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Meet Our Immunology Leadership Team



Air-liquid interface culture of colonic epithelial cells; Clara Moon, Janssen R&D

Leaders in Immunology




David M. Lee, M.D., Ph.D., is Global Immunology Therapeutic Area Head for the Janssen Pharmaceutical Companies of Johnson & Johnson where he leads a team focused on end-to-end pipeline and a portfolio of treatments for immune-mediated disease. Under his leadership, Immunology researchers are working to build on the success of our current portfolio, which includes STELARA® (ustekinumab) and TREMFYA® (guselkumab).

Prior to joining Johnson & Johnson in September 2018, David was based in Basel, Switzerland, where he served as Global Head, Immunology, Inflammation and Infectious Disease Discovery and Translation Area for Roche, and prior to that, as Global Head of Autoimmunity, Dermatology, and Transplant Translational Medicine at the Novartis Institutes for BioMedical Research. In each of these roles, he led on the strategic approaches that fed the companies’ pipelines, prioritized assets, and accelerated their development. His ability to develop external collaborations and lead and develop his teams, was central to his success in each organization.

Before transitioning to the pharmaceutical industry, David was a faculty member at Brigham and Women’s Hospital/Harvard Medical School. While there, his research laboratory focused on disease mechanisms in rheumatology and he was also a practicing rheumatologist. As a precursor to his career in industry, while at Harvard, he also participated in co-founding multiple start-ups. Ultimately, one – a biotech – was acquired by a major pharmaceutical company.

He is an active author and speaker, and has completed more than 80 peer-reviewed publications, book chapters, and more than 100 lectures/seminars.

David earned his undergraduate degree at Stanford University, where he discovered his fascination with the intricacies of the immune system. He subsequently earned his M.D. and Ph.D. in Microbiology/Immunology from the Duke University School of Medicine. His passion for developing new medicines is rooted in his experiences treating patients as a practicing rheumatologist.

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David M. Lee, M.D., Ph.D.

Global Therapeutic Area Head



Teri Lawver is Worldwide Vice President for the Immunology Therapeutic Area with Janssen Pharmaceutical Companies of Johnson & Johnson. Together with the Immunology Research & Development Therapeutic Area leader, she has end-to-end responsibility for the Janssen Immunology portfolio and pipeline.

Teri has more than 25 years of global healthcare and business leadership experience spanning three continents, three healthcare sectors, and dozens of disease areas. Since joining Johnson & Johnson in 2002 at Centocor, Teri has held several leadership and executive positions across the Johnson & Johnson Family of Companies. She is a values-driven leader who has delivered above-market performance in each of the five Johnson & Johnson business units she has led. Prior to joining Johnson & Johnson, Teri was an Associate Principal at McKinsey & Company and a leader in the firm’s global healthcare practice. She began her career as a Derivatives Analyst at Bloomberg Financial Markets, LLP. 

A multi-faceted leader, Teri is adept at delivering both transformational strategies and operational excellence. She is a vocal champion of diversity and inclusion and has a proven track record of building new businesses, creating sustainable innovation-based growth, identifying exceptional talent, and developing high-performance teams.

Teri holds a Bachelor of Science degree, summa cum laude, from Georgetown University in Washington D.C., and an MBA from Duke University in Durham, North Carolina. 

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Teri L. Lawver

Worldwide Vice President



Richard Appiah is Vice President, Disease Area Commercial Leader, Gastroenterology and IL-23 Pathway for the Immunology Therapeutic Area at Janssen Global Services. In this role, he is responsible for leading the commercial strategy to support the discovery, development, and launch of new therapeutics within the inflammatory bowel disease and IL-23 pathway areas.

Prior to this role, Richard served as Senior Director, Franchise Strategy Marketing for the U.S. Cardiovascular & Metabolism organization at Janssen, significantly contributing to growth of the XARELTO® (rivaroxaban) brand. Under his leadership, XARELTO established a first-of-its-kind, direct-to-patient commercial model designed to improve adherence and lower patients’ out-of-pocket cost. Richard joined Johnson & Johnson in 2002 and has held roles of increasing responsibility at Janssen in Oncology, Neuroscience, and Immunology.

