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Expert is a pharmaceutical development scientist, consultant, and expert witness with more than 40 years of experience in the pharmaceutical industry. He spent the first two decades of his career within the Johnson & Johnson family of companies, holding progressively senior roles at McNeil Pharmaceutical and the R.W. Johnson Pharmaceutical Research Institute — including Research Manager and Group Leader of Physical Pharmacy — where he led preformulation and physical-pharmacy support for formulation, clinical, and pre-clinical development. His work there spanned characterizing new chemical entities, resolving problematic drug substance and dosage form properties, and developing analytical methods such as particle size analysis and X-ray powder diffraction for polymorph identification, in addition to authoring CMC sections for numerous IND and NDA submissions.

In the late 1990s, Expert moved into pilot plant leadership, serving as founding Pilot Plant Operations Manager and later Assistant Director at a novel drug delivery and tissue engineering company, where he built and managed a cGMP/cGLP-compliant facility supporting pre-clinical, clinical, and regulatory stability production. Since 2002, he has led his own independent consulting practices, providing pharmaceutical development advisory services to multinational, mid-size, and virtual pharma companies, as well as academic institutions and the NIH, on preformulation, CMC development, and process validation matters.

Since 2003, Expert has built an extensive expert witness practice, serving in more than a dozen Paragraph IV Hatch-Waxman and Canadian Notice of Allegation patent litigation matters involving well-known branded pharmaceutical products. His engagements have covered claims construction, patent prosecution history, formulation and preformulation issues, polymorphism, and particle size, on behalf of both innovator and generic pharmaceutical companies. He has authored numerous expert reports and declarations and has testified at both deposition and trial.

Alongside his industry and litigation work, Expert has maintained an active academic and scholarly presence, holding adjunct and visiting faculty appointments at several universities and delivering dozens of invited seminars, symposia, and training courses over his career. He is the author of 17 peer-reviewed journal manuscripts, 12 meeting abstracts, and 5 technical magazine articles, and has been recognized for his contributions as a peer reviewer for national scientific journals and NIH grant panels. He holds a Ph.D. in Pharmaceutics from the Philadelphia College of Pharmacy and Science and is a long-standing member of the American Association of Pharmaceutical Scientists, where he has held multiple leadership roles within its Pharmaceutical Technologies Section.