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Mbongeni Sibiya

@mbongenisibiya

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AI data annotator and IT professional specializing in annotation, RLHF, and model alignment.

South Africa

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What I'm looking for

I seek roles focusing on AI data annotation, RLHF, and model alignment within collaborative teams that value ethics, continuous learning, and practical impact.

I am an AI data annotator and IT professional with hands-on experience creating high-quality datasets across text, audio, video and image modalities to improve LLM and multimodal model performance. I bring proven skills in fact-checking, intent verification, structured web research, and delivering targeted prompts and feedback to refine AI outputs.

My background includes remote roles annotating voice and video data, implementing RLHF workflows, and applying prompt engineering to increase response relevance and ethical alignment. I also have practical IT support experience—troubleshooting Tier 1/2 issues, migrating organizations to Office 365, and configuring LAN/WAN and VoIP systems.

I am currently pursuing a BSc in Computing and combine technical fluency in Python, SQL and Java with tools like Docker, Git and CI/CD. I am committed to building accurate, user-centered AI systems and sharing knowledge through clear documentation and collaboration.

Experience

Work history, roles, and key accomplishments

Current

Voice Audio Data Annotator

Current

Alignerr

Jul 2025 - Present (4 months)

Annotated and structured voice/audio datasets to improve speech recognition and conversational models; performed fact‑checking and intent verification and provided targeted prompts and structured feedback to refine AI responses.

Speech Recognition Fact Checking Intent Verification Prompt Engineering Quality Assurance Remote Collaboration

Advanced AI Data Trainer

Invisible Technologies

Jan 2025 - Mar 2025 (2 months)

Performed video annotation and web research to validate AI-generated video descriptions, applied prompt engineering, and implemented RLHF workflows to align multimodal AI outputs with human intent and ethical guidelines.

Multimodal Datasets Web Research Fact Checking Prompt Engineering Model Alignment

IT Support Intern

Alison Communications

Sep 2018 - Apr 2019 (7 months)

Delivered Tier 1 and 2 support, led migration to Microsoft Office 365, installed and configured LAN/WAN and VoIP systems, and authored technical documentation to improve support efficiency.