Marcum H.

Key Skills

Software

Other

Top Subject Matter

Egocentric video data curation and dense action annotation

Multilingual translation and English linguistic annotation

LLM evaluation

Top Data Types

Video

Text

Audio

Document

Top Task Types

Action Recognition

Segmentation

Tracking

RLHF

Entity (NER) Classification

Freelancer Overview

Senior Project Contributor and Team Lead, AI (Atlas Capture). Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other and OpenTrain AI. Education includes Bachelor of Science, University of Arizona (2025) and Specialization, Arizona State University (2023). AI-training focus includes data types such as Video, Text, and Audio and labeling workflows including Action Recognition, Segmentation, and Tracking.

Labeling Experience

Data Annotation Tech & Outlier

VideoSegmentationTracking

No description provided.

2025 - Present

AI Model Alignment & Translation Expert (Aligner & OpenTrain AI Present)

Audio

Provided expertise to train, optimize, and fine-tune advanced multilingual language models with a focus on translation and localization. Edited and translated AI-generated outputs to improve cultural appropriateness, grammar, and overall accuracy for localization. Evaluated synthetic Text-to-Speech (TTS) voice outputs and audio datasets, giving detailed technical feedback on cadence, pronunciation, and naturalness. • Supported multilingual model fine-tuning for translation • Localized translations for cultural and linguistic accuracy • Rated TTS audio quality for naturalness and delivery • Supplied technical evaluation input for audio datasets

2025 - Present

AI Trainer & Domain Expert (Data Annotation Tech & Outlier)

OtherTextRLHF

Developed multi-part questions and evaluated AI responses for content quality, logical reasoning, safety, and fact-checking. Trained, fine-tuned, and aligned state-of-the-art frontier LLMs using Reinforcement Learning from Human Feedback (RLHF). Conducted domain reviews and scored model answers for compliance with constraints and style guidelines. • Authored question sets and assessed answer components • Applied RLHF processes to align and improve LLM behavior • Performed compliance and style guideline scoring • Verified safety and factuality aspects of AI answers

2025 - Present

Freelance AI Specialist and Software Developer - Upwork

AudioSegmentationTracking

Provide freelance AI and software development services for international technology clients with multi-task delivery needs. Design, develop, and maintain responsive web applications and SEO-optimized websites while supporting translation and speech-related data collection workflows. Deliver clean technical documentation and custom coding solutions, managing projects through independent execution. • Execute translation, speech collection, and English linguistic annotation projects • Design and build responsive web apps and SEO-optimized websites • Provide high-fidelity data processing and custom coding solutions • Produce clean technical documentation with strong client satisfaction

2023 - Present

Freelance AI Specialist & Software Developer (Upwork)

OtherText

Performed high-volume AI-related linguistic annotation and translation tasks for international tech clients. Supported speech collection and English linguistic annotation workflows for multi-task data processing. Delivered clean documentation and reliable, client-facing data outputs across multiple projects. • Translated and localized content for client requirements • Produced English linguistic annotations for training datasets • Supported speech collection workflows for downstream modeling • Created technical documentation for data processing and custom solutions

2023 - Present

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Education

Work History