Contacts in the Office of Pesticide Programs, Antimicrobial Division

The Antimicrobials Division (AD) is responsible for all regulatory activities associated with antimicrobial pesticides and pesticide devices, including product registrations, amendments, and reevaluation (data call-ins, reregistrations, registration review).

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Name E-Mail Phone Area of Responsibility

Immediate Office: 703-308-6411 
Fax: 703-308-6437

Steve Knizner 703-347-8138 Director
Vacant     Deputy Director
Diane Isbell 703-308-8154 General registration questions, treated articles, pesticide devices

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Risk Assessment & Science Support Branch (RASSB)
Fax: 703-308-6467

Steven Weiss 703-308-8293 Branch Chief
Laura Parsons 703-305-5776 Associate Branch Chief
Timothy Leighton 703-305-7435 Human Exposure, Assessment and Risk Characterization
Donna Randall 703-605-1298 Environmental Exposure Assessment and Risk Characterization
Tim McMahon 703-308-6342 Senior Scientist Toxicology, Risk Assessments

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Product Science Branch 
Fax: 703-308-6467

Emily Mitchell 703-308-8583 Branch Chief
Mark Perry 703-308-8024 Team Leader Efficacy Evaluation Team Efficacy and Public Health Protocol Review
Karen P. Hicks 703-308-8417 Team Leader Toxicology/ Chemistry Team Product Chemistry and Acute Toxicology Review

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Regulatory Management Branch I 
Fax: 703-308-6467

John Hebert 703-308-6249 Branch Chief
Eric Miederhoff 703-347-8028 Team Leader PM Team 31 Quaternary ammonium, Compounds, Ethylene Oxide
Julie Chao 703-308-8735 Team Leader PM Team 33 Antifoulants, Copper, Silver, Peroxy and Zinc compounds, MBT, Nabam, Gluteraldehyde, Isothio zoline-ones, Formaldehyde

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Regulatory Management Branch II  Fax: 703-308-8481

Rose Kypianou 703-305-5354 Acting Branch Chief
Demson Fuller 703-308-8062 Team Leader PM Team 32 Sodium and Calcium Hypochlorite, Iodine, Bromine and Water Purifiers, Devices and Device Determinations
Jacqueline Hardy 703-308-6416 Team Leader PM Team 34 Wood preservatives, Phenolic Compounds, Pine Oils, Design for the Environment
Jose Gayoso 703-347-8652 Acting Team Leader PM Team 36  (Reevaluation): Registration Review, Reregistration Eligibility Decisions (REDs), Data Call-Ins (DCIs), Product Reregistration

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