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Meet Our Experts

James Weisberger, MD, FACP, FASCP

Chief Medical Officer, Executive Vice President, Laboratory Director

Dr. Weisberger is a board certified anatomic and clinical pathologist and recognized leader in hematopathology. He oversees all key laboratory operations and quality systems, and maintains BioReference Laboratories as an innovative, quality laboratory where patient care and laboratory safety come first. Dr. Weisberger strives to position BioReference as a leader in providing patient-centric, precision-based laboratory results and data analytics for best practice of patient care.

Dr. James Weisberger has authored more than 40 publications as abstracts or peer-reviewed journal articles, and is an active educator at the New York Medical College, where he serves as a Clinical Associate Professor of Pathology and Medicine. He is a Fellow and Member of the New Jersey House of Delegates for the College of American Pathology, and a Fellow of the American Society of Clinical Pathology. He is also a member of the New Jersey Society of Pathology and Association for Molecular Pathology. Dr. Weisberger was Chief Resident in Pathology at Westchester Medical Center and holds both a BS and MS from Stanford University, and an MD from the University of Pennsylvania.

Bevan Tandon, MD

Director of Cancer Genomics

Dr. Tandon holds American Board of Pathology subspecialty board certifications in both molecular genetic pathology, and also hematopathology. His general certifications are in anatomic and clinical pathology. Dr. Tandon’s training in hematopatholgy consisted of an intensive fellowship and clinical instructorship at the University of Pittsburgh School of Medicine, under the guidance of WHO lead author Dr. Steven Swerdlow. His training in molecular genetic pathology was conducted at Washington University in St. Louis School of Medicine. Dr. Tandon completed his general residency training at Northwestern University Feinberg School of Medicine. Dr. Tandon is an active member of the Society for Hematopathology and the Association for Molecular Pathology.

Eric Antoniou, PhD

Assistant Director, Cancer Genomics

Dr. Antoniou earned his PhD from the University of Bordeaux, France. He was formerly the senior manager of Cold Spring Harbor Laboratory genome sequencing center. He also held management positions at Ginkgo Bioworks and The Jackson Laboratory. Prior to these positions, he was an Assistant Professor at the University of Missouri-Columbia. Dr. Antoniou has eighteen years of experience in genomics science, including nine years in next-generation sequencing.

Wojciech A. Swat, PHD, DABMGG, FACMG

Clinical Molecular Geneticist

Dr. Swat is a board certified clinical molecular geneticist holding certifications of American Board of Medical Genetics and Genomics (ABMGG) and European Board of Medical Genetics (EMBG). He joined GenPath in 2020 after a two decade-long tenure as Associate Professor of Pathology and Immunology, Washington University School of Medicine in St. Louis, MO. Prior to joining GenPath, he served as an Associate Medical Director of the Molecular Diagnostic Laboratory (MDL) of Barnes-Jewish Hospital where he was responsible for clinical case load, consultation to clinicians, CAP proficiency and validation testing, and training and education of medical students, pathology residents in AP/CP programs, and molecular and cytogenetics fellows during lab rotations.  His graduate training was conducted at the Basel Institute for Immunology with Harald von Boehmer, and his postdoctoral training at Harvard Medical School with Frederick W Alt. During his academic career, he has been distinguished as a Scholar of the Leukemia and Lymphoma Society and received several awards including Howard Hughes Medical Institute, American Cancer Society, Arthritis Foundation, and Irene Duggan/Irvington Institute scholarships. He contributed more than 100 research publications becoming one of the most highly-cited leaders in the field of immunology and cancer biology with over 11,000 literature citations (Google Scholar h-index 52, i10-index 75).

Zhixiong Xu, PhD, FACMG

Director, Cancer Cytogenetics

Zhixiong Xu is ABMGG-certified in clinical molecular genetics and clinical cytogenetics. He joined GeneDx in 2013 and served as Assistant Director of the Hereditary Cancer program. He received his BS in Biological Chemistry from Xiamen University and his PhD in Cell Biology from the Peking Union Medical College. He completed a postdoctoral fellowship in molecular oncology and was appointed Research Assistant Professor at the Vanderbilt-Ingram Cancer Center. While at the National Institutes of Health (NIH), he worked with Gary Felsenfeld in genetic and epigenetic regulation of gene expression and completed his medical genetics fellowship training at the National Human Genome Research Institute (NHGRI). Dr. Xu was a recipient of the Hope Street Kids Fellowship Award and the American Society of Hematology Scholar Award.