Illinois Chapter of the IAAO

The Illinois Chapter of IAAO is a non-profit, educational organization with a mission to promote professional development in assessment administration and property valuation by providing educational opportunities throughout Illinois.  We are a professional membership organization of government assessment officials and others interested in the administration of the property tax in Illinois. Our parent association, the International Association of Assessing Officers (IAAO) is the internationally recognized global leader and preeminent source for innovation, education and research in property appraisal, assessment administration, and property tax policy.

IAAO Illinois Chapter Executive Officers


Chesney M. Leafblad, CIAO-M

Warren Township Assessor’s Office



Mark D. Armstrong, CIAO-M

Kane County Assessment Office



Timothy A. Jorczak, CAE, AAS, CIAO

City of Bloomington Township Assessor’s Office



Ronald A. Kane, CIAO-I

Ogle County Assessment Office


Immediate Past President

Dale D. Butalla, CIAO-M

Joliet Township Assessor’s Office

Executive Committee Member at Large

Sam Pintacura, CMS, GISP, CIAO

Kane County GIS


Executive Committee Position #1

Warren L. Dixon III, CIAO

Naperville Township Assessor’s Office


Executive Committee Position #2

Brent D. Dornon, RES, AAS, CIAO

Tyler Technologies


Executive Committee Position #3

Jennifer Campbell, CIAO

Logan County Assessment Office

IAAO Illinois Chapter Executive Board

Inaugural Executive Board Meeting (Pictured L to R: Josh Barnett, Education Advisory Member; Chesney Leafblad, Vice President; Adrianne Bailey, Education Advisory Member; Tim Jorczak, Secretary; Dale Butalla, President; Mark Armstrong, Member at Large; Brent Dornon, Region 2; Jason LeMar, Region 3. Not Pictured: John Barrington, Region 1; Ronald A. Kane, Treasurer)

Brent Dornon IAAO charter
Founding member and Region 2 representative Brent Dornon accepts the chapter's charter from IAAO President Dorothy Jacks.
IAAO Illinois chapter

Chapter display at 2019 IPAI Spring Conference in Normal.

Class Cancellation Policy: Cancellations after the Chapter has committed to the course with the facility, the instructor, or course materials are subject to a cancellation fee. That fee at the minimum covers the costs the Chapter will incur based upon the loss to the Chapter. No cancellation fee will be awarded if notice was not received three days prior to the beginning of class.

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