Mercy Chege

Detail-oriented AI Data Specialist and Civil Engineering graduate with hands-on experience in machine learning data annotation, quality assurance, dataset validation, and workflow optimization. Proven track record of achieving 99% annotation accuracy across computer vision and NLP projects. Strong analytical thinker with technical documentation skills, engineering precision, and a structured problem-solving approach.

Experienced in collaborating with ML engineers to improve model performance and annotation standards. Seeking to contribute to AI model development, data operations, and quality assurance teams in a growth-driven technology organization.

Associate – Data & Quality Operations - Samasource - Nairobi

(2024-04 - 2025-11)

• Performed data validation, cleaning, and structured analysis for AI and QA projects.
• Designed and executed test cases to verify dataset integrity and annotation accuracy.
• Documented findings and reported insights to QA and ML teams.
• Tracked project metrics to enhance operational efficiency.
• Contributed to workflow automation and reporting improvements.
• Supported continuous improvement initiatives for large-scale AI data pipelines.

Data Annotator – Machine Learning Projects - AfricaAI Labs - Nairobi

(2023-10 - 2024-02)

• Labeled and categorized datasets for computer vision and NLP models.
• Achieved and maintained 99% annotation accuracy through structured quality reviews.
• Conducted internal quality checks to ensure compliance with ML project standards.
• Collaborated with engineers to refine annotation guidelines and improve model outputs.
• Trained and mentored new annotators on tools and best practices.
• Utilized tools including Labelbox, V7 Darwin, and internal AI platforms.

Industrial Attachment – Civil Engineering - County Government of Nakuru - Nakuru

(2022-07 - 2022-09)

• Assisted engineers in supervising infrastructure projects.
• Conducted site inspections to ensure compliance with approved drawings.
• Supported preparation of technical reports and construction documentation.
• Gained exposure to public sector engineering project management.

Construction Assistant - Private Construction Company

(2023-07 - 2023-09)

• Supported daily site operations including concrete works and masonry tasks.
• Maintained compliance with safety standards and site procedures.
• Assisted in interpreting construction drawings and measurements.

Diploma - Civil Engineering - PC Kinyanjui Technical Training Institute (2021-09 - 2024-07)