We are transforming genetic testing

Genetic disorders are caused by a wide variety of DNA changes that, until now, have required different technologies to detect. Traditional methodologies biochemically extract a slice of the DNA and then sequence it. This approach has produced a vast number of different tests that are designed to detect specific DNA changes within certain limitations.  Identifying the right test for the patient is often challenging. Further complicated by limited sensitivity and specificity, this leads to missed or delayed diagnoses and increased residual risk.

Our whole genome sequence (WGS) based methodology is shifting the genetic testing paradigm, overcoming the limitations of traditional technologies. We sequence the entire DNA and then slice the data in any number of relevant ways for analysis. With its ability to detect all major types of genetic variation, our Genomic Unity® testing methodology provides a better test at a lower overall cost to patients and payors.

Our interdisciplinary team of talented medical professionals, bioinformaticians, software engineers, information technology and operations professionals are leading the way to better genetic testing, one patient at a time.


Chief Director Clinical Genomics

VP Customer Support and Lab Services

Chief Human Resources Officer


Board Member

Board Member


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Haim Neerman

Haim’s career spans over 20 years of technology entrepreneurship. Prior to co-founding Variantyx, Haim co-founded Credorax Inc. – a global credit card acquiring bank, Fabrix systems (acquired by Ericson), Bandwiz Inc. and Actil Ltd.

Haim is a physics, math and computer science graduate of the Talpiot program / Hebrew University of Jerusalem.

Edward J. Sitar

Edward became our Chief Financial Officer in January 2022. Most recently he served as the Chief Financial Officer of 9Meters Biopharma (Nasdaq:NMTR), a clinical stage company developing therapeutic approaches that treat people with rare and debilitating conditions by leveraging the biology of the gut.   Mr. Sitar is an experienced financial executive with extensive healthcare background.  He has lead both public and private companies raising substantial capital and improving operations.  

Edward holds a B.S. in accounting from the University of Scranton and is licensed as a Certified Public Accountant in New Jersey

Yaron Rachmany

Yaron Rachmany oversees Variantyx’ IT systems and business processes. Prior to joining Variantyx, Yaron served as Director of Systems Operations and as a Director of IT Applications at Semtech Corporation (NASDAQ: SMTC). Prior to Semtech Yaron held the VP of Information Systems position with Credorax. Prior to Credorax, Yaron held senior Information Systems positions with Microsemi (NASDAQ: MSCC), Intel (NASDAQ: INTC) and ECI Telecom.

Yaron holds an M.Sc. and a B.Sc. in Industrial Engineering and Management (specialized in Information Systems) from Ben Gurion University in Israel.

Christine Stanley PhD, FACMG
Chief Director Clinical Genomics

As Variantyx’s Chief Director of Clinical Genomics, Christine is responsible for overseeing clinical genomic interpretations and regulatory compliance for the clinical laboratory. Prior to joining Variantyx, Christine held positions as Head of Clinical Laboratory at WuXi NextCODE, Chief Director of Clinical Genomics at Courtagen Life Sciences and Genetics Director at Athena Diagnostics.

Christine holds a Bachelor’s degree in Genetics from Texas A&M University and a PhD in Human Genetics from the Medical College of Virginia with fellowship training at Boston University in clinical molecular genetics. She is a diplomate of the American Board of Medical Genetics and Genomics and a Fellow of the American College of Medical Genetics and Genomics.

Christopher Zerwas
VP Sales

Chris serves as the VP of Sales. Chris’ primary focus is to drive revenue growth by leading a sales team to educate clinicians, and their supporting staff, about Variantyx’s genomic testing capabilities and services.  Chris brings 20 years of clinical genetic testing experience to Variantyx. Prior to Variantyx, Chris held senior sales management positions with Perkin Elmer Genomics, GeneDx and Athena Diagnostics.

Chris holds a Bachelor’s degree in Marketing from Pacific University.

Stephanie Zichi, MBA
VP of Marketing

As VP of Marketing, Stephanie is responsible for providing marketing strategy and thought leadership for Variantyx business lines. With over 10 years’ experience in the biotechnology and pharmaceutical industries, Stephanie has a unique blend of genetics expertise and business acumen. Her experience includes overseeing laboratories’ brand development, advertising, digital strategy, and global communications.


Stephanie completed her MBA from Dowling College and has Bachelors of Science in Business Administration and Marketing from Stony Brook University.

Tomer Jackman
VP Customer Support and Lab Services

As VP Customer Support and Lab Services, Tomer is responsible for delivering services to customers. Prior to co-founding Variantyx, Tomer was responsible for hardware development operations in the Pivotal/Greenplum division of EMC2 where he helped develop server clusters for “Massive Parallel Processing” databases. This followed a decade with EMC2 in several hardware engineering roles and work in R&D with HP/Indigo.

Tomer holds a high-tech MBA from Northeastern University in Boston, and a BSc in Electrical Engineering from Tel-Aviv University.

