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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

Jolene Roehlkepartain

Senior Department Manager,

Program Services

Lisa Perkins Smith

Department Manager,

Operations & Strategy

Kamarrie Coleman

Department Manager,

Evaluation & Research

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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.

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Jolene has more than 35 years of expertise in strategic communication, facilitation, and bridging connections with clients and communities. She has a bachelor's degree in Communications and English.

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Lisa's expertise focuses on implementing strategic priorities, improving operations, and executing internal and external specialty initiatives. She has a bachelor's degree in English and Elementary Education.

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Kamarrie has extensive experience working with culturally and linguistically diverse PK-16 educational institutions. She has a Ph.D. in English as a Second Language Curriculum and Instruction.

Ashley Kitchen

Senior Evaluation Specialist,

Quality Improvement Lead

Rachel Engh

Senior Evaluation Specialist,

 Cross-sector Lead

Carlos Gallego

Senior Coordinator

Outreach and Cultural Connector

Mick Alvarez Flores

Graphic Design

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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.

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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.

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

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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.

Will Hopkins



Charles Rivers

Program Support Coordinator and Facilitator

Trisha Netsch Lopez



Maggi Seybold



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Will collects, analyzes, and presents data on a variety of projects, bringing experience in public health data use and quality improvement. He has a bachelor’s degree in Urban Studies.


Charles’ expertise lies in Diversity, Equity, and Inclusion, as well as Youth Engagement and Development. He holds a bachelor’s degree in Applied Ethics with a minor in Anthropology.


Trisha specializes in qualitative research methods and has extensive experience working with culturally appropriate health services. She has a Ph.D. in Anthropology and a master’s in Public Health. 

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Maggi formerly practiced as a Physician Assistant (PA) and brings a medical perspective to ACET while supporting both projects and operations. She has a master's degree in Physician Assistant Studies.

DeResha Vaughan


Barbara Tan


Bree Zimmerman

Assistant to

Operations Team

Conor Hanson

Research and Data



DeResha’s work experiences focus on creating greater organization and efficiency while utilizing her natural talent with technology. She has a bachelor’s degree in Classics.

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Barbara incorporates research and statistics, particularly in academic and healthcare settings, to support data analysis and collection She has a bachelor’s degree in Biology and Psychology with a minor in Spanish.

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Bree has experience facilitating a wide range of disability and accessibility support programs. She has her Associates in Liberal Arts with an emphasis in Human Services.


Conor specializes in data analysis using multiple programming languages to tell meaningful stories with data. He holds a bachelor’s degree in Philosophy and a certificate in Data Analysis & Visualization.

Max Davis



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Max analyzes data, coordinates data storage, and has experience conducting statistical analysis and research. He has a bachelor’s degree in Urban and Environmental Policy.