We’re a design and planning firm dedicated to creating better architecture in our own backyard.
CO-OP was born in 2012, on the first of June, with just a handful of us between Aberdeen and Sioux Falls. Rapid City came along in 2016, and Sioux Center in 2024. Today we’re a group of 30 or so Midwesterners with a simple shared vision: to make life better in our communities.
The name CO-OP is a tribute to the cooperation that underpins life in the heartland. Our firm designs all manner of architecture, save for single family homes and multi-family/developer stuff. We don’t really do that. But we do schools, offices, downtown mixed-use, restorations, civic/public work, and the like. We also do interior design and master planning. We once did a 1/3 scale pirate ship. We don’t do pirate ships anymore.
We want to help define South Dakota architecture. To celebrate our history and pragmatic roots but challenge the status quo. We want our communities to really thrive. We want better architecture in our own backyard.
You can learn a thing or two about each of us below. We’re always on the lookout for more talented folks, so if you’re interested in joining our effort, click here and tell us about yourself.
We’re a design and planning firm dedicated to creating better architecture in our own backyard.
CO-OP was born in 2012, on the first of June, with just a handful of us between Aberdeen and Sioux Falls. Rapid City came along in 2016. Today we’re a group of 30 or so Midwesterners with a simple shared vision: to make life better in our communities.
The name CO-OP is a tribute to the cooperation that underpins life in the heartland. Our firm designs all manner of architecture, save for single family homes and multi-family/developer stuff. We don’t really do that. But we do schools, offices, churches, restorations, civic/public work, and the like. We also do interior design and master planning. We once did a 1/3 scale pirate ship. We don’t do pirate ships anymore.
We want to help define South Dakota architecture. To celebrate our history and pragmatic roots but challenge the status quo. We want our communities to really thrive. We want better architecture in our own backyard.
You can learn a thing or two about each of us below. We’re always on the lookout for more talented folks, so if you’re interested in joining our effort, click here and tell us about yourself.

Thomas Hurlbert
Founding Principal | Sioux Falls
Education
Bachelor of Environmental Design – Montana State University
Master of Architecture (w/honors) – Montana State University
Professional Experience
CO-OP Architecture – Aberdeen, Sioux Falls, Rapid City, SD, Sioux Center, IA
Hula Design/Build – Aberdeen & Sioux Falls, SD
Koch Hazard Architects – Sioux Falls, SD
Martin E. Rich Architects – New York, NY
Professional Affiliations
AIA, LEED AP, Green Globes, NCARB (SD, IA, ND, MN)
AIA South Dakota (Past President, Advocacy/Licensing Adviser, & Secretary/Treasurer)
Trustee (President) – South Dakota State Historical Society
Friends of South Dakota Public Broadcasting Board
SculptureWalk of Sioux Falls Board
2021 Sioux Falls Redistricting Commission (Central District Representative)
2019 Sioux Falls Events Campus Study Group
Sioux Falls Main Street B.I.D. Board (Past-Chair)
Sioux Falls Catholic Diocese Building Committee Board
Sioux Falls Building Appeals Board
McKennan Park Neighborhood Association (Past President)
Sioux Falls Downtown Rotary
Aberdeen Downtown B.I.D. Board
Montana State University Architectural Advisory Committee
SDSU School of Arch Professional Advisory Committee
Avera St. Luke’s Hospital Advisory Board
Aberdeen Habitat for Humanity Board
Dakota Rising Fellowship Alumni
Leadership South Dakota
D.A.R.T. (Downtown Aberdeen Revitalization Team)
The Rock Garden Tour on SDPB Radio – (Oil Can)
Awards & Recognitions
2018 AIA National Young Architects of the Year Award
2022 AIA SD President’s Award
Credentials