Tom DeLuca
Chief Human Resources Officer

Tom serves as our Chief Human Resources Officer.  Tom’s primary focus is to build a team in leading our People efforts by leading best-practices surrounding organizational planning, DE&I, HR operations, culture & engagement and talent as we continue to grow as an organization.  Tom brings a diverse industry and functional background to our team having led HR for several businesses inside and outside of healthcare.  Within healthcare, Tom led HR for Quest Diagnostic’s national sales and health plans organizations and recently worked as VPHR for Zelis Healthcare, a PE-backed healthcare technology organization, where Tom led HR for their Claims Cost Solutions business and corporate functions.  Tom previously held senior HR positions with AIG, Cendant and Selective Insurance.  Tom is a certified Myers-Briggs consultant and works in coaching leaders on team effectiveness.  Tom graduated from Kutztown University with a Bachelor’s degree in Business Administration.

Tom resides in New Jersey with his wife Soraya and three Children.   He enjoys time with his family, traveling and soccer.

Guy Ezekiel, MD

Guy joined the Pitango HealthTech team in May 2018 after serving as a Venture Partner at the fund for two years. In addition to Variantyx, he currently serves on the Board of Directors of Alike and Keepmed. Guy formerly served as the President and CEO of Ventor Technologies, a Pitango portfolio company and developer of revolutionary trans-catheter valves for the Cardiology market. In 2009 Ventor was acquired by Medtronic (NYSE: MDT). Following the acquisition, Guy was appointed General-Manager/Vice President at Medtronic. During his career, Guy served as the President & CEO of Brainsway (TLV: BRIN), President & CEO of Marval Pharma, and Senior Executive at the Pittsburgh headquarters of Medrad, Inc., a wholly owned subsidiary of Bayer Healthcare (FWB: BAYN).

Guy holds an MD from Ben-Gurion University of the Negev and an MBA (cum laude) from the University of Pittsburgh.

Hillel Bachrach
Board Member

Hillel is the Managing Partner of 20/20 HealthCare Partners, LLC, (20/20 HCP), a global investment entity he founded in 2005. 20/20 HCP has invested in many successful companies including Viztek (acquired by Konica Minolta in 2015), Corindus Vascular Robotics (purchased by Siemens HealthCare in 2019), XR Health, SQZ Biotechnology, Verseau Therapeutics and EnClear Therapies. In addition to Varianytx, Hillel currently serves on the Board of Directors for Zixi and Velocamp. Hillel previously served as president of Odin Medical Technologies, Inc., and helped found UltraSPECT, Ltd., the leader in providing sophisticated dose and procedure time reduction software solutions for nuclear medicine procedures which was sold to Pharmalogic in 2019.

Hillel received a BS in electrical engineering from Technion Israeli Institute of Technology and an MBA from the Kellogg Graduate School of Management.

Zafrira Avnur, Ph.D.
Board Member

Chief Scientific officer and partner at Quark Venture Inc.

Prior to Quark, Dr. Avnur was the Global Head of Academic Innovation, Roche Partnering 2009 – 2016. She was responsible for creating relationships with the world’s leading academic institutions and world class innovators, gaining Roche early access to innovation.  She has created eleven startup companies.

Dr. Avnur was named Global Head of Neglected Diseases Roche Partnering 2010-2012.

Preceding her academic innovation leadership role, Dr. Avnur assumed responsibility for scientific evaluations of partnering opportunities and started the “Finder” group for Biomarkers for all therapeutic areas at Roche. She acted as Liaison between Pharma and Diagnostic Divisions and contributed to the PHC (Personalized Health Care) initiative.

Prior to her partnering roles, Dr. Avnur worked in pharmaceuticals and diagnostics research and development for nearly 20 years. She held number positions progressing from scientist and manager to global responsibilities. In this role, she was overseeing the advancement of compounds from the bench into the clinic, and was involved in the design and execution of early clinical studies that characterize the pharmacodynamics and clinical effects of a number of compounds.

 In her management roles, Dr. Avnur ran groups of up to 44 scientists.

Dr. Avnur was named Distinguished Scientist, the highest scientific appointment at Roche.

Major scientific achievements include advancing three compounds (a PTHrP analog and two vitamin D analogs, for the treatment of postmenopausal osteoporosis) from early exploratory discovery research to the clinic.


Greg Faust, PhD
Board Member

Greg has managed many software product development projects, usually from the ground up. He held executive positions at Microsoft and two successful software start-up companies, one of which went public, and another acquired. In 2015, he completed an interdisciplinary PhD in genomics. His research focused on the development of novel genomic analysis algorithms, especially for the identification of structural variants in WGS data. He then joined Variantyx as CTO, and was instrumental in architecting the analysis pipeline used in the Genomic Unity® products. Having served on three previous boards, Greg continues as a member of the Board of Directors and angel investor in Variantyx. He also maintains his public domain open-source bioinformatics tools used in labs around the world.

Greg holds a BS in Computer Science from the University of Michigan, a MS in Computer Science from the Massachusetts Institute of Technology, and a PhD in Biochemistry and Molecular Genetics from the Medical School of the University of Virginia.

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