Geotechnical Geologist at Williamson Diamonds Limited – November 2026

Employer: Williamson Diamonds Limited (WDL)
Job Title: Geotechnical Geologist
Location: Mwadu, Shinyanga, Tanzania
Industry: Mining
Application Deadline: 23 November 2026

About Williamson Diamonds Limited

Williamson Diamonds Limited (WDL) operates Mwadu Diamond Mine in Shinyanga, Tanzania, a large-scale open-pit diamond mining operation. The company invites applications from suitably qualified, experienced, and motivated professionals for the position of Geotechnical Geologist.

Job Purpose

The Geotechnical Geologist will provide geological and geotechnical support to mining operations, focusing on geotechnical monitoring, rock-mass characterisation, pit slope stability, daily grade control, geological mapping, and interpretation of geological data.

The position will support the safe and efficient management of the open pit, tailings facilities, slimes dam, and waste dumps. The successful candidate will also contribute to geotechnical stress modelling, slope stability radar monitoring, geological database management, and the integration of technical information into mine planning and operational decisions.

Key Duties and Responsibilities

1. Geotechnical Monitoring and Infrastructure Integrity

• Coordinate and undertake geotechnical monitoring of the open pit, tailings facilities, slimes dam, and waste dumps to assess their stability and suitability for continued use.
• Conduct routine inspections of pit walls, benches, and exposed rock formations.
• Identify geological structures, fractures, faults, bedding planes, and intersections that may affect slope stability.
• Monitor ground conditions and identify signs of deformation, seepage, cracking, rockfalls, or other indicators of potential instability.
• Collect, analyse, and maintain accurate geotechnical monitoring data.
• Recommend appropriate corrective and preventive measures in consultation with responsible technical specialists.

2. Slope Stability Monitoring Systems – Radar

• Monitor and interpret data from slope stability radar systems used to monitor pit development and deformation of open-pit walls.
• Analyse displacement trends, movement rates, and radar alerts to identify potential slope instability.
• Integrate radar results with field inspections, geological mapping, survey data, and other geotechnical monitoring information.
• Promptly communicate abnormal readings and potential failure indicators to the responsible technical and operational teams.
• Support the implementation of approved monitoring thresholds and trigger action-response procedures.
• Prepare regular radar monitoring reports and maintain records of movements, alerts, and actions taken.
• Support timely operational decisions and protective measures in accordance with approved mine procedures.

3. Geotechnical Engineering and Mine Planning

• Coordinate and manage geotechnical stress modelling to support mine plans, pit development, and new mine designs.
• Provide geotechnical input into pit slope configurations, excavation sequences, and ground-control measures.
• Assess geological structures and rock-mass conditions that may affect mine stability.
• Identify, assess, and communicate geotechnical risks to mine safety and informed decision-making.
• Work closely with Mine Planning, Mining Operations, Survey, Drilling and Blasting, and other relevant technical teams.
• Monitor the effectiveness of implemented risk-control measures and recommend improvements where necessary.

4. Daily Grade Control and Geological Activities

• Conduct daily grade control monitoring to support ore identification, ore-waste delineation, and efficient mining operations.
• Undertake detailed geological mapping of pit faces, benches, and other relevant mining areas.
• Collect, verify, record, and interpret geological field data to support grade control and mine planning.
• Identify geological variations and structures that may influence ore extraction and mining activities.
• Analyse geological data and communicate findings to relevant operational and technical teams.
• Support reconciliation and accurate geological reporting to improve planning and data accuracy.
• Maintain accurate geological maps, sections, records, and technical documentation.

5. Geological and Survey Coordination

• Undertake geological activities and coordinate with the Survey team to support mine operations.
• Ensure geological information is appropriately integrated with survey data and mine plans.
• Support the collection and verification of field information required for geological interpretation and operational reporting.
• Maintain effective communication with Geology, Survey, Mining, and Planning teams.

6. Geological Database and Software Management

• Capture, enter, validate, and maintain 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 and geotechnical software to analyse and interpret field data.
• Prepare geological maps, sections, data summaries, and technical reports.
• Maintain appropriate records of field observations, grade control activities, and geotechnical monitoring results.

7. Procedures, Safety and Compliance

• Develop, review, and implement relevant standard operating procedures for geological and geotechnical activities in consultation with responsible technical personnel.
• Conduct and participate in geotechnical risk assessments, inspections, and incident investigations.
• Promote compliance with WDL’s safety, health, environmental, and operational requirements.
• Maintain awareness of workplace hazards and report unsafe conditions promptly.
• Support the implementation of corrective actions and continuous improvement initiatives.
• Participate in Safety, Health and Environment (SHE) meetings and relevant technical reviews.

8. Reporting, Training and Teamwork

• Prepare daily, weekly, monthly, and quarterly reports as required.
• Produce concise geological reports and technical summaries based on field observations and data analysis.
• Provide technical information to management and relevant operational departments.
• Provide guidance to junior technical personnel and supervise geologists and students undertaking practical training, where required.
• Demonstrate self-initiative, discipline, accountability, and effective teamwork.
• 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.
• Relevant postgraduate qualifications or specialised training in geotechnical geology, rock mechanics, or slope stability 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 work experience as a Geologist or Geotechnical Geologist.
• Geological field data collection and recording.
• Detailed geological mapping in a mining environment.
• Daily grade control, ore-waste delineation, and support to mining operations.
• Geological data entry, validation, database management, and reporting.
• Use of ArcGIS for geological mapping and spatial data interpretation.
• Application of other relevant geological or geotechnical software.
• Geotechnical monitoring, rock-mass characterisation, and pit slope stability assessment.
• Slope stability radar operation or interpretation of radar monitoring data.
• Experience in open-pit mining, particularly large-scale mining operations, will be preferred.

Key Competencies and Skills

The successful candidate should demonstrate:

• Ability to conduct detailed geological mapping in the field.
• Ability to prepare concise and accurate geological reports.
• Ability to analyse and interpret geological data.
• Competence in capturing and maintaining geological data in databases.
• Computer literacy and proficiency in ArcGIS and other relevant geological software.
• Understanding of rock-mass characterisation and geotechnical risk identification.
• Ability to interpret slope stability radar data and recognise potential warning indicators.
• Self-initiative, discipline, accountability, and awareness of workplace procedures.
• Effective team communication and strong safety awareness.
• Strong analytical, observation, and problem-solving skills.
• Attention to detail and commitment to accurate data management.
• Ability to work collaboratively with Geology, Survey, Mining, Planning, and Technical Services teams.

Application Instructions

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

Applicants should include:

• 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: Geotechnical 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.
• Applicants who do not hear from the company after the communicated 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 stated 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