Kyle Raph
Founding Principal | Sioux Falls
Education
Master of Architecture – University of Nebraska
Bachelor of Architectural Studies – University of Nebraska
Professional Experience
CO-OP Architecture, Sioux Falls, SD
Koch Hazard Architects, Sioux Falls, SD
Architectural Concepts, Sioux Falls, SD
Professional Affiliations
Downtown Sioux Falls Design Committee
Sioux Falls State Theater Company
Credentials

Brian Skrovig
Associate Principal | Sioux Falls
Education
Master of Architecture – South Dakota State University (2016)
Bachelor of Science in Architectural Studies – South Dakota State University (2014)
Professional Experience
Principle Architect – CO-OP Architecture – Sioux Falls, SD (2022 – Present)
Architect – Pickard Chilton Architects (2016 – 2022)
Teaching Assistant – SDSU DoArch (2014 – 2016)
Summer Architectural Internships (2012 – 2015)
Professional Affiliations / Community Groups
AIA, NCARB
Credentials

Jared Carda
Associate Principal | Rapid City
Education
Master of Architecture – University of Nebraska
Bachelor of Architectural Studies – University of Nebraska
Professional Experience
Architect Intern – Schlimgen Design – Rapid City, SD
Bricktender Foreman – S & S Masonry – Wagner, SD
Shop Attendant – UNL Architecture Shop – Lincoln, NE
Framer – Scott Martin Construction Inc. – Rapid City, SD
Buyer/Planner – Novartis Consumer Health – Lincoln, NE
Credentials

Jason Kann
Associate Principal | Sioux Falls
Education
Master of Architecture – North Dakota State University (2009)
Bachelor of Environmental Design – North Dakota State University (2008)
Professional Experience
CO-OP Architecture – Sioux Falls, SD (Present)
TSP, Inc. – Sioux Falls, SD (2014 – 2019)
Wold Architects and Engineers – St. Paul, MN (2013 – 2014)
IKEA (Business Planner/Kitchen Designer) – Salt Lake City, UT & Minneapolis, MN (2009 – 2013)
Affiliations
AIA, NCARB (SD, MN)
ALEP
Leadership South Dakota (2025)
Leadership Sioux Falls (2023)
Leadership Watertown (2018)
Watertown Lions Club
Credentials

Spencer Sommers
Associate Principal | Aberdeen
Education
Master of Architecture – South Dakota State University (2017)
Bachelor of Science in Architectural Studies – South Dakota State University (2015)
Construction Minor – South Dakota State University (2015)
Professional Experience
Associate Principal Architect – CO-OP Architecture, Aberdeen, SD (2023 – Present)
Design Architect – CO-OP Architecture, Aberdeen, SD (2017-2023)
Adjunct Instructor – SDSU Department of Architecture, Brookings, SD (2017, 2022, 2023)
GA / Instructor – SDSU School of Design, Brookings, SD (2015-2017)
Student Intern – CO-OP Architecture, Aberdeen, SD (2012-2017)
Professional Affiliations
4 Under 40 Recipient – Aberdeen Area Chamber of Commerce (2022)
8 80 Cities & Knight Foundation – Emerging City Champion (2019)
AIA, NCARB
Aberdeen Area Chamber of Commerce – Board of Directors
Aberdeen Area Arts Council – Board of Directors
Aberdeen Design & Appearance Committee
Aberdeen Development Corporation – Board of Directors
Aberdeen Downtown Association/BID – Board of Directors (Past-President)
Downtown Aberdeen Parking Board
Emerging Leader – Community Champions Awards (2022)
Enhance Aberdeen Committee
Homes Are Possible Incorporated – Board of Directors
Leadership Aberdeen – Class of 2018
Leadership South Dakota – Class of 2021
Signs of the Times (Historic Downtown Advertisement Restoration)
South Dakota State University Alumni Association – Board of Directors (District 6)
Credentials

Aaron Ashley
Project Manager
Education
A.A.S. Computer Aided Design – Western Dakota Tech (2009)
Professional Experience
CO-OP Architecture – Rapid City, SD (2021 – Present)
ARC International, Rapid City, SD (2019 – 2021)
Chamberlin Architects, Rapid City, SD (2018 – 2019)
ARC International, Rapid City, SD (2009 – 2018)
Credentials