Beyond his work at Johnson & Johnson, Richard spent four years at Pfizer in the specialty business unit where he was responsible for payer marketing and contracting strategies for a portfolio of biologic products. 

Richard holds Bachelor and M.S. degrees from Syracuse University and an MBA from Harvard Business School. 

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Richard Appiah

Vice President
Disease Area Commercial Leader
Gastroenterology and IL-23 Pathway



Pamela Bradt, M.D., is Vice President, Head of Data Science for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, Pam is responsible for driving Data Science strategy, priorities, and adoption, to build industry-leading expertise and inform key aspects of drug discovery and development, including clinical trial design, pipeline decision-making, target identification, and target validation.

Pam brings multi-faceted expertise in clinical drug development, epidemiology, and health economics, having held leadership roles in both large and midsize global pharmaceutical companies. Before joining Janssen in 2021, Pam served as Chief Scientific Officer at the Institute for Clinical and Economic Review (ICER), where she led the organization’s research enterprise, including systematic evidence reviews and health economic modeling.

Prior to her role at ICER, Pam served as Chief Medical Officer for Aegerion Pharmaceuticals, a biopharmaceutical company focused on rare diseases, leading Global Clinical Development, Medical Affairs and Global Health Economics and Outcomes Research (HECOR) for several therapeutic areas.

A pediatrician by training, Pam earned her medical degree from the University of Kansas School of Medicine, and her master’s degree from the University of Texas School of Public Health. Prior to joining industry, Pam worked in academic medicine, where she was nominated as Physician of the Year in Houston, Texas.

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Pamela Bradt, M.D.

Vice President
Immunology Data Science



Dan Cua, Ph.D. is Vice President, IL-23 Pathway Area Leader for the Immunology Therapeutic Area at Janssen Research and Development, LLC. In this role, Dan oversees the design and implementation of the scientific strategy for Discovery, Early, and Late Clinical Development of Janssen’s IL-23 pathway program.

Prior to Janssen, Dan served as a Senior Principal Scientist at Merck Research Laboratories in Palo Alto, California leading the Immunology and Immuno-Oncology Discovery groups, as well as novel research programs. Prior to Merck, Dan held roles of increasing responsibility with Schering-Plough Biopharma.

Dan is a recognized leader in the field of IL-23 biology. He has published more than 100 peer-reviewed articles, including the first publication on IL-23 regulation of immunity. His articles have been cited more than 41,000 times, making him one of the most cited authors in the immunology field. In addition, he holds 15 patents.

Dan received his Ph.D. in Molecular Microbiology and Immunology from the University of Southern California (USC) School of Medicine. He also completed two postdoctoral fellowships at the USC Department of Neurobiology within the School of Medicine and DNAX Research Institute.

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Dan Cua, Ph.D.

Vice President
IL-23 Pathway Area Leader



Paul Duncan is Senior Director, External Innovation for the Immunology Global Commercial Strategy Organization of Janssen Global Services. In this role, Paul is responsible for leading the overall external innovation strategy and operations for Janssen Immunology, partnering closely with the Immunology Research & Development and New Business Development teams.

During his tenure with Johnson & Johnson, Paul has made significant contributions across a number of therapeutic areas and brings extensive commercial experience to his role. Prior to his current role, Paul served as the National Sales Director, Rheumatology, where under his leadership, the rheumatology franchise successfully launched SIMPONI ARIA® (golimumab) and STELARA® (ustekinumab), while navigating the challenges of managing a portfolio and accelerating the performance of growth assets in a complex access environment. Paul played a key role in the advancement of the Janssen customer engagement model, integrating real world evidence, quality, and outcomes-based data. In addition, he led the harmonization of the Janssen sales competency model and contributed to the evolution of the strategic talent approach across Janssen North America.

