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Henry DerickHD
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Henry Derick

@henryderick

Senior AI evaluator and annotator specializing in RLHF, prompt engineering, and safety QA.

Kenya
Message

What I'm looking for

I’m looking to help teams build safer, more reliable AI by evaluating LLM reasoning, applying RLHF, and refining prompts. I want a role where my OSINT fact-checking and cybersecurity-leaning logic directly improve training and hallucination control.

I’m a detail-oriented AI Data Annotator and Evaluator, bringing specialized domain expertise across Health Services Management, STEM, and Cybersecurity. I evaluate and rate Large Language Model (LLM) responses for factual accuracy, logical consistency, and safety alignment, with a 99.8% quality score across 10,000+ completed tasks. I’m equally comfortable stress-testing reasoning through complex, multi-turn prompt work.

My core strength is making AI outputs dependable: I perform Reinforcement Learning from Human Feedback (RLHF) and deliver highly detailed written feedback to engineers on hallucination rates and contextual failures. Using Open Source Intelligence (OSINT), I complete rigorous fact-checking for obscure data points and technical claims—reducing model hallucination rates by over 40% in targeted testing domains. I also verify academic-style logic and technical reasoning to support high-precision evaluation of advanced reasoning models.

Alongside AI evaluation, I work as a Cybersecurity & Network Analyst (independent/self-directed), analyzing network traffic, security logs, and malware behaviors. I use Wireshark, Nmap, Burp Suite, and Kali Linux, and complete rigorous vulnerability assessment labs via PortSwigger and TryHackMe, simulating over 50 advanced red-team engagements. I’m pursuing a Bachelor’s Degree in Health Services Management (expected 2026), which strengthens my ability to label and evaluate domain-specific medical/health logic.

Experience

Work history, roles, and key accomplishments

MD
Current

Senior AI Subject Matter Expert

Mindrift & DataAnnotation.tech

Jan 2023 - Present (3 years 6 months)

Evaluate and rate LLM responses for factual accuracy, logical consistency, and safety alignment while writing and refining complex multi-turn STEM prompts. Perform OSINT-driven fact checking and provide detailed feedback to engineers on hallucinations and contextual failures.

Education

Degrees, certifications, and relevant coursework

KU

Kenyatta University & Strathmore University

Bachelor of Health Services Management, Health Services Management

Bachelor’s degree in Health Services Management at Kenyatta University and Strathmore University (expected 2026), with coursework in epidemiology, health administration, data analysis, and systems management. Applies healthcare and administrative knowledge to evaluate and label domain-specific medical/health logic AI models.

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