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Shannon Lewis

Available to hire

I’m Shannon Lewis, an AI generalist and crowdsourcing professional with 20+ years of hands-on experience supporting data-driven and machine-learning workflows.

About

I’m Shannon Lewis, an AI generalist and crowdsourcing professional with 20+ years of hands-on experience supporting data-driven and machine-learning workflows. Since 2006, I’ve worked extensively with platforms like Amazon Mechanical Turk, Clickworker, and Appen to build and improve labeled datasets and evaluation pipelines across challenging, real-world data.

I specialize in human-in-the-loop annotation and quality control for text, images, audio, video, and structured/tabular data. I apply strong critical thinking to review, rank, and classify AI outputs—using methods aligned with RLHF and reward-model development—while handling messy source material through careful guideline-driven labeling, validation, and research.

  • 20 years' experience
  • Joined September 2026

Industry experience

  • Software & Internet
  • Media & Entertainment
  • Professional Services

Work experience

Crowdsourcing Worker / Data Annotation & Evaluation · Amazon Mechanical Turk (MTurk)Jan 2006 – Present · 20 yrs 11 mos

Completed distributed human-intelligence tasks covering data collection, annotation, evaluation, transcription, research, validation, classification, and content review in support of ML development and large-scale labeling needs.

AI Generalist / Human-in-the-Loop AI & Data Annotation ProfessionalJan 2006 – Present · 20 yrs 11 mos

Applied project-specific annotation guidelines to label and structure information for machine-learning and LLM workflows, including NER/NLP (people, places, organizations, events, dates), sentiment/intent/semantic labeling, and classification. Performed image annotation with bounding boxes and polygon segmentation, plus extraction and validation from scans, handwritten documents, audio, and video requiring human interpretation. Reviewed and ranked AI-generated outputs using preference-based judgment aligned with RLHF and reward-model development, focusing on contextual understanding, consistency, and best-fit classification. Supported audio/speech tasks such as transcription, speaker identification, emotion/intent/semantics labeling, and validation of low-quality inputs. Conducted structured data validation for accuracy, completeness, consistency, and relevance, and performed content moderation according to project rules.

AI Data Annotation & Human-in-the-Loop Evaluator · Amazon Mechanical Turk (MTurk)Jan 2006 – Present · 20 yrs 11 mos

Performed distributed human-intelligence tasks including data collection, annotation, evaluation, transcription, research, validation, classification, and content review to support machine-learning development. Supported large-scale review and labeling workflows, applying project-specific rules and quality requirements while resolving ambiguous, incomplete, or low-quality data using critical thinking and attention to detail.

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