Serve as the resident authority on multilingual AI evaluation, communicating methodologies and upleveling best practices across Globalization Apple Services.5+ years of experience in evaluation science, data science, or ML systems development, with demonstrated experience owning evaluation systems at scale end-to-end Experience applying statistical methodology - sampling, significance testing, and confidence intervals Practical understanding of measurement validity principles Hands-on experience measuring annotator agreement, diagnosing divergence, and improving annotation protocols Proficiency with statistical tools and languages (R, Python, SQL) for analysis and reproducibility Experience designing evaluation frameworks adopted and scaled by operational teams Strong written and verbal communication skills for technical and non-technical audiences Direct experience handling sensitive and confidential information with integrity and discretion Ability to be onsite; this role is an in-person, onsite position Availability to work occasional evenings and weekends, as business needs require Up to 10% + travel; both domestic and internationalMaster's, PhD, or comparable experience in Statistics, Computational Linguistics, Computer Science, Psychometrics, Data Science, or related quantitative field. As a strategic individual contributor on the Globalization Quality and Operations team, you will design statistically grounded evaluation frameworks combining human judgment with scalable automation - partnering with Engineering, AI Strategy, and Production to turn evaluation into a strategic capability.