Alison Bren
Accountant
Education
B.S. in Accounting – Minnesota State University Mankato (2021)
Professional Experience
CO-OP Architecture – Sioux Falls, SD
HorsePower Brands – Omaha, NE
Credentials

Anthony Dyk
Architectural Associate / Model Shop Manager
Education
Master of Architecture – South Dakota State University (2016)
Bachelor of Science in Architectural Studies – South Dakota State University (2014)
Professional Experience
Architectural Associate / Model Shop Manager – CO-OP Architecture – Sioux Falls, SD (2019 – Present)
Architectural Graduate – TSP, Inc., Rapid City, SD (2017), Sioux Falls, SD (2017 – 2019)
Architectural Intern – TSP, Inc., Sioux Falls, SD (2016)
Professional Affiliations / Community Groups
Associate AIA
Credentials

Beau Norby
Architectural Associate
Education
Master of Architecture – North Dakota State University (2021)
Bachelor of Architecture – North Dakota State University (2020)
Professional Experience
CO-OP Architecture – Aberdeen, SD (Present)
JLG Architects – Fargo, ND (2019 – 2025)
Professional Affiliations / Community Groups
Associate AIA
Aberdeen Downtown Association – Board of Directors (Present)
Credentials

Becca Woytassek
Architectural Associate
Education
Master of Architecture – South Dakota State University (2022)
Bachelor of Arts in Architecture – South Dakota State University (2020)
Professional Experience
Architectural Designer – CO-OP Architecture (2022 – Present)
Graduate Teaching and Research Assistant – SDSU DoArch (2020 – 2022)
Student Intern – CO-OP Architecture (2018 – 2021)
Professional Affiliations / Community Groups
Associate AIA
Credentials

Cailyn Patterson
Graphic Designer
Education
B.F.A. Interior Design – South Dakota State University (2017)
Minors in Graphic Design, Studio Arts, & Film Studies – South Dakota State University (2017)
Professional Experience
CO-OP Architecture – Sioux Falls, SD (2025 – Present)
605 Magazine / 605 Creative Co. / 605 Weddings – Sioux Falls, SD (2021 – 2025)
Professional Affiliations / Community Groups
Sioux Falls Arts Council
American Advertising Federation (AAF-SD)
Credentials

Christin Wiebe
Project Manager
Education
A.A.S. Computer Aided Design – Western Dakota Tech
B.S. Interior Design – Oregon State University
B.S. Housing Studies – Oregon State University
Professional Experience
Project Technician – CO-OP Architecture – Rapid City, SD
CAD Tech Intern – CO-OP Architecture – Rapid City, SD
3D Generalist Intern – RFA Engineering – Rapid City, SD
Planner/Project Coordinator/CAD – Sundeleaf & Associates – Portland, OR
Credentials

Cory Bleyenburg
Project Director
Education
Architectural Engineering – Southeast Technical Institute
Professional Experience
CO-OP Architecture, Sioux Falls/Aberdeen, SD
Koch Hazard Architects, Sioux Falls, SD
Award
2025 AIA SD Associate Award 2025
Credentials

Guillermo Cebrian
Project Architect
Education
Master of Architecture – South Dakota State University (2021 – 2022)
Porto Academy Summer School Graduate – University of Porto, Portugal (2016)
Bachelor of Fine Arts in Architecture – South Dakota State University (2014 – 2017)
Professional Experience
Architectural Associate – CO-OP Architecture – Sioux Falls, SD (2023 – Present)
Architectural Designer – Koch Hazard Architects – Sioux Falls, SD (2018 – 2021)
Architectural Summer Intern – Koch Hazard Architects – Sioux Falls, SD (2017, 2021, 2022)
Graduate Teaching Assistant – South Dakota State University (2021 – 2022)
Undergraduate Research Assistant – South Dakota State University (2016 – 2017)
Professional Affiliations / Community Groups
Associate AIA
AIASD Convention Committee
AIASD Emerging Professionals
Credentials

