Collins Okpala

Key Skills

Software

Mercor

Top Subject Matter

AI systems

LLM alignment

content safety

Top Data Types

Text

Document

Top Task Types

RLHF

Freelancer Overview

AI Training Generalist. Brings 1+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Mercor and Upwork. Education includes Bachelor of Science, University of Nigeria, Nsukka (2021). AI-training focus includes data types such as Text and labeling workflows including RLHF.

Labeling Experience

AI Training Generalist

MercorTextRLHF

As an AI Training Generalist at Mercor, I delivered high-precision feedback on model responses in an RLHF framework. My work involved testing response pairs, auditing prompts, and ensuring safety, factuality, and guideline compliance. I also reviewed annotations and directly labeled sentiment for algorithmic safety evaluation. • Conducted model response pairwise comparisons with over 99% accuracy. • Audited prompts and submissions in alignment with safety and formatting rules. • Labeled over 30 sentiment labels per hour for compliance verification. • Provided constructive feedback to junior annotators.

As an AI Training Generalist at Mercor, I delivered high-precision feedback on model responses in an RLHF framework. My work involved testing response pairs, auditing prompts, and ensuring safety, factuality, and guideline compliance. I also reviewed annotations and directly labeled sentiment for algorithmic safety evaluation. • Conducted model response pairwise comparisons with over 99% accuracy. • Audited prompts and submissions in alignment with safety and formatting rules. • Labeled over 30 sentiment labels per hour for compliance verification. • Provided constructive feedback to junior annotators.

2025 - 2026

Freelance Data Specialist

TextRLHF

As a Freelance Data Specialist on Upwork, I specialized in data annotation, RLHF ranking, and peer dataset review. I performed extensive ranking of model-generated response pairs for algorithmic learning and quality improvement. I also reviewed datasets, corrected labeling errors, and contributed to quality control processes. • Conducted RLHF ranking for over 500 model response pairs. • Performed peer-annotation to identify and rectify errors. • Cleaned, reorganized, and standardized textual datasets for reporting. • Maintained a 99% quality score throughout engagements.

As a Freelance Data Specialist on Upwork, I specialized in data annotation, RLHF ranking, and peer dataset review. I performed extensive ranking of model-generated response pairs for algorithmic learning and quality improvement. I also reviewed datasets, corrected labeling errors, and contributed to quality control processes. • Conducted RLHF ranking for over 500 model response pairs. • Performed peer-annotation to identify and rectify errors. • Cleaned, reorganized, and standardized textual datasets for reporting. • Maintained a 99% quality score throughout engagements.

2025 - 2025

Education

Work History