Jephthah O.

Key Skills

Software

Mercor

CloudFactory

Data Annotation Tech

Labelbox

Micro1

Other

Top Subject Matter

Large Language Model (LLM) training

Evaluation Domain Expertise

and annotation quality assurance

Top Data Types

Text

Document

Top Task Types

RLHF

Data Collection

Freelancer Overview

Professional AI Trainer & Data Labeling Specialist (Freelance/Independent Projects). Core strengths include Microsoft 365. Education includes Bachelor of Science, University. AI-training focus includes data types such as Text and labeling workflows including RLHF and Data Collection.

Labeling Experience

Professional AI Trainer & Data Labeling Specialist (Freelance/Independent Projects)

TextRLHF

Trained and evaluated AI/LLM outputs using RLHF, preference ranking, and hallucination audits to produce high-accuracy labeled training and evaluation data. Conducted supervised fine-tuning style workflows and reviewed model outputs and digital artifacts with strong attention to correctness and consistency. Created and applied annotation quality standards to support reliable downstream model improvement.• Performed preference-ranking and hallucination audit labeling for LLM behavior alignment• Produced expert annotations across text-based prompts, responses, and digital artifacts• Identified and corrected inconsistencies/errors in model outputs to improve label quality• Supported evaluation workflows with clear guideline adherence and quality checks

2022 - Present

Data Analyst & Document Specialist (Freelance/Contract Roles)

TextData Collection

Performed dataset collection, cleaning, and verification work with a focus on accuracy and consistency prior to analysis and reporting. Edited and formatted document deliverables to professional standards while supporting team documentation and shared workflows. Reviewed large volumes of entries to ensure high-quality, submission-ready data artifacts.• Collected and cleaned datasets to improve data reliability for downstream use• Verified records for accuracy and consistency across large volumes• Formatted and edited Microsoft 365 documents for polished reporting• Contributed to shared documentation workflows and proactive team support

2021 - 2022

Education

Work History