Management Team


h stewart nielsen

H. Stewart Nielsen, Jr., Ph.D.

Vice Chairman and Founder

Prior to joining Nielsen, Dr. Nielsen founded AllerMed Laboratories, Inc. and served as President of the company for over 40 years. His interest in the antigenic properties of plants and microorganisms provided the foundation for developing and licensing numerous products in the field of allergy and immunology. His current interests at Nielsen BioSciences, Inc. include the diagnostic and therapeutic use of antigenic materials of Candida albicans and Coccidioides immitis. Dr. Nielsen received his B.S. in Biology and M.S. in Botany from Brigham Young University. Dr. Nielsen received his Ph.D. in Botany and Microbiology from The Ohio State University. He was awarded a National Science Postdoctoral Fellowship in Medical Mycology, which he completed at Duke University. He was a member of the Department of Microbiology and Immunology at Duke University Medical Center where he taught microbiology, mycology, and parasitology.

david burney

David P. Burney, Ph.D, MBA

President and COO

Dr. Burney has had over 20 years executive experience in the pharmaceutical industry with specific experience in manufacturing, quality and regulatory functions with extensive cGMP, FDA and compliance experience in biologics and sterile products. Most recently, he served as Vice President of Quality Operations at Biotest Pharmaceutical Corp. in Boca Raton, Florida, where he managed all aspects of quality for a manufacturer of plasma derived biological sterile drugs. Prior to Biotest, Dr. Burney was Vice President and Chief Operating Officer at Greer Laboratories, Inc. where he managed the Quality, Manufacturing and Regulatory Affairs Departments for the manufacture of allergenic extracts. Dr. Burney holds a Ph.D. in Chemistry from the University of Memphis and an MBA from Ashland University.

scott nielsen

Scott Nielsen, MBA

Vice President Operations

Mr. Nielsen has over 25 years of experience as a financial professional, with over 20 years within the biotech industry. He has executive responsibility for the general business operations of Nielsen BioSciences, Inc. including commercial operations and serves as the Designated Representative for the company with the California Board of Pharmacy. Mr. Nielsen began his career in public accounting with Deloitte in San Diego, where he was a Senior Consultant. Prior to joining NBS, Mr. Nielsen served as Vice President of AllerMed Laboratories, Inc., a biological pharmaceutical manufacturer. Mr. Nielsen is a Certified Public Accountant. He received his B.S. in Accounting from Brigham Young University and his MBA from Georgetown University.

lisa fey

Lisa Fey, MS

Director of Quality and Regulatory

Ms. Fey has over 30 years of experience in academia, pharmaceuticals, and contract research organizations with expertise in data integrity, in vivo assays, regulated animal facility management and regulated laboratory operations.  Ms. Fey has a BS in Biology from San Diego State University and a MS in Toxicology from the SDSU School of Public Health.  She holds RQAP-GLP certification from the Society of Quality Assurance (SQA) and the LATg certification from the American Association of Laboratory Animal Sciences (AALAS).  More recently as part of Nielsen Biosciences, she has expanded her knowledge of cGCP and cGMP processes through clinical trial management and stability testing of commercial products.

masoud ansari

Masoud Ansari

Director Pharmaceutical Development

Mr. Ansari has over 30 years of experience in the medical device and pharmaceutical industries with specific experience in microbiology, validation, manufacturing, and quality functions with extensive cGMP, FDA and compliance experience in biologics and sterile products. Most recently, he served as Site Quality Lead at Allermed facility of Stallergenes in San Diego, California, where he managed the quality system for a manufacturer of allergenic extracts. Prior to Allermed, Mr. Ansari was managing the microbiology laboratory at Medtronic (San Diego) where he managed the microbiology, sterilization and biocompatibility studies for the manufacture of cardiovascular devices. Mr. Ansari holds a B.S. in medical microbiology with minor in chemistry from the University of California Long Beach.