Panagiotis (Panos) Zacharias
Dublin,Ireland
Summary
AI and Trust & Safety professional with 5+ years of experience supporting global digital platforms including Meta, Google, and TikTok (via vendor partnerships). Specialized in human-in-the-loop AI evaluation, multilingual model assessment, and platform integrity investigations across EMEA markets.
Experienced in evaluating LLM outputs in multiple languages, identifying policy and safety risks, and applying structured analytical frameworks to strengthen model alignment and platform safeguards.
Overview
12
12
years of professional experience
Work history
Generative AI Annotator
Covalen (on behalf of Meta)
Dublin
2024.11 - 2026.02
- Evaluate multilingual LLM-generated outputs and search responses using structured quality and safety frameworks
- Identify hallucinations, policy violations, and alignment gaps across Greek, German, and English datasets
- Provide calibrated feedback supporting human-in-the-loop training workflows
- Maintain consistent quality performance while adapting to evolving safety and policy standards
CoreOps Specialist
TikTok
Dublin
2023.11 - 2024.05
- Reviewed advertising content across EMEA markets to enforce compliance with platform and regulatory policies
- Identified abuse patterns and executed enforcement actions to mitigate reputational and platform risk
- Contributed to moderation workflow improvements enhancing consistency and operational efficiency
Investigation Analyst
Majorel (on behalf of Google)
Dublin
2021.03 - 2023.10
- Conducted high-sensitivity integrity investigations within the German market, identifying coordinated manipulation, misinformation risks, and abusive content patterns impacting Google Maps
- Applied OSINT methodologies to proactively monitor politically sensitive developments and emerging narratives, detecting abuse signals and platform vulnerabilities
- Synthesized large volumes of case-level data into structured intelligence summaries, highlighting enforcement blind spots and informing integrity strategy improvements
- Contributed to detection strategy enhancements that increased abuse identification rates (~15%)
- Maintained consistent performance above established quality benchmarks in high-risk review environments
Content Analyst
Majorel (on behalf of Google)
Dublin
2020.02 - 2021.03
- Ads Policy Enforcement: Reviewed and enforced 1,000+ ad campaigns, ensuring compliance with Google Ads Trust & Safety standards.
- Operational Excellence: Optimized workflows to reduce campaign review times by 30% while maintaining 100% quality rating.
Researcher (Internship)
Hellenic Confederation of Commerce (ESEE)
Athens, Greece
2014.07 - 2014.12
- Conducted political and economic research to support governance and public policy development.
- Drafted reports, policy recommendations, and briefing notes based on citizen feedback and data analysis.
- Assisted in preparing white papers and policy consultation submissions.
Education
Master of Arts - Communication Science
University of Vienna
Vienna 2017.10 - 1 2020
BA - Political Science
University of Crete
Rethymno 2011.09 - 7 2015
Diploma of Higher Education - Data Analytics
Dublin Business School
Dublin, Leinster 2022.09 - 12 2022
Skills
- AI Model Evaluation
- Human-in-the-Loop Systems
- Large Language Models (LLMs)
- AI Safety & Alignment
- Multilingual Content & Model Assessment
- Platform Integrity
- Trust & Safety Investigations
- Open-Source Intelligence (OSINT)
- Root Cause Analysis (RCA)
- Digital Risk Detection
Technical: SQL - Python - Tableau - Excel - SPSS - R
Timeline
Generative AI Annotator
Covalen (on behalf of Meta)
2024.11 - 2026.02
CoreOps Specialist
TikTok
2023.11 - 2024.05
Diploma of Higher Education - Data Analytics
Dublin Business School
2022.09 - 12 2022
Investigation Analyst
Majorel (on behalf of Google)
2021.03 - 2023.10
Content Analyst
Majorel (on behalf of Google)
2020.02 - 2021.03
Master of Arts - Communication Science
University of Vienna
2017.10 - 1 2020
Researcher (Internship)
Hellenic Confederation of Commerce (ESEE)
2014.07 - 2014.12
BA - Political Science
University of Crete
2011.09 - 7 2015