The University of Colorado Boulder's Center for STEM Learning (CSL)'s Transforming Education, Supporting Teaching and Learning Excellence (TRESTLE) was a seven- institution project funded by the National Science Foundation from 2015-2020. The TRESTLE project focused on increasing use of research-based instructional practices through embedded expertise within departments to support course redesign, examining how interventions can be scaled at different types of institutions, and the building of communities within and across campuses to increase the impact of course transformation. This case study details the professional development initiatives developed within TRESTLE at CU Boulder, providing an example of how offerings were tailored at one institution in order to meet TRESTLE’s cross-institutional objectives.