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Senior Administrative Assistant/Executive Assistant


Work Location

Corporate Headquarters (South San Francisco, CA) – Onsite

Position Summary

Annexon is looking for a highly motivated Senior Administrative Assistant to help support our growing team. We’re a small group but growing fast and need someone who is willing and able to jump in wherever needed.


  • Proactively manage and maintain executives’ calendars identifying and resolving scheduling conflicts as they arise
  • Scheduling/coordinating internal and external meetings/conference calls across multiple time zones
  • Handle materials of a confidential nature with discretion and professionalism
  • Interaction w/ KOLs and high-level external executives
  • Book domestic and foreign travel for executives and assist with expense reports
  • Coordinate conference registrations/travel
  • Assist w/ Visa applications for international travel
  • Schedule and facilitate candidate interviews including travel coordination when needed
  • Assist with meeting setup/break down
  • Facilitate lunch meetings and catering requests
  • Assist with Facilities & IT related issues
  • Special projects and provide back-up to EA as needed
  • Strong commitment to confidentiality and accustomed to handling sensitive documents and information

Skills & Requirements:

  • 8-10 years’ experience in an administrative support role with at least 4-5 years supporting senior level staff members/C-Suite members
  • Prior experience in life sciences sector is highly preferred, not required
  • Proficiency in MS Office, Outlook Calendar required
  • Detail oriented, reliable and motivated
  • Exceptional communication and organization skills
  • Experience working at a start-up and/or in a fast-paced office environment strongly desired
  • Self-starter able to function at a high level with general instruction
  • Team-oriented, can-do attitude and desire to be productive contributor to the team (no job too big or too small)
  • Proactivity and willingness to jump in when needed is essential


  • BA/BS Diploma or equivalent (required)

Company Summary

Annexon Biosciences (Nasdaq: ANNX) is 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. Annexon’s 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, Annexon is rigorously advancing its mid-to late-stage clinical trials to bring new potential treatments to patients as quickly as possible. To learn more visit

EEO Employer – Annexon highly values Diversity, Equity, Inclusion and Belonging

Annexon Biosciences is an Equal Opportunity Employer and does not discriminate against any employee or applicant for employment based on race, color, religion, national origin, age, gender, sex, ancestry, citizenship status, mental or physical disability, genetic information, sexual orientation, veteran status, or military status. We are proud to promote a work environment where everyone, from any background, can do their best work.

Staffing Agencies

Annexon Biosciences does not accept unsolicited agency resumes and will not pay fees to any third-party agency or firm that doesn’t have a signed agreement with Annexon Biosciences. Please do not send agency CVs/resumes through Annexon’s website or Annexon Employees.  Inquiries must be sent to with the Subject Heading:  Staffing Agency Request.

Annexon is an equal opportunity employer & prohibits unlawful discrimination based on race, color, religion, gender, sexual orientation, gender identity/expression, national origin/ancestry, age, disability, marital & veteran status.