Open To Work
hellen Koka
Mamelodi East
Work Preference
Summary
Analytical Chemistry Professional experienced in laboratory testing, sample preparation, and interpreting analytical results. Achieved quality assurance excellence through adherence to GMP, GDP, and rigorous documentation practices, supporting audits and ensuring compliance with legal and national standards. Methodical Quality Assurance Officer focused on enhancing product quality and operational efficiency through effective process improvement, critical thinking, and clear communication.
Overview
10
10
years of professional experience
2
2
years of post-secondary education
Work History
Quality Assurance Officer
NTP Radioisotopes
02.2025 - 01.2026
- Ensured the quality and compliance of analytical work by reviewing and approving batch records, laboratory documentation, and product files according to SOPs and regulatory requirements.
- Checked and verified testing documentation to ensure accuracy, completeness, and full traceability before results or products were released.
- Prepared quality reports covering deviations, audit findings, corrective actions, quality metrics, and compliance issues to support continuous improvement in laboratory processes.
- Ensured all release procedures, records, and supporting documents met national and regulatory standards, similar to laboratory result verification required in toxicology, food, and blood alcohol casework.
- Supported compliance with Quality Control procedures by reviewing QC data, trend reports, and ensuring corrective actions were implemented where required.
- Worked according to GMP/GLP principles, ensuring proper documentation, housekeeping, safety, and adherence to controlled procedures.
- Maintained integrity of records and documentation in line with chain-of-custody and evidence-handling expectations required in analytical laboratory environments.
Chemistry Tutor
Tshwane University of Technology
08.2024 - 12.2024
- Provided focused guidance and support to students in small groups and one-on-one sessions, ensuring understanding of laboratory techniques and analytical procedures.
- Assisted students in performing laboratory experiments safely and accurately, following proper protocols and good laboratory practices (GLP).
- Supported preparation for assessments by reviewing key concepts, analyzing experimental data, and demonstrating problem-solving strategies.
- Promoted accuracy, attention to detail, and confidence in handling laboratory tasks, reinforcing the importance of compliance, documentation, and safe laboratory practices.
Quality Controller
Rocbolt Technologies
05.2018 - 04.2020
- Monitored and verified the quality of incoming materials, ensuring they met specifications before entering the production process.
- Conducted routine in-process tests to track product consistency and identify potential deviations early.
- Applied safety protocols and quality standards to minimize risk and ensure compliance throughout manufacturing.
- Performed thorough final product checks to detect defects or variations, supporting reliable and accurate release.
- Documented all inspections, test results, and corrective actions to maintain traceability and audit readiness.
- Worked closely with production teams to troubleshoot quality issues, optimize procedures, and enhance overall operational efficiency.
QC Analyst
Rocbolt Texhnologies
Ekurhuleni
11.2016 - 05.2017
- Conducted quality inspections on raw materials and finished products for compliance.
- Collaborated with production teams to address quality concerns and implement solutions.
- Developed and maintained detailed documentation of quality control processes and procedures.
In-Service Training (Practical 1 and 2)
Tshwane University of Technology
02.2016 - 11.2016
- Supported quality control activities within Pharmaceutical Science Department by conducting routine checks and validations, ensuring compliance with industry standards.
- Conducted chemical sample testing and preliminary analysis under supervision, ensuring accuracy and compliance with SOPs.
- Applied laboratory techniques and safety protocols consistently, following GLP and departmental guidelines.
- Assisted with research projects through data collection, processing, and interpretation, contributing to the advancement of scientific studies.
- Maintained laboratory equipment and inventory, ensuring operational readiness for analytical work and minimizing downtime.
- Gained practical experience in analytical and pharmaceutical chemistry, developing skills in precision, documentation, and laboratory best practices.
Education
Postgraduate Diploma - Chemistry
Tshwane University of Technology
Tshwane 01.2023 - 12.2023
Advanced Diploma - Analytical Chemistry
Tshwane University of Technology
Tshwane 01.2022 - 12.2022
Diploma - Analytical Chemistry
Tshwane University of Technology
Grade 12 (Matric) - Life Sciences, Mathematics, Physical Science, Life Orientation, Geography, English, Sepedi
Lehlabile Secondary School
Tshwane 01.2010 - 01.2010
Skills
- Quality Control
- Compliance Checking
- Regulatory Compliance
- LIMS
- Data Management
- Data Validation
- Document Control
- Laboratory Documentation
- Preparation & Analysis
- Sample Extraction
- Result Processing
- Instrumentation
- Statistical Analysis
- Data Interpretation
- Research
- Process Improvement
- Risk Assessment
- Report Writing
- Excel
- Microsoft Word
- Laboratory Databases
- Good Communication
- Interpersonal Skills
- Analytical Thinking
- Problem-Solving
- Statistical Analysis
Personal Information
Gender: Female
Languages
English
First Language
Timeline
Quality Assurance Officer
NTP Radioisotopes
02.2025 - 01.2026
Chemistry Tutor
Tshwane University of Technology
08.2024 - 12.2024
Postgraduate Diploma - Chemistry
Tshwane University of Technology
01.2023 - 12.2023
Advanced Diploma - Analytical Chemistry
Tshwane University of Technology
01.2022 - 12.2022
Quality Controller
Rocbolt Technologies
05.2018 - 04.2020
QC Analyst
Rocbolt Texhnologies
11.2016 - 05.2017
In-Service Training (Practical 1 and 2)
Tshwane University of Technology
02.2016 - 11.2016
Grade 12 (Matric) - Life Sciences, Mathematics, Physical Science, Life Orientation, Geography, English, Sepedi
Lehlabile Secondary School
01.2010 - 01.2010
Diploma - Analytical Chemistry
Tshwane University of Technology