CTIC Staff

Hans Kok
Hans Kok, Ph.D., CCA
Senior Project Director

Dr. Hans Kok is a Senior Project Director based out of Indianapolis. Hans was one of the founding members of the Indiana Conservation Cropping Systems initiative, and helped launch the Soil Health Partnership. Dr. Kok received Bachelors in Environmental Science and Masters in Agricultural Engineering degrees from the Agricultural University in The Netherlands, and a Ph.D. in Agricultural Engineering from the University of Idaho. He has written numerous soil and water conservation extension publications, educational materials, and refereed journal articles.

Dave Gustafson
Dave Gustafson
Interim Executive Director

Dr. Dave Gustafson is an independent scientist, now serving for the second time as CTIC's interim executive director and in various other roles on multiple CTIC projects, drawing upon his experience in predictive modeling and data analysis. He is a past CTIC Board Chair and had agribusiness experience with Monsanto, Rhone-Poulenc and Shell, as well as his current work at the Agriculture & Food Systems Institute and WSU. Educated as a chemical engineer, Dave holds a BS from Stanford and a Ph.D. from the University of Washington.

Steve Werblow
Steve Werblow
Communications Director

Steve Werblow has worked with CTIC since the early ‘90s, helping promote conservation practices across the country. A graduate of Cornell University’s College of Agriculture and Life Sciences, Steve is a four-time American Agricultural Editors Association Writer of the Year, award-winning photographer, and self-described "soil hugger.” He is based in Ashland, Oregon, and has covered agricultural stories on six continents for a wide range of farm magazines.

 
Crystal Hatfield
Crystal Hatfield
Operations Director

Crystal is responsible for the overall administration. Crystal also handles memberships, sponsorships, and tour registrations. Crystal assists the executive director with all other day to day operations. Crystal joined CTIC in the fall of 2014.

Sue Tull
Sue Tull
Project Director

Sue joined CTIC in 2013. She works with multiple projects and partners and also assists CTIC staff with events, communications and administration. Sue spent most of her career in plant breeding research as a soybean technician and plant pathology lab manager. She has also worked with two Soil and Water Conservation Districts in Indiana, as a district technician and urban conservationist.

Callie Cleveland
Callie Cleveland
Communication & Events Director

Callie joined the CTIC team in 2019. She is the communications and events director- developing effective messaging and communication strategies to promote CTIC's brand. Callie is a 2016 graduate of Purdue University where she graduated with a degree in animal sciences and agribusiness. She has also worked in the livestock industry and enjoys going to pig shows in her free time with her family.