Prior to his leadership in Sales, Paul was a Group Product Director supporting the rheumatology franchise where he led the professional marketing effort. During his tenure, SIMPONI® (golimumab) experienced market leading growth in the anti-TNF category. Additionally, he was Regional Marketing Leader, Asia Pacific within the anti-infective and urology franchises, where he led the successful launch of DORIBAX® (doripenem) in eight countries and PRILIGY (dapoxetine) in two countries. Paul has held positions of increasing responsibility in marketing and has a long track record of success as a sales leader with previous experience as both a District Manager and Region Business Director for Janssen.

Paul earned a B.A. in Chemistry and a B.S. in Biochemistry from North Carolina State University and an MBA from Virginia Commonwealth University in Richmond, Virginia.

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Paul Duncan

Senior Director
External Innovation



Kevin Hamill is Vice President, Business Development for the Immunology Therapeutic Area (TA) at Johnson & Johnson Innovation, Janssen Business Development. In this role, he leads all business development activities in support of the Immunology TA, including transactions, acquisitions, scientific licensing and alliance management.

Kevin has a track record of over 23 years of success within the pharmaceutical industry, with launch experience in specialty care, primary care, and orphan products in complex and competitive markets. His commercialization experience includes early design, life cycle planning, and mature brand management as well as business development.

Since joining Janssen, Kevin has made significant contributions across Immunology serving as Vice President, Strategic Account Management for Janssen’s Strategic Customer Group and as Senior Director of Janssen’s Immunology Biosimilars and Portfolio Strategy. Kevin began his career at Janssen as National Sales Director for Gastroenterology, successfully launching STELARA® (ustekinumab) in Crohn’s disease, while continuing to grow REMICADE® (infliximab) in the face of significant biosimilar competition.

Prior to his roles at Janssen, Kevin held positions of increasing responsibility at AstraZeneca. Most recently, he was the Head of Marketing for the U.S. Diabetes Franchise, leading commercial strategy and marketing operations for nine products.

Kevin holds a Bachelor of Science degree in Chemistry from the University of Richmond.

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Kevin Hamill

Vice President
Janssen Business Development



Alyssa Johnsen, M.D., Ph.D., is Vice President, Rheumatology and Maternal-Fetal Disease Area Leader for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, Alyssa is responsible for driving scientific leadership in rheumatology and maternal-fetal health, overseeing innovative compounds across multiple phases of development.

Prior to her role at Janssen, Alyssa held clinical development, translational and portfolio leadership roles across Immunology and Oncology at Bristol-Myers Squibb, encompassing both early and late development.  She led development of a portfolio of immune-oncology assets from Phase 1 through proof-of-concept as well as early registrational trials.  Within Immunology, she held a variety of roles including leader of the translational team for a key marketed asset and the leader of the late-phase clinical development group.

Earlier in her career, Alyssa was a faculty member in the Division of Rheumatology at the Brigham and Women’s Hospital and subsequently the University of Pennsylvania, performing basic and translational research in autoimmune diseases as well as caring for rheumatology patients.

Alyssa received her bachelor’s degree in Chemistry at Duke University and her Ph.D. in Immunology and M.D. at Case Western Reserve University. She completed residency training in internal medicine at the Massachusetts General Hospital and a fellowship in rheumatology at the Brigham and Women’s Hospital.

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Alyssa Johnsen, M.D., Ph.D.

Vice President
Rheumatology and Maternal-Fetal Disease Area Leader



June Lanoue is Vice President, Disease Area Commercial Leader, Rheumatology and Immunodermatology for the Immunology Therapeutic Area at Janssen Global Services. In this role, she is responsible for developing and executing the commercial strategy to support the discovery, development, and launch of new therapeutics within the Rheumatology and Immunodermatology disease areas. This involves leading a team of global commercial strategy and analytics professionals to evolve deep insights to inform differentiated development plans and lifecycle management approaches.

June also provides leadership to global commercial teams to establish effective partnerships with cross-functional and regional stakeholders to ensure worldwide launch readiness for new products and line extensions, and to maximize current in-market assets worldwide.

Prior to this role, June served as the Director of Marketing for DARZALEX® (daratumumab) in the U.S. Oncology organization at Janssen. There, she was responsible for leading a team to deliver strong growth, leveraging rapidly approaching line extensions for DARZALEX® for newly diagnosed multiple myeloma and launching DARZALEX FASPRO™ (daratumumab and hyaluronidase-fihj). Prior to the role, June was the National Sales Director for the Cardiovascular & Metabolism Therapeutic Area, leading a team of ~400 field force.

Prior to joining Janssen in July of 2016, June spent 16 years with Novartis where she led teams to deliver strong results across multiple challenging and complex market spaces including immunology, rare inflammatory diseases, transplant, asthma, dermatology, cardiovascular, and diabetes. Overall, she has led more than 15 launches across therapeutic areas.

June graduated from the State University at Binghamton, NY with a Bachelor of Arts in Comparative Literature. 

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June Lanoue

Vice President
Disease Area Commercial Leader
Rheumatology and Immunodermatology



Pascale Marty-Ethgen, Pharm.D., Ph.D. is Vice President, Immunology Therapeutic Area Portfolio Management and External Innovation Leader for Janssen Research & Development, LLC. In this role, Pascale is responsible for implementation of the Immunology portfolio strategy, and for all aspects of portfolio management. She also leads the development and implementation of the external innovation strategy, ensuring that Janssen Immunology has access to cutting-edge, transformational external innovation, while promoting excellence in the evaluation of external assets and oversight of alliance management for the pre-clinical external portfolio.

Pascale joined Janssen in January 2015 as Vice President, Compound Development Team Leader for STELARA® (ustekinumab) where she had accountability for all research and development and lifecycle management activities for the drug. Most notably, Pascale led the team that delivered the global submission and approval in two new indications, as well as the progression of a third indication to a global Phase 3 program.

Pascale has more than 25 years of experience in the pharmaceutical industry in roles spanning portfolio strategy, commercial strategy, research and development and business development in biotechnology, consulting for multi-national companies in France, the United Kingdom, and the United States. She has a proven track record of leading global, matrixed teams developing new medicines through to product registration and launch. She also possesses extensive business development experience, including due diligence and management of strategic alliances and virtual drug discovery partnerships.

Prior to joining Janssen, Pascale spent 12 years at GlaxoSmithKline where she held several positions of increasing responsibility across a broad range of therapeutic areas.

Pascale received her Pharm.D. from the University of Bordeaux, France and her Ph.D. in Pharmacology from the University of Marseille, France.

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Pascale Marty-Ethgen, Pharm.D., Ph.D.

Vice President
Portfolio Management and External Innovation



Lloyd S. Miller, M.D., Ph.D., is Vice President, Immunodermatology Disease Area Leader for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, Lloyd drives the development and implementation of the scientific strategy for immunodermatology to help meet the needs of the millions of patients living with immune-mediated skin diseases.

Prior to Janssen, Lloyd served as Vice Chair for Research in Dermatology within the Department of Dermatology at Johns Hopkins. He was also a Professor of Dermatology, Infectious Diseases, Orthopedic Surgery and Materials Science and Engineering at the Johns Hopkins University School of Medicine.

A known leader in dermatology, Lloyd has published more than 100 peer-reviewed manuscripts, review articles, book chapters and editorials and has given more than 75 oral presentations at national and international scientific programs and meetings. Lloyd has received several grants from the National Institutes of Health (NIH), in addition to private foundation and industry funding for his research.

Lloyd received his M.D. and Ph.D. from the State University of New York Downstate Medical Center in Brooklyn, New York. He completed his dermatology residency and post-doctoral research fellowship in the Specialty Training and Advanced Research program at the University of California, Los Angeles.

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Lloyd S. Miller, M.D., Ph.D.

