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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

Kamarrie Coleman

Interim Director

Elisa Rucker

Portfolio Manager

Ashley Kitchen

Senior Evaluation Specialist,

Outcome Measurement Portfolio

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Stella’s specialty in culturally tailored evaluation projects has continued to grow with ACET during her 25-year career as president of ACET, Inc. She has a M.S. in Policy Analysis and Program Evaluation.

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


Elisa has worked in management for over 25 years with proven customer service, application of data-driven strategies, quality compliance, and project management experience. She has a B.A. in Business Administration with a concentration in Finance.

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Ashley’s experience in collaborations with Black, Indigenous, and People of Color (BIPOC) communities strengthens ACET’s high-quality qualitative research. She has a Ph.D. in Politics and International Relations.

Rachel Engh

Senior Evaluation Specialist,

Collaborative Design Portfolio

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Rachel’s specialty in designing participatory and equitable mixed-methods evaluation approaches, helps clients understand and communicate impact. She has a M.A. in Urban and Regional Planning.

Charles Rivers

Community-Based Engagement Specialist


Charles’ expertise lies in supporting organizations with their Diversity, Equity, and Inclusion journeys, as well as Consulting and Facilitation. He holds a M.A. in Human Resource Development and a B.A. in Applied Ethics and Anthropology.

Megan Pinkowski

Event Training and Technical Assistance (ETA) Specialist


Megan has a background in project implementation and new client support, as well as customer relations support for B2B and B2C channels.She has a B.A. in global business and a minor in psychology.

Mick Alvarez Flores

Senior Graphic Design

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Mick’s background in graphic design and illustration, brings their expertise in digital and print media, visualizing and creating graphics, illustrations, logos, layouts and photos. They has a B.A. in Graphic Design.

Will Hopkins

Data Coordinator

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Will’s experience in data collection, analysis, quality improvement, and presentation is beneficial to a variety of ACET projects. He holds a B.A. in Urban Studies. 

Barbara Tan

Data Coordinator

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Barbara specializes in research and statistics, particularly in academic and healthcare settings, to support data analysis and collection. She has a B.S. in Biology and Psychology with a minor in Spanish.

Conor Hanson

Data & Information Systems Coordinator


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

Merone Eshetu
Project Coordinator

Merone brings experience in public health and health equity, research, youth education, and community engagement.  She has a B.A. in Public Health Studies with a focus in mental health. 

Emily Serkaian

Finance & Human Resource Coordinator

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Emily specializes in human resource administration, financial management, and organizational development. She earned a M.S. in Industrial and Organizational Psychology and a B.A. in both Economics and Management, and Psychology.

Bree Zimmerman

Project Assistant

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Bree specializes in facilitating and planning meetings, health and wellness events, with a focus on accessibility and disability services. She has a A.A. in Liberal Arts with an emphasis in Human Services.

Alessandra Rader

Project  Assistant


Alessandra brings experience with tracking information and communicating with a wide variety of stakeholders from the general public to congressional staff in previous positions. She has a B.A. in Anthropology and a minor in Spanish Studies.

Miranda Utz




Miranda brings experience in office settings to enhance business functions. She also has a strong background in guest services and guest relations to help teams connect with communities.

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