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Medical Leadership

Medical Leadership is more than just an operational model: it’s central to our core values. Our board-certified and fellowship-trained Pathologists, Laboratory Scientists and Technicians promote and exceed the highest standards of patient service to the providers and patients we serve.

Dedicated COVID-19 Task force

Leading physicians (MD) and scientific (PhD) advisors 
guiding our test development and platform strategy.



 Sonic Healthcare USA Medical & Scientific Advisors



Joseph Aoki, MD
Senior Vice President, Population Health


Sonic Healthcare USA


 Austin, TX 


Joel Bentz, MD, FCAP 


WestPac Labs


Santa Fe Springs, CA 


Anthony Carter, PhD


Sonic Reference Laboratory


Austin, TX 


Owen Chan, MD, PhD
Medical Director


Clinical Labs of Hawaii


Aiea, HI 


Bijaya Dhakal, PhD, D(ABMM)
Scientific Director


Molecular Laboratory

Sonic Reference Laboratory


Austin, TX 


Matthew Dress, MD, FCAP 
Medical Director


American Esoteric Laboratories


Memphis, TN 


Catherine Dumur, PhD, HCLD (ABB) Director of Molecular Diagnostics


Bernhardt Laboratories


Jacksonville, FL 


Nathan Horton, PhD
Scientific Director


Core Laboratory

Sonic Reference Laboratory


Austin, TX 


Nicole Hubbard, MD, FASM, FCAP, FASCP
Medical Director of
Infectious Disease Pathology


 ProMedica Pathology Laboratories


Lima, OH 


John Hughes, MD
Medical Director


 LMC Pathology Services


Las Vegas, NV 


Krishna Maddula, PhD
Director, R&D Genomic Analysis


Sonic Reference Laboratory


Austin, TX 


Zoltan Nagymanyoki, MD, PhD
Medical Director


WestPac Labs


Santa Fe Springs, CA 


Walther Pfelfer, MD, FCAP, FASCP 
Medical Director, Northeast Division


East Side Clinical Laboratory
Sunrise Medical Laboratories


Providence, RI 


Mark Silberman, MD
Medical Director


Clinical Pathology Laboratories


Austin, TX 



Industry Leaders

Dedicated COVID-19 Task Force with physician (MD) and scientific (PhD) advisors.



  • Trusted Laboratory Partner with State/Federal
    Agencies and Private Enterprises
  • Medical Leadership
  • Excellence in Patient Care
  • Local Community-Based and Reference Lab Testing Services
  • NIH RADx-ATP Awardee
  • Comprehensive Testing Capabilities
  • Unparalleled COVID-19 Testing Network,
    Turnaround Time, and Capacity