The role is also responsible for operational EOM reporting and mine-to-mill reconciliation, and has clear accountability for defining and applying NAF/PAF criteria, and for ensuring material is routed correctly to waste rock dumps (WRDs), NAF/PAF destinations with operational and environmental requirements.

Roles and Responsibilities:

• Identify geology-related hazards at pit faces and drill patterns (access, bench edges, interaction with equipment, heat, dust, visibility) and intervene or stop work where conditions are unsafe.
• Supervise and mentor Mine Geologists, Junior Geologists and Grade Control Technicians to build capability in GC drilling supervision, sampling, logging, GC wireframing, GC block modelling, database management and reconciliation.
• Provide on-the-job training and coaching to develop national staff, supporting structured competency development and succession planning.
• Plan and supervise RC GC drilling programs to achieve appropriate data density for ore–waste delineation in line with the MMP.
• Lead QA/QC for GC sampling (standards, blanks, duplicates, repeats) and investigate and close out any QA/QC issues.
• Maintain and update GC mineralisation wireframes using current drilling, mapping and logging data.
• Build and update short-range GC block models to support ore mark-up, short-term planning and dilution control.
• Issue clear, accurate ore polygons and dig plans to Mining and Survey to minimise ore loss and dilution and meet grade targets.
• Ensure all GC drilling, sampling, logging and assay data are captured, validated and loaded into the geological database in a timely manner.
• Maintain a clean, auditable GC database (including NAF/PAF coding) with robust data validation and QA/QC checks.
• Lead operational reconciliation: GC model vs mined (survey) and mined ore vs plant feed in collaboration with Metallurgy and Mining.
• Prepare monthly reconciliation summaries, including tonnage, grade, dilution and ore loss, and explain key variances and trends.

Qualifications and Licences / Experience / Skills:

• Bachelor’s degree in Geology, Geological Engineering or equivalent.
• Over 7 years experience in open-pit mine geology and grade control for gold or base metal.
• Demonstrated capability in wireframing and block modelling for operational decision-making and dilution control.
• Proficiency with Micromine for wireframing, modelling and grade control; experience with AcQuire for data management and QA/QC in greenfield to operational ramp-up projects.

Application method: Send a covering letter together with your detailed CV and certificates to [email protected]

Company address: HR Manager, Sotta Mining Corporation Limited, P.O. Box 434, Mwanza

Deadline for applications: 5th January 2026. Only shortlisted applicants will be contacted.