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Senior Director, Medical Writing

Annexonbioscience · San Francisco Bay Area · 2026-06-03

executive
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About this role

Company:

At Annexon Biosciences we are a biopharmaceutical company advancing a late-stage clinical platform of novel therapies for people living with devastating classical complement-mediated neuroinflammatory diseases of the body, brain, and eye. Our novel scientific approach targets upstream C1q to block the classical complement inflammatory cascade before it starts, and its therapeutic candidates are designed to provide meaningful benefits across multiple autoimmune, neurodegenerative and ophthalmic diseases. With proof-of concept data in Guillain-Barré syndrome, Huntington’s disease and geographic atrophy, we are rigorously advancing our mid-to late-stage clinical trials to bring new potential treatments to patients as quickly as possible. At Annexon, you’ll be part of a team committed to making an impact together.

For more information on Annexon and our pipeline, check out our site Annexon Biosciences & Annexon Pipeline. We trade on Nasdaq under the ticker symbol ANNX and are headquartered in Brisbane, CA.

We're seeking exceptional talent from all backgrounds to fuel our growth. At Annexon, we're building a diverse, equitable, and inclusive workplace. We value unique perspectives and unconventional paths. If you're the best candidate for the job, even if you don't perfectly fit the traditional mold, we encourage you to apply. Learn more about our commitment to diversity, equity, inclusion, and our company culture!

Position:

The Senior Director, Medical and Scientific Writing plays a critical role within the organization. Reporting to the SVP, Regulatory, Quality and Pharmacovigilance, you will work in partnership with a talented and collaborative team across our Clinical, Regulatory, Quality, Medical Affairs, Commercial and CMC departments to author and drive development of key documents in support of all of our programs. You will be empowered to interpret data, formulate messaging, and strategize on the development of Clinical and Regulatory documents. This role will be responsible for the building of critical writing infrastructure and processes at Annexon, including the development of best practices and resources for document management and timelines, template and shell creation, lexicon and document QC, publishing, and editing standards. You will also have an opportunity to support scientific communications, including the creation of manuscripts, abstracts and posters for congresses and external publication.

Responsibilities include:

• Lead and direct all aspects of critical writing activities within Annexon, working cross-functionally to develop and produce high-quality deliverables such as clinical study protocols, IBs, CSRs, INDs/CTDs/amendments, analysis and development plans, safety updates and annual reports, narratives/summaries, briefing books, and additional Research/Pre-Clinical/CMC, Clinical and Regulatory documents in support of our programs.

• In partnership with cross-functional teams, critically analyze and interpret non-clinical and clinical data (internal and external) to develop crucial strategy, conclusions, and messaging. As needed, perform literature and scientific database searches in support of analyses and development of background summaries.

• Participate on teams as a key thought leader to develop strategy and…

Skills asked for

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