Mine Geologist at Williamson Diamonds Limited – November 2026

Employer: Williamson Diamonds Limited (WDL)
Job Title: Mine Geologist
Location: Mwadu, Shinyanga, Tanzania
Industry: Mining
Date Posted: 9 November 2026
Application Deadline: 23 November 2026
Recruitment Outcome Date: 8 December 2026

About Williamson Diamonds Limited

Williamson Diamonds Limited (WDL) operates Mwadu Diamond Mine in Shinyanga, Tanzania. The mine is a large-scale open-pit diamond mining operation.

The company invites applications from suitably qualified, experienced, and motivated professionals for the position of Mine Geologist.

Job Purpose

The Mine Geologist will lead and coordinate geological activities at Mwadu Diamond Mine, focusing on geological modelling and orebody interpretation, daily grade control, geological mapping, drilling and sampling programmes, reconciliation, and geological database management.

The position will provide technical direction to the geology team and ensure that reliable geological information supports mine planning, mining operations, and plant performance.

The successful candidate will contribute to the safe and efficient extraction of diamond-bearing kimberlite while minimising ore loss and dilution.

Key Duties and Responsibilities

1. Geological Modelling and Orebody Interpretation

• Develop, update, and validate geological models of the kimberlite orebody using drilling, mapping, sampling, and survey data.
• Interpret kimberlite geology, lithological units, contacts, and geological structures that influence ore distribution and mining.
• Support resource estimation and model updates in consultation with relevant technical specialists.
• Provide geological input into short-, medium-, and long-term mine plans and production schedules.
• Identify geological risks and opportunities that may affect ore tonnage, grade, and diamond recovery.
• Ensure geological models are properly documented, reviewed, and version-controlled.

2. Daily Grade Control and Geological Mapping

• Lead daily grade control activities to support ore identification, ore-waste delineation, and efficient mining operations.
• Direct detailed geological mapping of pit faces, benches, and other relevant mining areas.
• Review and verify geological field data to ensure accuracy and consistency.
• Communicate ore and waste boundaries and geological changes promptly to Mining Operations and Mine Planning.
• Monitor adherence to grade control procedures to minimise ore loss and dilution.
• Maintain accurate geological maps, sections, records, and technical documentation.

3. Drilling, Sampling and Quality Assurance

• Plan, coordinate, and supervise geological drilling and sampling programmes in line with approved work plans.
• Ensure drill core or chip logging, sampling, and sample handling follow approved procedures and quality assurance standards.
• Review drilling and sampling results and integrate them into geological interpretation and models.
• Coordinate with Drilling and Blasting, Survey, and other relevant teams to support geological data collection.
• Ensure sample security, traceability, and accurate recording of sampling information.

4. Reconciliation and Reporting

• Reconcile geological models, grade control results, mine production, and plant performance.
• Analyse variances and recommend corrective actions to improve geological and planning accuracy.
• Prepare daily, weekly, monthly, and quarterly geological reports, technical summaries, and management presentations.
• Provide accurate and timely geological information to management and relevant operational departments.
• Support the preparation of the geology budget, forecasts, and work programmes.

5. Geotechnical and Survey Coordination

• Integrate structural and rock-mass information into geological interpretation in coordination with the geotechnical team.
• Support pit slope stability monitoring through geological mapping and structural interpretation, where required.
• Coordinate with the Survey team to ensure geological information is integrated with survey data and mine plans.
• Communicate geological hazards that may affect pit stability or mining activities to the responsible teams.
• Maintain effective communication with the Geology, Survey, Mining, Planning, and Processing teams.

6. Geological Database and Software Management

• Oversee the capture, validation, storage, and maintenance of geological data in the relevant databases.
• Ensure geological information is accurate, current, traceable, and accessible to authorised users.
• Use ArcGIS for geological mapping and spatial data presentation.
• Apply relevant geological modelling and mine-planning software to analyse and interpret geological data.
• Prepare geological maps, sections, data summaries, and technical reports.
• Maintain appropriate records of field observations, grade control activities, and geotechnical monitoring results.

