Executive Board

Bonnie MacCulloch is a Regulatory Scientist with knoell USA and has experience supporting pesticide registration under FIFRA, environmental risk assessment, ecotoxicology study monitoring, and seed treatment technology. Prior to joining knoell USA Bonnie has worked with both Federal and State agriculture agencies, universities and industry partners in the area of integrated pest management, plant protection, and entomology. She has served as program leader for State pest survey and detection activities focused on new and emerging insect and plant pests. She has also collaborated on Sustainable Agriculture Research and Education Program Grants to implement native bee management practices with local professional farmers. 

Bonnie has a Master of Science degree in Environmental Forest Biology with a concentration in Entomology from the State University of New York, College of Environmental Science and Forestry.

Bonnie MacCulloch
Phone: +1 610 558 3001 Ext. 129
Fax: +1 610 558 6025
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Dr. Elizabeth “Beth” Dederick is Vice President of Industrial Chemicals and Biocides for knoell USA. Beth is a subject matter expert in US and international regulatory affairs with specific experience in TSCA, EU REACh, and GHS. She has presented on these topics at numerous conferences around the world, held training sessions, and co-authored peer-reviewed publications. Beth is a member of the Board of Directors for the Society for Chemical Hazard Communication.
Prior to joining knoell USA, Beth worked for ICF International and the LifeLine Group. In addition, Beth owned and operated her own consulting company. Beth holds a PhD in Environmental Health Policy and Management and a Master’s degree in Environmental Health Science from the Johns Hopkins Bloomberg School of Public Health.

Elizabeth Dederick
Phone: +1 610 558 3001 Ext. 102
Fax: +1 610 558 6025
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The knoell network: worldwide experts

We offer a comprehensive, modular service portfolio based on the unique "Glocal Concept": worldwide industry sector know-how with experience in the key global markets – and local presence at your company. Discover the knoell network: