Our Team

Executive & Leadership

Chris Guinty, J.D.President & CEO
Jenny JohannessonManaging Director
James MillerChief Financial Officer
Mark BockelmanChief of Special Projects
Ben MosierHIWU Executive Director
Michelle DorseyVice President of Amateur Sport
Trent GodfreyVice President of Professional Sport & US Anti-Doping Business Development
Darius KaziukenasVice President of Network
J.D. Matheus, MAVice President of Professional Sport
Josh MittlestadtVice President of Information Technology
Christian NilssonVice President of International Federations / NADOs
Tudor PopaVice President of International Business Development
Tim UryaszVice President of Quality Assurance
Ryan WillisVice President of Professional Football Operations
Sarah ZiegelmannVice President of Healthcare Services

Amateur Sport

Saeed HalimDirector of Amateur Sport
Michaela Stemmons, MA, ATCAmateur Sport Senior Program Manager
Austin AcostaAmateur Sport Program Manager
Coulter StraussAmateur Sport Program Manager

Business Development

Richard LewisDirector of Business Development, Healthcare Services
Sofie SibiaDirector of Business Development, International Healthcare Services
Marija TabasDirector of Business Development, International Healthcare Services
Chris WalkerDirector of Business Development, Healthcare Services


Anna BottomsEducation Senior Program Manager
Megan MeyerEducation Program Manager


Bethany GrahamController
Allison Lathim, M.Ed.Senior Accounting Manager
Johanna BenktanderInternational Finance Manager
Rojda AksoyInternational Finance Assistant

Healthcare Services

Krysti Green, MSDirector of Healthcare Services
Jennifer BrownHealthcare Services Program Manager
Kinzel RonyHealthcare Services Program Manager

Horseracing Integrity & Welfare Unit (HIWU)

Kate MittelstadtHIWU Chief of Operations
Michelle Pujals, Esq.HIWU General Counsel
Mary Scollay, DVMHIWU Chief of Science
Ed ArriolaHIWU Investigator
Kayla AustinHIWU Communications Design Manager
Michael BeissenherzHIWU Director of Testing Strategy
Brian BennettHIWU Investigator
Terese CabantingHIWU Training & Certification Manager
Zach CerianiHIWU Investigations Counsel
Katie CrouseHIWU Legal Specialist
Wally FairchildHIWU Senior Director of Testing Operations
Allison Farrell, Esq.HIWU Senior Litigation Counsel
Kelly GilbaneHIWU Administrative Assistant
Geneva Gnam, Esq.HIWU Litigation Counsel
Dirk HuntHIWU Director of Laboratory Accreditation
Stephanie IsleyHIWU Director of Compliance & Policy
Stephanie JensonHIWU Director of Education
Kyle KremersHIWU Assistant General Counsel
Gabrielle KrysiewiczHIWU Results Coordinator
EJ LauterHIWU Investigative Analyst
Shannon LeeHIWU Testing Operations Manager
Kitt LeeHIWU Results Manager
Shawn LoehrHIWU Director of Investigative Operations
Patti Marquis, DVMHIWU Director of Equine Medical Resources
Lorena MartinezHIWU Assistant Director of Compliance & Support
Susan MegeeHIWU Laboratory Manager
Brittany NewbyHIWU Testing Operations Coordinator
Tammy O’Hara, Esq.HIWU Litigation Counsel
Marcy ParkerHIWU Testing Operations Senior Manager
Greg Pennock, Sr.HIWU Investigator
Monica PilarskiHIWU Legal Specialist
Alexa RavitHIWU Director of Communications & Outreach
Shaun RichardsHIWU Director of Intelligence & Strategy
Mo SablaHIWU Product Manager
Jared ShaferHIWU Testing Strategy Manager
Melissa StormerHIWU Investigative Analyst
Richard ThomasHIWU Investigator
Mike ThompsonHIWU Director of Training & Certification

Human Resources

Andrayana Estes, MA, SHRM-CP, CMPDirector of Human Resources

Information Technology

Phillip DuganIT Systems Support Administrator
John TotzkeIT Systems Support Administrator
Chelsea ScrogginsHIWU IT Support Specialist

International Doping Tests & Management (IDTM)

Mikel AcedoInternational Federations Program Manager
Krisztina CsokeInternational Federations Program Manager
Crista DavisInternational Federations/TUE Senior Program Manager
Dean EhrlichInternational Federations Program Manager/Results Management
Victoria GrasbonInternational Federations Senior Program Manager
Jayde HargreavesInternational Federations Program Manager
Ighodaro IwekaInternational Federations Program Manager
Chris MeyerGerman NADA Program Manager
Lily MosaTUE Administrator
Thomas MoschnerDirector of International Quality Assurance and German NADA Program
Fabian PilsetnekLogistics Coordinator
Michele RigsbyInternational Federations Program Manager
Marcus SaarinenTUE Administrator
Neal SoderstromInternational Federations Senior Program Manager
Jitong SunTUE Administrator
Mariangela VikstromInternational Federations Program Manager Assistant
Shanshan XieInternational Federations Program Manager Assistant


Gatis BerkisDirector of International Network
Cara ThompsonDirector of US Network
Momoko KanekoInternational Network Program Manager
Justin GoreUS Network Program Manager

Professional Sport

Daryl Dingle, MSSenior Director of NFL SOA
Rachel WadkinsSenior Director of NFL PES
Luis PeralesDirector of Professional Sport
Jennifer FoleyDirector of Professional Sport
Hanah CerkoneyProfessional Sport Senior Program Manager
Matthew RuderProfessional Sport Senior Program Manager
Mallory KoenigProfessional Sport Senior Program Manager
Laura JonahProfessional Sport Program Manager
Gunner HalterProfessional Sport Program Manager
Alex SierensProfessional Sport Program Manager
Carter MelchiorProfessional Sport Program Manager
Emma BeardenProfessional Sport Program Manager

Quality Assurance

Josh ScholtenQuality Assurance Program Manager