Vice President
Immunodermatology Disease Area Leader



Neely Mozaffarian, M.D., Ph.D., is Vice President, Autoantibody Pathway Area Leader for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, Neely is responsible for the design and implementation of the scientific strategy for the Autoantibody Pathway portfolio, partnering with teams across the Janssen therapeutic area to identify external opportunities and platforms required for next-generation approaches to the autoantibody pathway targets.

Prior to her role at Janssen, Neely led a team in global clinical drug development for small and large molecules and was responsible for strategy and deliverables for autoimmunity and rheumatology programs as Senior Vice President at Ichnos Sciences, a subsidiary of Glenmark Sciences.

Prior to joining Ichnos, Neely served as Group Leader, Global Autoimmunity and Rheumatology Clinical Research and as Executive Director, Clinical Research, Inflammation and Respiratory Therapeutics at Gilead Sciences. Before joining Gilead, she held positions focusing on rheumatology and immunology at Lilly, AbbVie and Bristol Myers Squibb.

Neely earned her M.D. and Ph.D. degrees from Albert Einstein College of Medicine in New York. She trained in internal medicine and rheumatology at the University of Washington, Seattle and has authored numerous abstracts and scientific articles.

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Neely Mozaffarian, M.D., Ph.D.

Vice President
Autoantibody Pathway Area Leader



Dan Pettitt is Vice President, Market Access, Immunology for the Global Commercial Strategy Organization, Janssen Global Services. He is responsible for developing product access strategies and corresponding evidence generation programs to optimize utilization and revenue. For more than seven years, Dan and the Immunology Access team have successfully secured access and exceeded time to reimbursement metrics for STELARA® (ustekinumab), SIMPONI® (golimumab), and TREMFYA® (guselkumab) in multiple indications.

Prior to working at Janssen, Dan spent 15 years in market access and reimbursement at Bristol Meyers Squibb (BMS), Pfizer, and Amgen. While working at BMS, Dan led access and health economic activities for three top-selling drugs. After BMS, Dan led reimbursement activities for ten years at Pfizer and helped his organization to win multiple U.S. managed care best partner awards. Dan was also a key contributor to a real-world evidence generation program that was able to successfully differentiate the company’s lead anti-inflammatory treatment from its competitor to prevent license removal. 

Dan’s professional objectives and career aspirations have played a key role in developing viable business models and strategies that will endure as healthcare systems evolve globally. He has a strong background in commercial, clinical development, evidence-based medicine, epidemiology, and health economic disciplines. In addition, he has extensive relationships with academia and an impactful academic publication history.

Dan earned his MBA from Columbia University and a M.S. in Epidemiology and D.V.M. from the University of Guelph.

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Dan Pettitt

Vice President
Market Access



Michael Plotnick, M.D. is Vice President, Global Medical Affairs for the Immunology Global Commercial Strategy Organization of Janssen Global Services. In this role, he leads a team of Global Medical Affairs leaders responsible for the clinical-commercial optimization of product development and lifecycle management strategies and plans for both approved products, and products in clinical development for the industry-leading Janssen Immunology portfolio.

Michael joined Janssen in 2004 where he served as the Medical Director for the Dermatology Disease Area supporting the launch of REMICADE® (infliximab) for psoriatic arthritis and psoriasis in the U.S. Most recently, Michael served as the Global Medical Affairs Leader for STELARA® (ustekinumab) and TREMFYA® (guselkumab).

Prior to joining Janssen, Michael served on the medical faculty of the University of Pennsylvania School of Medicine for 11 years. He was an attending physician at the Hospital of the University of Pennsylvania and Philadelphia Veterans Administration Hospital and ran a National Institutes of Health-funded laboratory studying the structure-function, kinetics and molecular mechanisms of serine protease inhibitors and their interaction with serine proteases.

Michael earned his M.D. from the New York University School of Medicine in New York City. He completed his residency training in internal medicine at Columbia Presbyterian Medical Center in New York City, and clinical and research fellowship training in pulmonary and critical care medicine at the University of Pennsylvania in Philadelphia, Pennsylvania.