7. Leadership, Safety and Compliance

• Supervise, teach, and mentor geologists, geology technicians, and students undertaking practical training.
• Allocate tasks, review work quality, and promote knowledge transfer and succession planning within the geology team.
• Develop, review, and implement standard operating procedures for geological activities.
• Promote compliance with WDL’s safety, health, environmental, and operational requirements.
• Participate in risk assessments, inspections, incident investigations, and Safety, Health and Environment (SHE) meetings.
• Perform other related duties assigned by the responsible manager, within the employee’s competence and authorisation.

Minimum Qualifications

• Bachelor’s Degree in Geology, Applied Geology, Engineering Geology, or an equivalent relevant discipline.
• A postgraduate qualification in Geology, Geosciences, Resource Geology, or a related field will be an added advantage.
• Registration with a relevant professional body, where applicable.

Required Work Experience

Applicants should demonstrate relevant practical experience in the following areas:

• Relevant experience as a geologist in a mining environment, including experience in managerial positions.
• Geological modelling and orebody interpretation in a mining environment. Experience in kimberlite geology will be an added advantage.
• Daily grade control, ore-waste delineation, and detailed geological mapping.
• Planning and supervision of drilling, logging, and sampling programmes, including quality assurance.
• Reconciliation of geological models, mine production, and plant performance.
• Geological data entry, validation, database management, and reporting.
• Use of ArcGIS, Surpac, and other relevant geological modelling software.
• Leading, supervising, and developing geologists and technical personnel.
• Experience in open-pit mining, particularly large-scale mining operations, will be preferred.
• Experience in diamond mining or kimberlite operations will be a strong advantage.

Key Competencies and Skills

The successful candidate should demonstrate:

• Strong knowledge of geological modelling, kimberlite geology, and grade control practices.
• Ability to lead, coach, and develop a geology team.
• Ability to prepare concise and accurate geological reports and presentations.
• Ability to analyse and interpret geological data and communicate findings clearly.
• Computer literacy and proficiency in ArcGIS and other relevant geological software.
• Understanding of structural geology and its implications for mining and slope stability.
• Self-initiative, discipline, accountability, and strong safety awareness.
• Strong analytical, observation, decision-making, and problem-solving skills.
• Attention to detail and commitment to accurate data management.
• Ability to work collaboratively with Mining, Survey, Planning, Processing, and Technical Services teams.

Application Instructions

Candidates who meet the required qualifications should submit an application explaining how they qualify for the position.

Applicants must include the following documents and information:

• Application letter.
• Detailed Curriculum Vitae (CV).
• Copies of academic and professional certificates.
• Names and contact details of three referees.
• Daytime telephone numbers.
• Email addresses.

Applications should be submitted through either of the following channels:

By Email:
joseph-mokoro@wdl.co.tz

Email Subject: Mine Geologist

By Postal Address:

Human Resources Manager
Williamson Diamonds Limited
P.O. Box 23
Mwadu, Shinyanga, Tanzania

Important Recruitment Information

• Application Deadline: 23 November 2026.
• Recruitment Outcome Date: 8 December 2026.
• Applicants who do not receive communication after the recruitment outcome date should consider themselves unsuccessful.
• Shortlisted candidates will be required to attend a panel interview.
• Pre-screening, profile testing, on-mine assessments, medical examinations, and security clearances form part of the minimum requirements and selection process.
• Employment of the successful candidate is subject to passing the on-mine induction and meeting the aforementioned selection criteria.

Local Employment and Capacity Development

Williamson Diamonds Limited supports Tanzania’s Mineral Policy (2009) and is committed to developing adequate local technical capacity to serve the mining industry.

The company aims to employ available local experts and develop succession plans to enable Tanzanians to take over expatriate positions.

Recruitment Fraud Warning

Williamson Diamonds Limited does not at any time request payment for recruitment purposes.

Anyone approached with a request for payment in connection with this recruitment should report the incident immediately through the following contacts:

Telephone: +255 28 276 3872 / +255 767 744 617
Email: info@wdl.co.tz

Official Application Email: joseph-mokoro@wdl.co.tz