SPP Leadership Team


Tad Waddington, Ph.D.

Executive People Planning Partner

Dr. Tad Waddington is an Executive People Planning Partner with deep expertise in human capital measurement and quantitative analytics. Dr. Waddington is an internationally recognized expert in the causes and consequences of investing in human capital. He has over 20 years of experience applying his Ph.D. from the University of Chicago in Measurement, Evaluation, and Statistical Analysis to solving problems in human capital development and impact. For 15 years, he was Accenture’s Director of Performance Measurement and, prior to Accenture, a Gallup Research Director. Tad’s first book, Return on Learning, looked at the consequences of investments in human capital. The book grew out of his analysis of hard-endpoint data of over a 250,000 records that showed that Accenture’s return on investment (ROI) in training was 353%. His second book, Lasting Contribution, investigated the causes of human capital. A wide-ranging book that drew on everything from Tad’s mastery of ancient Chinese to a fine-grained analysis of Oprah’s shoes, the book has been translated into seven languages and won seven awards.

Tad graduated Phi Beta Kappa and valedictorian from the Honors College at Arizona State University with a B.A. in Psychology. He then studied at Stanford’s Inter-University Program for Chinese Studies and received an M.A. from the Divinity School at the University of Chicago. Dr. Waddington holds a Ph.D. in Measurement, Evaluation, and Statistical Analysis from the University of Chicago.

Areas of Expertise

Bayesian Statistics


Human Capital Measurement

Mathematical Modeling -Predictive Analytics

Program Evaluation

Rasch Measurement

Research Design