10 Ionis regulatory affairs leaders
Tiffany L. Baumann, Vice President, Regulatory Affairs, is the most senior person on this page of Ionis regulatory affairs leaders, whose current titles also span global regulatory affairs, CMC regulatory affairs, regulatory operations and ad/promo compliance. A reader can learn how regulatory affairs leaders work at Ionis from people who have held the role.
Professionals to explore
Christie Hamel
LinkedInExperience: Executive Director, Regulatory Operations · Ionis Pharmaceuticals, Inc.
Christie Hamel has been Executive Director, Regulatory Operations at Ionis Pharmaceuticals, Inc. since March 2023, based in Carlsbad, California. At Ionis, Christie Hamel also held Director of Regulatory Operations from 2018 to 2023, and was Assistant Director of Regulatory Operations from 2013 to 2018 and Regulatory Operations Manager from 2010 to 2013.
Denzel Ngoma
LinkedInExperience: Director of Regulatory Affairs - Global Regulatory Lead · Ionis Pharmaceuticals, Inc.
Denzel Ngoma has been Director of Regulatory Affairs - Global Regulatory Lead at Ionis Pharmaceuticals, Inc. since June 2025, based in Marietta, Georgia. Denzel Ngoma was also Director, Regulatory Affairs at Atea Pharmaceuticals, Inc from 2023 to 2025 and Associate Director, Regulatory Strategy at Mitsubishi Tanabe Pharma Development America from 2021 to 2023.
Jennifer Franklin
LinkedInExperience: Director, CMC Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Jennifer Franklin has held Director, CMC Regulatory Affairs at Ionis Pharmaceuticals, Inc. since 2018 and Executive Director there since July 2021, based in Carlsbad, California. The profile headline reads Executive Director, CMC Regulatory Affairs at Ionis Pharmaceuticals, Inc., and the listing also shows Associate Director, Chemistry, Manufacturing, & Controls - Regulatory Affairs at Ionis since 2017.
John Paul Marcus, Pharm.D.
LinkedInExperience: Executive Director, Regulatory Affairs Ad/Promo Compliance · Ionis Pharmaceuticals, Inc.
John Paul Marcus has been Executive Director, Regulatory Affairs Ad/Promo Compliance at Ionis Pharmaceuticals, Inc. since October 2024, based in Arlington Heights, Illinois. John Paul Marcus was Sr. Director, Commercial Regulatory at Travere Therapeutics from 2022 to 2024 and Director, Regulatory Affairs - Labeling, Advertising and Promotion at Horizon from 2017 to 2022.
Nancy Johansen
LinkedInExperience: Executive Director Global Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Nancy Johansen has been Executive Director Global Regulatory Affairs at Ionis Pharmaceuticals, Inc. since July 2022, based in Dracut, Massachusetts. Nancy Johansen was Director Global Regulatory Affairs at Ionis from 2018 to 2022, Director, Regulatory Affairs at Orchard Therapeutics - U.S. in 2018 and Director, Regulatory Affairs at Miltenyi Biotec from 2003 to 2018.
Nathaniel Asamere, MS, RAC
LinkedInExperience: Director of Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Nathaniel Asamere has been Director of Regulatory Affairs at Ionis Pharmaceuticals, Inc. since October 2024, based in Montclair, New Jersey. At Pfizer, Nathaniel Asamere was Director, Global Regulatory Sciences - Oncology from 2019 to 2024 and Senior Manager, Regulatory Affairs Biosimilars from 2016 to 2020.
Sean Harrison PharmD RAC
LinkedInExperience: Director, Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Sean Harrison has been Director, Regulatory Affairs at Ionis Pharmaceuticals, Inc. since January 2023, based in Midlothian, Virginia. Sean Harrison was Associate Director, Regulatory Affairs at Ionis from 2021 to 2023 and Senior Manager, Regulatory Affairs at UCB from 2018 to 2021.
Stephanie Nelson
LinkedInExperience: Director, CMC Regulatory · Ionis Pharmaceuticals, Inc.
Stephanie Nelson has been Director, CMC Regulatory at Ionis Pharmaceuticals, Inc. since April 2024, based in Peapack - Gladstone, New Jersey, and was Director at Pfizer from 2019 to 2024. The profile describes Stephanie Nelson as a CMC Regulatory Affairs director who develops and executes CMC regulatory strategy for investigational and commercial products globally.
Tiffany L. Baumann
LinkedInExperience: Vice President, Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Tiffany L. Baumann has been Vice President, Regulatory Affairs at Ionis Pharmaceuticals, Inc. since July 2022, based in San Diego County, California. At Ionis, Tiffany L. Baumann was Executive Director, Regulatory Affairs from 2019 to 2022, Director, Regulatory Affairs from 2017 to 2019 and Associate Director, Regulatory Affairs in 2016.
Tracey A. Burr
LinkedInExperience: Executive Director, CMC Regulatory Affairs · Ionis Pharmaceuticals, Inc.
Tracey A. Burr has been Executive Director, CMC Regulatory Affairs at Ionis Pharmaceuticals, Inc. since July 2022, based in Greater Boston. Tracey A. Burr was Director, CMC Regulatory Affairs at Ionis from 2021 to 2022 and at Akcea Therapeutics from 2019 to 2021, and was Vice President, CMC & Pharmaceutical Development, Proprietary Products at Athenex from 2018 to 2019.
Choose the right perspective
Look first at the area each person's title names, such as global regulatory leadership, CMC, operations or advertising and promotion, and match it to your question. Then weigh whether an executive director's wider view or a director's closer view of one program suits you better.
Questions to take into the conversation
- 01What did you focus on first when you took on your regulatory affairs role at Ionis?
- 02How do you balance competing regulatory priorities in the work you lead?
- 03What has your own work at Ionis taught you about developing regulatory affairs professionals?
Reaching Ionis regulatory affairs leaders
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About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.