Meet Your Instructors


NancyM-226.jpgNancy Mueller, MPH
Director, Brown School Evaluation Center
Assistant Dean for Planning & Evaluation, Brown School

Nancy has over 20 years of experience in program and systems-level evaluation, strategic planning, and organizational leadership and performance management. As co-founder of the Center for Tobacco Policy Research, she led several large evaluation projects examining the effectiveness of public health interventions & policies in tobacco control and obesity prevention at the local, state and national levels.  She is a Leap of Reason Ambassador, an active member in a community of leaders who believe that mission and performance are inextricably linked. Nancy is committed to supporting non-profits on their journey to strengthening their performance and their impact on the communities they serve.

Meihsi Chiang, MSW
Evaluation Manager, Brown School Evaluation Center

Meihsi Chiang has a strong background in program evaluation, visual communication, and project management. She coordinates the Evaluation Center’s projects, with a focus on process and outcome evaluation, evaluation capacity, survey design, and data collection and analysis; she also co-manages the center’s brand and visual presence, including website design and marketing materials. Before joining the Evaluation Center, Meihsi was a child protection service social worker in Taiwan and has over 7 years of front-line experience working with disadvantaged children.


Liz Vestal, Evaluation CoordinatorLiz Vestal, MSW, LMSW
Evaluation Manager, Brown School Evaluation Center

Liz currently manages several projects for the Evaluation Center and is passionate about using data for the public good and about engaging the public and nonprofit sectors. She has experience with survey design, data analysis, facilitation, and strategic planning while working alongside partners in Michigan, California, and Missouri. With a curiosity for quality improvement and a deep commitment to equitable collaboration, Liz is emboldened to work alongside organizations to maximize their impact.