[3] After graduating from business school, Stangle joined management consulting firm Arthur D. Little as a senior economist in Boston, Massachusetts until 1980.
Stangle and Michael F. Koehn co-founded Analysis Group in 1981 as an economic consulting firm focused on litigation and expert testimony.
[3] He serves as an expert witness in litigation cases on class certification, market definition, entry conditions, competitive effects, ERISA, and damages.
[3] Outside of his consulting work, Stangle has served on several boards of directors, written journal articles and been a guest lecturer on antitrust damages.
[1] At the end of tenure as trustee, the college established the "Stangle Award" for alumni who contribute to professional development of Bates graduates.