Jillian Timm
People & Operations Coordinator
Education
B.S. Psychology – Minnesota State University Mankato (2022)
Professional Experience
CO-OP Architecture – Sioux Falls, SD
Southwest Metro Intermediate District 288 – Shakopee, MN
Credentials

Justin Kautz
Associate Planner
Education
B.A. English – Augustana University (2018)
B.A. Economics – Augustana University (2018)
Professional Experience
CO-OP Architecture – Sioux Falls, SD
Sanford Health – Sioux Falls, SD
Fernson Brewing Company – Sioux Falls, SD
Encyclopedia Britannica – Chicago, IL
Professional Affiliations
Association for Learning Environments (A4LE)
Associate AIA
Credentials

Justin VanMaanen
Project Manager
Education
Architectural Engineering Associate Degree – Southeast Technical Institute
Professional Experience
CO-OP Architecture – Sioux Falls, SD
Hula Design/Build – Sioux Falls, SD
Koch Hazard Architects – Sioux Falls, SD
Credentials

Justine Anderson
Architectural Drafter
Education
Architectural Engineering – Southeast Technical Institute (2025)
Professional Experience
CO-OP Architecture – Sioux Falls, SD
Heyer Engineering – Sioux Falls, SD
Credentials

Kendra Hage
Project Architect
Education
Bachelor of Architecture (w/honors) – Iowa State University
Secondary Major in Environmental Studies – Iowa State University
Professional Experience
CO-OP Architecture – Sioux Falls, SD
EAPC Architects Engineers – Sioux Falls, SD
Professional Affiliations
AIA, NCARB (SD, IA)
Credentials

Kylie Hetley
Architectural Intern
Education
B.A. in Environmental Design – Montana State University (2023-Present)
Professional Experience
CO-OP Architecture – Rapid City, SD (2025-Present)
Credentials

Mitchell Woldt
Project Architect
Education
Master of Architecture – South Dakota State University (2021)
B.F.A. in Architectural Studies – South Dakota State University (2019)
Professional Experience
Architectural Associate – CO-OP Architects, Rapid City, SD
Planning & Zoning Specialist – City of Sioux Falls Planning & Development, Sioux Falls, SD
Project Associate – JLG Architects, Sioux Falls, SD
Architectural Intern – JLG Architects, Sioux Falls, SD
Research Assistant – SDSU Department of Architecture
Professional Affiliations
AIA, NCARB
Credentials

Molly Tschetter
Interior Designer
Education
Bachelor of Arts & Sciences in Interior Design – South Dakota State University
Entrepreneurial Studies Minor – South Dakota State University
Professional Experience
Interior Designer – CO-OP Architecture, Sioux Falls & Rapid City, SD
Interior Design Associate – Interstate Office Products, Sioux Falls, SD
Professional Affiliations
IIDA
NCIDQ #501224
Credentials

Nate Krueger
Architectural Associate
Education
Master of Architecture – South Dakota State University (2022)
B.A. in Architecture – South Dakota State University (2020)
Professional Experience
Architectural Associate – CO-OP Architecture (Present)
Architectural Designer – PLaN Architecture (2022 – 2025)
Graduate Teaching Assistant – SDSU DoArch (2020 – 2022)
Student Intern – CO-OP Architecture (2021)
Student Intern – Koch Hazard Architects (2020)
Student Intern – Allers Associates Architects (2019)
Professional Affiliations
Associate AIA
Credentials

Shawna Thomsen
Interior Designer
Education
B.F.A. in Interior Design – South Dakota State University (2024)
Studio Arts Minor & Art History Certificate – South Dakota State University (2024)
Professional Experience
Interior Designer – CO-OP Architecture (2024 – Present)
Student Intern – Architecture Incorporated (2023)
Professional Affiliations
Associate IIDA
Credentials

