Experienced leader who enjoys creating happy, healthy, productive teams. I have years of experience leading hundreds of people and optimizing budgets of hundreds of millions of dollars.
Career
Senior Director, AIML Evaluation
Leading the Artificial Intelligence and Machine Learning (AIML) Evaluation group. A passionate, performant and dedicated group of software engineers, data scientists, data engineers, privacy experts, and ML engineers responsible for building infrastructure, creating novel methodology, and partnering with product groups across Apple to measure, understand, and proactively improve all of our products.
Senior Director, AIML Measurement
Senior Director, Maps Evaluation & SRE
Leading the Maps Evaluation and SRE Teams. Measuring, understanding, and qualifying the experience of Apple Maps users to enable the team to proactively and rapidly improve it, and deliver Maps reliably, at high quality and low cost.
Director, Maps Evaluation
Head of Evaluation Metrics – Maps, Senior Engineering Manager
Head of Metrics – Maps and iTunes, Engineering Manager
Senior Statistician
Software Engineer
Senior Search Quality Statistician
Search Quality Statistician
Led Human Evaluation for Google social initiatives (social search, +1).
Software Engineering Statistician Intern
Improving search quality via query stratification.
Consultant
Developing and analyzing test market methodology.
Quant Research Intern
Volatility forecasting, American option valuation techniques.
Server
Serving mediocre Italian cuisine with a smile.
Education
The Wharton School, University of Pennsylvania
PhD, Statistics
2005 – 2009
PhD Thesis: Bayesian Statistical Models for HIV Evolution
Masters Thesis: American Option Approximations
Swarthmore College
BA, Applied Mathematics & Economics
2002 – 2005
Learning in an arboretum with hippies.
Research
Apple Intelligence Foundation Language Models: Tech Report 2025
Bayesian Hierarchical Modeling of the HIV Evolutionary Response to Therapy
From Karen to Katie: Using Baby Names to Study Cultural Evolution
A Hierarchical Bayesian Variable Selection Approach to Major League Baseball Hitting Metrics
Indirect Content Privacy Surveys: Measuring Privacy Without Asking About It
Long- and Short-Term Selective Forces on Malaria Parasite Genomes
A Point-Mass Mixture Random Effects Model for Pitching Metrics
Consistency and Pythagoras
A spatially varying two-sample recombinant coalescent, with application to HIV escape response
Hobbies
Magic: The Gathering is a hobby I'm passionate about. Browse my decks below.
View My Decks on MoxfieldI occasionally post about things on Twitter (X).
@alexbraunstein