Administrative Assistant

Location: South San Francisco, CA (contract)

Position Summary:

We are seeking an experienced Administrative Assistant to provide high-level administrative and operational support to a fast-paced team in a start-up environment. This role is for someone who is comfortable being hands on, adaptable, and scrappy, thriving in an environment where priorities shift quickly, solutions are expected (not just identified), and efficiency is essential to keeping the business moving forward.

The ideal candidate brings seasoned judgment, strong organizational instincts, and the ability to think several steps ahead, understanding impact workflows, teams, and the overall rhythm of the office. They are proactive, resourceful, and willing to jump in wherever needed to support both leaders and the broader business as it grows. This person remains calm under pressure and has a proven track record of supporting teams in similarly fast-moving environments.

Beyond operational excellence, this role is also an essential contributor to our workplace culture. As a member, you will help foster an engaging, positive, and collaborative office environment, one that balances professionalism with energy and fun.

Key Responsibilities include but are not limited to:

• Calendar & Scheduling: Manage and coordinate complex calendars, meetings, conference rooms; account for travel time, time zones, and logistical considerations
• Accounting: Monitor and maintain the office and event budgets, and reconcile expenses
• Office Logistics: Order supplies, upkeep and maintain order in the office, liaise with building management, manage weekly office lunch, plan, coordinate, and manage logistics for company meeting and events, update and maintain logs, assist with inbound/outbound deliveries, assist with onboarding new hires, and serve as the “go to” person for office support
• General Support: Provide general administrative support to ensure smooth departmental operations. Serve as one of the primary point of contacts for internal and external communications
• Proactive Support: Anticipate needs, prioritize conflicting requests, troubleshoot issues, manage workflows, handle sensitive information with discretion and sound judgement

Required Qualifications:

• Problem-solving mindset and critical thinking skills, with ability to see the big picture
• Ability to prioritize competing priorities independently and effectively
• Possess the ability to work collaboratively and independently
• Proactive and creative, with a no task is too big or too small mindset
• Excellent communication skills, maintain calm, and unwavering professionalism. Comfortable communicating with all levels. Serve as a liaison between executives and stakeholders across the company
• Exceptional attention to detail, organized, and a professional commitment to excellence
• Proficient in Microsoft office and other project management tools
• 3-5 years of experience in similar environment
• Ability to work onsite at our South San Francisco office during scheduled hours
• Ability to lift or pull 25 lbs

Preferred Qualifications:

• Experience in a start-up environment

Duration: 12-month contract (with potential extension or conversion)

Pay Rate: $75,000-$80,000 ($30-40/hour)

TRexBio is a clinical stage biotechnology company leveraging cutting edge computational biology tools, a focus on human tissue, and expertise in immunobiology to develop revolutionary therapeutics for inflammatory diseases. Our powerful ‘deep biology’ discovery engine maps human tissue Treg behavior to disease processes, allowing us to identify and characterize novel targets for therapeutic intervention. Leveraging this platform, we are building a broad portfolio of novel therapies that modulate the immune system to restore human tissue immune homeostasis.

Our Culture:

At TRexBio, you will have the opportunity to work with amazingly smart humans who strive to make the world a better place. In addition to our team-centric culture, we believe that your individual creativity will help us to be our best. Our staff happy hours, organized by our Culture Club, bring us all together in creative and social activities. Our colleagues admire and respect one another. We celebrate our wins, update company news and acknowledge each other’s achievement weekly and monthly at all company meetings that celebrate our work and our people.

TRexBio is proud to be an AA/EEO employer and all qualified candidates will receive consideration without regard to characteristics protected by applicable local, state, or federal law, such as race, color, sex, age, religion, national origin, physical or mental disability, pregnancy, marital status, veteran or military status, genetic information, or sexual orientation.