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Our Staff, Board of Directors, and the Education Team

We work to nurture connections between plants and all people, past and present, in an inspiring natural setting that invites discovery. Our employees, Board of Directors, and Education Team make our operations and programs possible.

  • Mike Cooper, Executive Director
  • Cindy Hulstein, Wedding & Event Coordinator
  • Lori Sheldon, Administrative Assistant 
  • Natalie Sorenson, Education & Social Media Coordinator 

Wegner Arboretum Society Board of Directors

Our board represents a cross-section of our community and has a passion for our organization and those we serve. The members work hard to ensure long-term sustainability of the organization.

  • Mike Cooper, Executive Director 
  • Sue Aguilar, Board President
  • David Rezac, Vice President
  • Michelle Erpenbach, Secretary
  • Ben Arndt , Treasurer
  • Mike Crane
  • Heather Kittelson
  • Dr. Ann Wilson 
  • Ann Kolbrek 
  • Paul DeJong 
  • Dick Dempster
  • Don Kearney, Director Sioux Falls Parks and Recreation 
  • Scott Anderson, Minnehaha County Planning Director
  • Duane Stall, Forestry Supervisor, City of Sioux Falls, Advisory

Mary Jo Wegner Arboretum Society Board Committees

Education Committee

This group of educators formulated our mission statement for the Mabel & Judy Jasper Educational Center: Guests will gain an appreciation of nature and local history while developing a personal, direct, and life-long relationship to the land through formal and informal education and activities.

  • Ann Kolbrek, Chairperson
  • Paul DeJong
  • Ann Wilson  

Governance Committee

David Rezac (Chair)
Sue Aguilar
Ben Arndt
Mike Crane
Michelle Erpenbach
Don Kearney
Dominic Walkes

Development Commitee

Mike Crane (Chair)
Ben Arndt
Heather Kittelson
Don Kearney
Paul DeJong
Jessica Wells (Non-board member)

Building & Grounds Committee

Scott Anderson (Chair) 
Dick Dempster 
Paul DeJong

Steve Sikorski (non-board member)
Gregg Johnson (Non-board member)
Ann Randall (Non-board member)
Mary Ellen Connelly (Non-board member)