Maori and Pacific students generally do not attain the same levels of tertiary success as New Zealanders of European descent, particularly in science, technology, engineering, and mathematics (STEM) subjects. Te Ropu Awhina (Awhina), an equity initiative at Victoria University of Wellington in New Zealand between 1999 and 2015, aimed to produce Maori and Pacific professionals in STEM disciplines who contribute to Maori and Pacific community development and leadership. A hierarchical Bayesian approach was used to estimate posterior standardized completion rates for 3-year undergraduate and 2-year postgraduate degrees undertaken by non-Maori-Pacific and Maori-Pacific students. Results were consistent with an Awhina effect, that is, Awhina's positive influence on (combined) Maori and Pacific success.