Our Team

Charles Caso joined Chembio Diagnostic Systems, Inc. in June 2020, and serves as General Manager and Chief Commercial Officer.  Charles has over 25 years of experience in sales and marketing leadership and a proven track record within diagnostics, life science and reference laboratory markets. Prior to joining Chembio, Charles was Vice President of Global Sales and Customer Success at ArcherDx. Prior to that, Charles served as Senior Vice President of Commercial Operations, Global Diagnostics at Meridian Bioscience. He also served in leadership roles with Beckman Coulter Genomics (Danaher Inc) and Quest Diagnostics. Charles received a B.S. from Indiana University of Pennsylvania and a M.B.A. from University of Pittsburgh.

Javan Esfandiari joined Chembio Diagnostic Systems, Inc. in February 2000, and serves as Chief Science and Technology Officer. Prior to joining the company, Mr. Esfandiari co-founded Sinovus Biotech AB, a Swedish biotech company where he served as Director of R&D until Chembio acquired Sinovus. He previously served as Director of R&D for On-Site Biotech. Mr. Esfandiari is the inventor of Chembio’s patented Dual Path Platform (DPP®) technology and developed more than 30 rapid point-of-care diagnostic products in the human and veterinary fields. Mr. Esfandiari received a B.S. in Clinical Chemistry and studied to M. Sc. Level in Molecular Biology from Lund University, Sweden.

Tom Ippolito joined Chembio Diagnostic Systems, Inc. in June 2005, and serves as Vice President, Quality and Regulatory Affairs. Prior to joining the company, Mr. Ippolito served as Vice President, Regulatory and Quality at Biospecifics Technologies. He previously held a number of positions with United Biomedical, Biospecifics, Merck, Rhone Merieux, Organon Teknika, Analytab Products Inc., and Olympus. Mr. Ippolito holds the position of Course Director of the Fundamentals of Bioscience Program at the State University of Stony Brook and is the instructor for clinical development and regulatory affairs.

Atif Rizvi Joined Chembio Diagnostic Systems, Inc. in June 2019, and serves as Vice President of Finance. Prior to joining the company, he worked at L3-Harris Technologies, an aerospace and defense manufacturer/contractor, where he served as Assistant Segment Controller for its Communication & Networked Systems segment. Atif worked at L3 for nearly twelve years and progressed through a range of positions in accounting & finance areas, including Manager-Corporate Controller’s Group, Financial Planning & Analysis (FP&A) Manager-Aircraft Sector, and Senior Auditor-Internal Audit. Throughout these roles, he addressed a diverse range of GAAP, internal control (including Sarbanes Oxley testing), and reporting issues. He has also developed revenue forecasts, annual operating budgets, and managed costs in partnership with engineering and R&D teams on long-term contracts. Atif is a licensed CPA in New York State and received his B.S-Accounting degree from the City University of New York.

Stella Rivera joined Chembio Diagnostics, Inc. in April 2018, and serves as Vice President of Human Resources.  Stella has over 25 years of experience in Human Resources and a proven track record within the pharma (brand & generics) and biotechnology industries. Prior to joining Chembio, Stella was Director of Human Resources at Pall Life Sciences (division of Danaher Inc).  Her prior experiences also include Wyeth Pharmaceuticals Inc. (Pfizer) and Watson Pharmaceuticals Inc. Stella has a BA from the InterAmerican University of Puerto Rico and a MBA from Turabo University – Puerto Rico.