Lawrence A. Siebert
President and Director

Mr. Siebert has been Chairman of Chembio Diagnostic Systems, Inc. since 1992 and its President since mid-2002. Mr. Siebert’s background is in private equity and venture capital investing. From 1982 to 1991, he was associated with Stanwich Partners, Inc, which during that period financed and invested in middle market manufacturing and distribution companies. From 1992 to 1999, he was an investment consultant and business broker with Siebert Capital Corp. and Siebert Associates LLC, and was a principal investor in a privately held test and measurement company which was sold in 2002. Mr. Siebert received a JD from Case Western Reserve University School of Law in 1981 and a BA with Distinction in Economics from the University of Connecticut in 1978.

Cathy Dudnanski
VP, Marketing

Ms. Dudnanski joined Chembio in 2005 as Marketing Director for the human diagnostics products including assays for HIV 1/ 2 and Chagas disease. She was promoted to Vice President in 2007. Ms. Dudnanski brings over 20 years of domestic and international marketing & sales experience in medical devices and diagnostics to the company. Prior to joining Chembio, Ms. Dudnanski was a marketing manager for GE Healthcare and has served in senior marketing and sales positions for several diagnostics firms. She received a B.S in Medical Technology from Roanoke College and an MBA from Loyola. Ms. Dudnanski is a registered medical technologist and a member of the American Society of Microbiology.

Javan Esfandiari
Senior VP, Research & Development

In 1993 Mr. Esfandiari co-founded, and became a co-owner of  Sinovus Biotech AB where he served as Director of Research and Development for lateral flow technology until Chembio Diagnostic Systems, Inc. acquired Sinovus Biotech AB in 2000.  From 1993 to 1997, Mr. Esfandiari was Director of Research and Development with On-Site Biotech/National Veterinary Institute, Uppsala, Sweden, which was collaborating with Sinovus Biotech AB on development of veterinary products using lateral flow technology.  Mr. Esfandiari received his B.Sc. in Clinical Chemistry and his M. Sc. in Molecular Biology from Lund University, Sweden. 

Richard Bruce
VP, Operations

Mr. Bruce has been VP of Operations since April 2000. In this capacity, he directs Chembio’s production, maintenance, inventory, shipping and receiving, and warehouse operations.  From 1998 to 2000, Mr. Bruce was a senior manager at V.I. Technologies.  From 1993 to 1998, he held various management positions at Biomerieux.  Mr. Bruce held director level positions at American Home Products from 1984 to 1993.  Mr. Bruce has over 25 years of operations management experience with Fortune 500 in vitro diagnostic and blood fractionation companies.  Mr. Bruce received his BS in Management from National Louis University in 1997.

Tom Ippolito
VP, Regulatory Affairs, QA & QC

Mr. Ippolito joined Chembio in June 2005. He has over 20 years experience with in vitro diagnostics for infectious diseases, protein therapeutics, vaccine development, Process Development, Regulatory Affairs and Quality Management. Over the years, Mr. Ippolito has held Vice President level positions at Biospecific Technologies, Corp., Director level positions in Quality Assurance, Quality Control, Process Development and Regulatory Affairs at United Biomedical, Inc. Mr. Ippolito is also the Course Director "drug development process" and "FDA regulations", a BioScience Certificate program at New York State University of Stony Brook.