Gray David

Key Skills

Software

Scale AI

Appen

Top Subject Matter

STEM (Mathematics, Coding, Science, General Knowledge Reasoning)

Nlp Domain Expertise

Speech Recognition

Top Data Types

Text

Audio

Document

Top Task Types

Prompt Response Writing SFT

Classification

Freelancer Overview

Senior AI Trainer & Machine Learning Specialist. Brings 5+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Scale AI and Appen. Education includes Doctor of Philosophy, University of Texas at Austin (2017) and Master of Science, University of Texas at Dallas (2013). AI-training focus includes data types such as Text and labeling workflows including Prompt + Response Writing (SFT) and Classification.

Labeling Experience

Senior AI Trainer & Machine Learning Specialist

Scale AITextPrompt Response Writing SFT

As Senior AI Trainer & Machine Learning Specialist at Scale AI, I led training and evaluation of large language models using prompt engineering and dataset development. I managed annotation teams delivering high-quality AI training data for LLMs across STEM domains. I developed evaluation frameworks and performed advanced annotation tasks in mathematics, coding, science, and factual reasoning.• Designed instructional prompts and datasets for complex AI reasoning tasks • Led efforts in AI safety, bias analysis, and model performance improvement • Improved dataset accuracy rates by implementing advanced QA processes • Contributed data to next-generation conversational AI systems

As Senior AI Trainer & Machine Learning Specialist at Scale AI, I led training and evaluation of large language models using prompt engineering and dataset development. I managed annotation teams delivering high-quality AI training data for LLMs across STEM domains. I developed evaluation frameworks and performed advanced annotation tasks in mathematics, coding, science, and factual reasoning.• Designed instructional prompts and datasets for complex AI reasoning tasks • Led efforts in AI safety, bias analysis, and model performance improvement • Improved dataset accuracy rates by implementing advanced QA processes • Contributed data to next-generation conversational AI systems

2019 - 2026

Data Annotation Specialist & AI Trainer

AppenTextClassification

As a Data Annotation Specialist & AI Trainer at Appen, I annotated large datasets for speech recognition and NLP models. I conducted semantic labeling and linguistic analysis to support development of conversational AI systems. My role involved evaluating AI-generated outputs for quality and safety compliance.• Produced labeled datasets for AI virtual assistants and search algorithms • Performed quality assurance checks on annotated data • Provided semantic and linguistic tagging for machine learning • Used proprietary and Appen tools for large-scale annotation tasks

As a Data Annotation Specialist & AI Trainer at Appen, I annotated large datasets for speech recognition and NLP models. I conducted semantic labeling and linguistic analysis to support development of conversational AI systems. My role involved evaluating AI-generated outputs for quality and safety compliance.• Produced labeled datasets for AI virtual assistants and search algorithms • Performed quality assurance checks on annotated data • Provided semantic and linguistic tagging for machine learning • Used proprietary and Appen tools for large-scale annotation tasks

2013 - 2015

Education

Work History