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Henry D.

Henry D.

Senior AI Subject Matter Expert & Annotator (Mindrift & DataAnnotation.tech)

Kenya flagNairobi, Kenya

Key Skills

Software

No software listed

Top Subject Matter

Healthcare services management
STEM (Physics)
AI safety and factuality

Top Data Types

TextText

Top Task Types

Red TeamingRed Teaming

Freelancer Overview

Senior AI Subject Matter Expert & Annotator (Mindrift & DataAnnotation.tech). Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Mindrift & DataAnnotation.tech, Wireshark, and Nmap. Education includes Bachelor of Science, Kenyatta University and Strathmore University (2026). AI-training focus includes data types such as Text, Computer Code, and Programming and labeling workflows including Evaluation, Rating, and Red Teaming.

Labeling Experience

Cybersecurity & Network Analyst (Independent)

Red TeamingRed Teaming

Conducted security-focused analysis and testing activities that required structured reasoning over technical logs and behaviors. Performed vulnerability assessment exercises using cybersecurity lab platforms to simulate adversarial scenarios and generate actionable findings. Applied analytical logic to parse complex data structures that supported downstream evaluation workflows. • Analyzed network traffic, security logs, and malware behaviors using industry tools. • Completed vulnerability assessment labs via PortSwigger and TryHackMe, simulating 50+ red-team engagements. • Used Wireshark, Nmap, Burp Suite, and Kali Linux for investigation and validation. • Translated structured analytical outcomes into reasoning-oriented evaluation skills.

2023 - Present

Senior AI Subject Matter Expert & Annotator (Mindrift & DataAnnotation.tech)

TextText

Evaluated and rated LLM responses for factual accuracy, logical consistency, and safety alignment as part of an AI quality assurance workflow. Conducted detailed quality checks and provided written feedback to improve model outputs for next-generation reasoning models. Performed RLHF-style evaluation and dataset quality maintenance across large task volumes. • Rated 10,000+ completed tasks while maintaining a 99.8% quality score. • Reviewed LLM outputs for hallucinations, contextual failures, and safety alignment. • Wrote and refined multi-turn STEM prompts to test reasoning capabilities. • Used OSINT-based fact-checking to verify obscure data points and reduce hallucination rates by 40% in targeted testing.

2023 - Present

Education

K

Kenyatta University and Strathmore University

Bachelor of Science, Health Services Management

Bachelor of Science
2022 - 2026

Work History

I

Independent

Cybersecurity and Network Analyst

Nairobi
2023 - Present
M

Mindrift

Senior AI Subject Matter Expert

Nairobi
2023 - Present