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Reagan Mugenda

@reaganmugenda

AI Training Specialist at Atlas evaluating instruction-following models with 99.2% rubric accuracy.

At Atlas, I evaluate model outputs against instruction, persona, tone, format, and length constraints. I maintain 99.2% rubric accuracy while completing 42–50 binary labeling tasks per hour.

At Luel AI, I sourced, audited, and verified photo and video datasets, preserving biometric data integrity with a 100% audit pass rate. Previously, at CrowdGen by Appen, I evaluated search responses and AI outputs across more than 2,000 test queries and applied PII masking protocols.

Experience

Work history, roles, and key accomplishments

Current

AI Training Specialist / RLHF Evaluator

Current

Atlas

Mar 2025 - Present (1 year 7 months)

Executed asynchronous batch labeling for instruction-following behavior, achieving 42-50 tasks per hour with 99.2% rubric adherence. Performed span-level annotations and evaluated multi-attribute criteria including tone, structure, and JSON validation.

Instruction Following RLHF Labeling Multi Attribute Scoring Span Level Annotation JSON Validation Tone Analysis Format Compliance Escalation Management

Multimodal AI Data Specialist

Luel AI

Jun 2024 - Feb 2025 (8 months)

Sourced, audited, and verified 30+ photo and 10+ video datasets, achieving a 100% audit pass rate. Executed multi-attribute annotation workflows and maintained strict protocol compliance across metadata verification pipelines.

Data Auditing Metadata And Reference Verification Annotations Visual Inspection Quality Assurance Cloud Storage Protocol Compliance

AI Content Evaluator / Search Evaluator

CrowdGen by Appen

Jan 2023 - May 2024 (1 year 4 months)

Evaluated search query responses and AI outputs for factual accuracy, user intent, and safety compliance across 2,000+ test queries. Executed PII masking and metadata tagging with 98.8% protocol accuracy.

Search Evaluation Factual Accuracy User Intent Safety Compliance PII Masking Metadata Tagging Quality Assurance

Education

Degrees, certifications, and relevant coursework

Chuka University

Bachelor of Science, Computer Science

Graduated with a Bachelor of Science in Computer Science in 2024, with relevant coursework in computational logic, human-computer interaction, technical writing, and data structures & algorithms.