Steve Savonen
Senior Project Manager
Education
Master of Architecture – University of Minnesota Twin Cities
Bachelor of Arts in Architecture – University of Minnesota Twin Cities
Professional Experience
CO-OP Architecture – Aberdeen, SD (Present)
Apec International – Los Angeles, CA
New England Design and Construction – Boston, MA
Architects Rego & Youngquist – Minneapolis, MN
Vedi Associates – Minneapolis, MN
Meyer, Scherer & Rockcastle – Minneapolis, MN
Professional Affiliations
NCARB
Credentials

Taylor Schmitz
Interior Designer
Education
B.S. in Design: Interior Design – University of Nebraska-Lincoln (2026)
Architectural Studies Minor – University of Nebraska-Lincoln
Professional Experience
Interior Designer – CO-OP Architecture – Sioux Falls, SD (Present)
Student Intern – Houndstooth House – Sioux Falls, SD (2025)
Professional Affiliations
ASID
Credentials

Tessa Klarenbeek
Interior Designer
Education
B.F.A in Interior Design – South Dakota State University
Studio Art Minor – South Dakota State University
Professional Experience
Interior Designer – CO-OP Architecture, Sioux Falls, SD (2020 – Present)
Student Intern – CO-OP Architecture, Sioux Falls, SD (2019 – 2020)
Professional Affiliations
IIDA
NCIDQ #417584
Credentials

Tom Oster
Planner
Education
Ed. S. in Education Administration – University of South Dakota
Master of Arts in Secondary Administration – Northern State University
Bachelor of Science in Secondary Education – Northern State University
Professional Experience
Superintendent of Schools – Sioux Valley School District – Volga, SD (2011-2016)
Secretary of Education – State of South Dakota (2008 – 2011)
Senior Advisor – Council of Chief State School Officers (2011 – 2016)
Superintendent, High School Principal, Elementary School Principal – Avon School District – 18 Years
Athletic/Activities Director – served as President of State Activities Association – 25 Years
Member of Brown County Commission – Aberdeen, SD – 2 terms
City Council member in Avon, SD and member of St. Michaels Hospital Board of Directors in Tyndall, SD
Professional Affiliations
CEO and President of Oster Consulting LLC
Co-Founder and Director of Dakota Education Consulting
Credentials

Todd Abrahamson
Planner
Education
Certificate of Advanced Studies in Education Administration – Iowa State University
Master of Education – Iowa State University
B.A. Secondary Education – Buena Vista University
Professional Experience
Okoboji School District – Milford, IA (2016-2025)
Grinnell School District – Grinnell, IA (2011-2016)
Sigourney & Tri-County School Districts – Sigourney & Thornburg, IA (2010-2011)
Sigourney School District – Sigourney, IA (2009-2010)
Sigourney & Keota School Districts – Sigourney & Keota, IA (2006-2009)
West Central School District – Maynard, IA (2004-2006)
Professional Affiliations
Kiwanis Club
Credentials

Todd Geisler
Senior Architectural Drafter
Education
Associates Degree Industrial Technologies – Northern State University (2004)
Professional Experience
Senior Architectural Drafter – CO-OP Architecture, Aberdeen, SD (2022-Present)
Project Manager – HKG Architects, Inc., Aberdeen, SD (1999-2022)
Credentials

Trevor VanConant
Project Manager
Education
Architectural Engineering – Southeast Technical Institute
Professional Experience
Project Manager – CO-OP Architecture, Sioux Falls, SD (Present)
Project Manager – Koch Hazard Architects, Sioux Falls, SD (2013-2024)
Professional Affiliations
Associate AIA
Southeast Technical College Academic Advisory Board
Credentials

Wild Bill Hickok
Wiener Dog
Education
Non-traditional, from a cat named “Thunder Hawk”
Professional Experience
CO-OP Architecture – Aberdeen & Sioux Falls, SD (mostly Public Relations)
Credentials

