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The ACET Team

ACET is a woman- and minority-owned small business enterprise based in Minneapolis, Minnesota. Our staff have extensive experience in conducting high-quality research and evaluation in a variety of settings.


See the bios below to learn more about each ACET team member.

Stella SiWan Zimmerman

President, Founder,
Chief Executive Officer


Stella has completed many culturally tailored evaluation projects during her 23-year career as president of ACET. She has a master's degree in Policy Analysis and Program Evaluation.

Jolene Roehlkepartain



Jolene has more than 35 years of expertise in strategic communication, developing dissemination plans and creating social-media campaigns. She has a bachelor's degree in Communications and English.

Ashley Kitchen

Evaluation Specialist,

Quality Improvement Lead

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Ashley has experience in conducting high-quality qualitative research with Tribal organizations and BIPOC populations. She has a Ph.D. in Politics and International Relations.

Rachel Engh

Evaluation Specialist,

 Cross-sector Lead

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Rachel designs participatory and equitable mixed-methods evaluation approaches to help clients understand and comm-unicate impact. She has a master's degree in Urban and Regional Planning.

Lisa Perkins Smith

Operations Specialist,

 Strategy Lead

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Lisa's expertise focuses on implementing internal initiatives, assisting with
data-collection efforts, and graphic design. She has a bachelor's degree in
English and Elementary Education.

Amy Gustafson


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Amy facilitates, coordinates, and delivers data-related tasks. She specializes in working on both quantitative and qualitative data. She has a bachelor's degree in Biomedical Engineering.

Mick Alvarez Flores

Graphic Designer


Mick’s focus is in graphic design and illustration, creating a variety of
images for use in print
and digital media. She has a bachelor’s degree in Graphic Design.

Isaac Ezra Jennings


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Isaac’s background is in operations management, logistics, program development, and community relations. He is working toward a master’s degree in Public and Nonprofit Administration.

Carlos Gallego



Carlos does community, grassroots work, and he builds cultural connections with underserved communities. He has a master’s degree in Elementary Education.

Trisha Netsch López

Junior Research Associate

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Trisha has a 9-year career of conducting qualitative research on culturally and linguistically appropriate policies. She is finishing her Ph.D. in anthropology and a master's degree in Public Health.