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Ambrose Sesay

@ambrosesesay

AI data annotator at Mindrift, RWS Group, and Micro1, producing 98%+ accurate multimodal labels and RLHF preference data.

Sierra Leone

Message

What I'm looking for

I'm open to remote freelance or contract work in data annotation, AI training and evaluation, and RLHF, part-time or project-based alongside my current full-time role. I'm also open to discussing full-time remote AI data roles.

At Mindrift (Powered by Toloka), I annotate text prompts and model responses, apply RLHF protocols to rank model outputs, and conduct adversarial red-teaming to identify vulnerabilities and policy violations.

At RWS Group, I completed multimodal image, audio, and video annotation for AI training pipelines with 98%+ accuracy. I also supported Krio↔English and French translation and linguistic review for AI localization projects.

At Micro1, I generated annotated datasets for robotic emulation tasks and labeled spatial, visual, and kinematic sensor data to support model training.

At Sierra Leone Digital Seeds, where I currently serve as Director of Programmes / Head of MEL, I implemented data collection and quality assurance frameworks and integrated KoboToolbox and SurveyCTO, improving reporting efficiency by roughly 30%.

Experience

Work history, roles, and key accomplishments

Current

Remote Freelance AI Data Annotator & Trainer

Current

Mindrift (Powered by Toloka)

Apr 2026 - Present (6 months)

Label and annotate diverse datasets with precision, apply RLHF protocols to evaluate model responses, and conduct adversarial prompting and red-teaming to identify vulnerabilities.

Data Annotation RLHF Adversarial Red Teaming Prompt Engineering Hallucination Mitigation Content Safety Tagging Multimodal Labeling

Current

Remote AI Data Specialist / Translator

Current

RWS Group

Jun 2025 - Present (1 year 4 months)

Execute large-scale video, audio, and image annotation tasks for AI model training pipelines, maintaining 98%+ accuracy. Deliver Krio-English and French translation and linguistic review for AI localization projects.

Data Annotation Multimodal Labeling Translation Localization Quality Assurance Linguistic Review

Current

Director of Programmes / Head of MEL

Current

Sierra Leone Digital Seeds

Jan 2025 - Present (1 year 9 months)

Designed and implemented data collection and quality assurance frameworks, achieving full compliance with national and donor reporting standards. Supervised high-volume field data collection operations and improved reporting efficiency by roughly 30% through digital data tools.

Data Quality Assurance Data Collection KOBOToolbox SurveyCTO Reporting MEL Data Analysis

Remote AI Trainer

Micro1

Feb 2026 - Mar 2026 (1 month)

Generated expert-annotated datasets for robotic emulation tasks and annotated multimodal sensor data to support AI object recognition and spatial-awareness model training.

Data Annotation Multimodal Data Object Recognition Spatial Awareness NLU Label Conventions

Teacher Coach (Data & MEL Focus)

National Youth Awareness Forum (NYAF-SL)

Jan 2022 - Jan 2025 (3 years)

Trained 60+ educators on ethical data collection, evidence-based tracking, and structured data documentation methods. Awarded 'Best Teacher Coach' (2023) for demonstrating measurable, data-driven improvements in performance outcomes.

Training Data Collection Data Documentation MEL Coaching