Assay Lab Supervisor

In 2020, G Mining Ventures (GMIN) was created to acquire direct ownership of projects and capitalize on the value uplift that successful mine development offers. In July 2024, GMIN has acquired the OKO West project. The OKO West Project is a new gold discovery in northwest Guyana. It is located south of the historical “OKO” gold district, some 95 km west of Georgetown.

To ensure the achievement of this large-scale project, G Mining Ventures is looking for an experienced and motivated individual to fill the position of:

Assay Lab Supervisor

The Assay Lab Supervisor is responsible for the supervision of an assigned laboratory shift or crew. The position provides direct supervision to assayers, laboratory technicians, and sample-preparation personnel, coordinates daily work assignments, monitors production and QA/QC performance, and ensures compliance with approved procedures. The Supervisor reports to the Assay Lab Manager and escalates matters requiring higher-level technical or managerial authority. The role may be filled by an experienced chemist or assayer who demonstrates the technical breadth and leadership needed to oversee the complete laboratory workflow.

Working Conditions

The Assay Lab Technician works in a mining and mineral processing environment with a combination of laboratory work and the handling of hazardous materials. They are responsible for maintaining a safe work environment. The role involves exposure to plant equipment, noise, dust, varying weather conditions, high-temperature furnaces requiring strict adherence to health, safety and PPE requirements. Extended hours may be required to support production objectives and operational needs.

Key Responsibilities

• Direct and prioritize daily laboratory production to meet required sample throughput, turnaround times, and safety standards.
• Supervise technicians, assayers, and sample-preparation personnel; assign work based on training, demonstrated competency, and operating priorities.
• Coordinate shift coverage, work allocation, handovers, relief arrangements, onboarding, training, competency verification, and performance feedback with the Assay Lab Manager; identify cross-training needs to maintain flexibility across laboratory work areas.
• Ensure approved sample identification, preparation, fire assay, chemistry, instrument operation, and QA/QC procedures are followed.
• Monitor production QA/QC, including blanks, standards, and duplicates; coordinate investigations, reruns, and corrective actions within authority.
• Review batch records and analytical data for completeness and consistency; escalate suspect results and significant quality concerns for technical review.
• Provide practical technical direction and troubleshooting in sample preparation, fire assay, and analytical testing within demonstrated competency.
• Ensure approved SOPs and work instructions are followed; identify gaps and recommend improvements to quality, safety, and productivity.
• Enforce HSE controls for lead, dust and silica, hot furnaces, acids, cyanide, compressed gases, chemical handling, and machinery; stop unsafe work.
• Monitor equipment condition and availability; coordinate operator checks, preventive maintenance, and specialist support when required.
• Monitor stocks of reagents, standards, crucibles, cupels, PPE, consumables, and critical spares; identify shortages and storage concerns.
• Track sample flow, production volume, turnaround times, rework, downtime, and staffing constraints; report operating bottlenecks.
• Coordinate daily work priorities with Process, Geology, Metallurgy, Environment, and other laboratory customers within agreed service levels.
• Ensure clear shift logs and handovers covering production status, priority samples, safety, QA/QC, maintenance needs, and unresolved actions.
• May be required, on a temporary basis, to perform tasks normally assigned to lower-level laboratory positions to meet operational needs, provided the employee has the necessary training, demonstrated competency, and authorization and follows applicable procedures and HSE controls.
• Perform other duties consistent with the nature and level of the position.

Working Experience:

• A minimum of 7 years of working experience in an Assay Laboratory, including demonstrated supervisory or crew-lead experience.

Qualification:

• Diploma, degree, certificate, or equivalent training in Analytical Chemistry, Chemistry, Laboratory Technology, Assaying, Metallurgy, or a related field; relevant practical experience may be accepted in lieu of formal education where permitted by company requirements.

Technical Skills/ Knowledge:

• Strong knowledge of sample preparation, fire assay, wet chemistry, and common mining-laboratory instruments; specialist expertise in each area is not required.
• Practical knowledge of laboratory QA/QC, analytical data review, sample integrity, method control, and investigation of non-conforming results.
• Ability to direct mixed technical and production crews, manage priorities, train personnel, coordinate handovers, and enforce safe work practices.
• Working knowledge of laboratory equipment, maintenance coordination, records, and LIMS or other approved data systems.
• Effective written and verbal communication skills in English; ability to prepare clear shift and technical reports.

Work Schedule:

• 14 days On & 7 days Off
• Transport, accommodations, and meals provided on site.

Compensation Package

• Competitive Salary
• Competitive benefits, bonus and Group Insurances