Assay Lab Supervisor

About the role

G Mining Ventures (GMIN) acquired the OKO West gold project in northwest Guyana in July 2024. The Assay Lab Supervisor oversees an assigned laboratory shift or crew, reporting to the Assay Lab Manager. The supervisor directs daily production, assigns work, monitors QA/QC and ensures compliance with approved procedures. The role suits an experienced chemist or assayer with the technical breadth and leadership to run the full laboratory workflow.

Key responsibilities

• Direct and prioritise daily laboratory production to meet sample throughput, turnaround times and safety standards.
• Supervise technicians, assayers and sample-preparation staff, assigning work by training and competency.
• Coordinate shift coverage, handovers, onboarding, training and performance feedback with the Lab Manager, and identify cross-training needs.
• Ensure approved procedures for sample identification, preparation, fire assay, chemistry, instrument operation and QA/QC are followed.
• Monitor QA/QC (blanks, standards, duplicates), coordinate reruns and corrective actions, and review batch records and analytical data.
• Provide technical direction and troubleshooting in sample preparation, fire assay and analytical testing.
• Enforce HSE controls for lead, dust, silica, hot furnaces, acids, cyanide, compressed gases and chemical handling, and stop unsafe work.
• Monitor equipment condition, reagent stocks and sample flow, and coordinate with Process, Geology, Metallurgy and other lab customers.
• May temporarily perform tasks of lower-level lab positions when authorised and trained.

Required profile

• Minimum 7 years of experience in an assay laboratory, including supervisory or crew-lead experience.
• Diploma, degree, certificate or equivalent training in Analytical Chemistry, Chemistry, Laboratory Technology, Assaying, Metallurgy or a related field; practical experience may be accepted in lieu of formal education where permitted.
• English-speaking, able to write and speak clearly and prepare shift and technical reports.

Required skills

• Sample preparation, fire assay, wet chemistry and common mining-lab instruments.
• Laboratory QA/QC, analytical data review, method control and investigation of non-conforming results.
• Crew management, training, handovers and LIMS or other approved data systems.

What we offer

• 14 days on and 7 days off schedule.
• Transport, accommodation and meals provided on site.
• Competitive salary, benefits, bonus and group insurance.