Bethel Sixtus A.

Key Skills

Software

Other

Top Subject Matter

Metallurgy (bauxite analysis, quality control lab)

Metallurgy (gold processing, CIL/CIP leaching control)

Materials processing (lime/quicklime quality control)

Top Data Types

Document

Text

Top Task Types

Data Collection

Freelancer Overview

Metallurgical Engineer / Quality Control Lab Technician at Ghana Bauxite Company. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other and Microsoft Excel. Education includes Bachelor of Science, University of Mines and Technology (2024) and High School Diploma, Mfantsipim School (2020). AI-training focus includes data types such as Document and labeling workflows including Data Collection.

Labeling Experience

AI Training Data Annotator / Research Study Participant

TextClassification

Completed AI training and data annotation studies via Prolific, a leading academic and commercial research platform. Tasks included evaluating and rating AI-generated responses, classifying text-based content, and providing structured human feedback to support machine learning model development. Contributed to multiple short-form annotation projects requiring attention to detail, consistency, and adherence to study guidelines

2025 - 2025

Metallurgical Engineer / Quality Control Lab Technician at Ghana Bauxite Company

OtherDocumentData Collection

Performed wet chemical analytical procedures on bauxite samples to generate structured measurements for quality control and reporting. Optimized sampling and sample-preparation workflows by recommending ore-specific grind-time determination and identifying sampling bias sources. Supported reliable downstream analytics by proposing a transition from stockpile sampling to cross-belt sampling with automated sampling recommendations.• Collected and recorded laboratory results for iron oxide, silica, LOI, alumina, moisture, and titanium.• Recommended process changes to improve analytical accuracy and consistency.• Collaborated with cross-functional teams to sample different bauxite grades.• Evaluated sampling reliability improvements via proposed automated systems.

2024 - 2025

Metallurgist at Carmeuse Lime Products Ghana Limited

OtherDocumentData Collection

Performed daily plant sampling and laboratory characterization on quicklime/hydrated lime to generate structured quality-assurance data. Measured physical and chemical properties using titration, density testing, sieve analysis, and loss-on-ignition procedures. Produced batch certification-relevant outputs by ensuring fineness and purity targets were met with consistent recorded measurements.• Conducted sieve analysis to verify product fineness across specified micrometer ranges.• Determined lime purity via rapid sugar titration using an HCl method for batch quality certification.• Measured density to assess material consistency and detect impurities.• Performed LOI tests at controlled temperature/time to evaluate calcination completeness.

2023 - 2023

Plant Metallurgist / Intern at Goldfields Ghana Limited

DocumentData Collection

Conducted routine metallurgical sampling and lab test work to produce structured datasets for plant performance monitoring and process control. Collected measurements across multiple critical process points and recorded key operating parameters to ensure leaching and adsorption efficiency. Supported accurate process modeling and control by performing particle size distribution, carbon activity, and cyanide titration tests.• Sampled 8+ critical points (e.g., SAG discharge, cyclone streams, CIL feed/tails) for monitoring datasets.• Executed laboratory tests including P80 sizing, carbon activity, and cyanide titration.• Recorded operational parameters such as pH, dissolved oxygen, and % solids density.• Assisted in milling circuit operations to support comminution and classification consistency.

2023 - 2023

Education

Work History