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Michael Plotnick, M.D.

Vice President
Global Medical Affairs



Jennifer E. Towne, Ph.D. is Vice President, Immunology Discovery at Janssen Research & Development, LLC where she applies her scientific expertise to generate an industry-leading Discovery and Early Development Immunology portfolio. Her oversight spans rheumatology, gastroenterology, and interleukin (IL)-23-related diseases, as well as the scientific pillars of innate and adaptive immunity and tissue mechanisms.

In her previous role at Janssen Research & Development, Jennifer was responsible for Discovery efforts in inflammatory bowel disease (IBD) on the West Coast and, shortly after, took over global responsibility for IBD Discovery.

Prior to joining Janssen, Jennifer served in various roles at Amgen where she led the development and implementation of Amgen’s IBD research strategy. She has extensive expertise in the IL-23, IL-17, and IL-1 family of proteins and has supervised both large and small molecule programs in both IBD and psoriasis.

Jennifer completed her doctoral degree in the Department of Molecular Genetics, Biochemistry, and Microbiology at the University of Cincinnati School of Medicine. She completed her post-doctoral fellowship at Immunex where she investigated the role of novel IL-1 family members in physiology and pathophysiology.

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Jennifer E. Towne, Ph.D.

Vice President
Immunology Discovery



George Vratsanos, M.D. is Vice President, Translational Science and Medicine (TSM) for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, he is responsible for leading the TSM team, integrating closely with both Discovery and Clinical Development, and fostering new ideas and methodologies that deliver on the Janssen portfolio strategy.

In his previous role, George served as Vice President, Head of the Rheumatology/Autoimmunity Disease Area, leading a cross-functional team of experts to prioritize scientific and business strategies with the goal of maintaining industry leadership in rheumatology and aligning with the therapeutic area’s pathways-based approach. Prior to this, George was Head of Early Development, Immunology, where he innovated clinical trial operations and piloted external partnerships with academic networks and clinical research organizations.

Prior to joining Janssen, George served as Executive Global Program Head of the Immunology and Dermatology franchises at Novartis where he supported multiple biologic global submissions. Before that, George led Roche’s clinical development in autoimmune diseases as the Translational Medicine Leader and served as the Group Director at Bristol-Myers Squibb.

A rheumatologist by training, George earned his M.D. from New York University and completed a post-doctoral fellowship in rheumatology/immunology at Yale University. In addition, he holds a B.S. and an M.S.in Biomedical Engineering from Columbia University.

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George Vratsanos, M.D.

Vice President
Translational Science and Medicine



Jan Wehkamp, M.D. is Vice President, Gastroenterology Disease Area Leader for the Immunology Therapeutic Area at Janssen Research & Development, LLC. In this role, he is responsible for driving scientific leadership in gastroenterology for many of Janssen’s active development programs including STELARA® (ustekinumab) and TREMFYA® (guselkumab), as well as many innovative compounds in early development.

Prior to his role at Janssen, Jan served as a Heisenberg Professor of Medicine, teaching innate immunology in inflammation and infection at the University of Tübingen in Baden-Württemberg, Germany. In addition, he was the Chief Scientific Officer for Defensin Therapeutics, a Danish biopharmaceutical company he cofounded in 2013, focused on developing and commercializing products for diseases associated with dysregulation of the human microbiota. Defensin Therapeutics’ research was based on more than two decades of expertise from Jan’s laboratory at the University of Tübingen.

Prior to this, Jan worked as a Principal Investigator of Research in Gastroenterology and Pharmacology at the Dr. Margarete-Fischer-Bosch-Institute of Clinical Pharmacology in Germany.

Jan has authored more than 120 publications and key presentations.

He received his M.D. from University of Lübeck in Germany and completed his post-doctoral work in immunology and microbiology at the Cleveland Clinic in Ohio and University of California in Davis, California.

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Jan Wehkamp, M.D.

Vice President
Disease Area Leader