Senior Administrative Assistant

Company Description

Guardant Health is a leading precision oncology company focused on guarding wellness and giving every person more time free from cancer. Founded in 2012, Guardant® is transforming patient care and accelerating new cancer therapies by providing critical insights into what drives disease through its advanced blood and tissue tests, real-world data and AI analytics. Guardant tests help improve outcomes across all stages of care, including screening to find cancer early, monitoring for recurrence in early-stage cancer, and treatment selection for patients with advanced cancer. For more information, visit guardanthealth.com and follow the company on LinkedIn, X (Twitter) and Facebook.

Role Description

This is a full-time on-site role responsible for managing administrative, operational, and financial activities to ensure smooth day-to-day office operations. The role includes executive support, office logistics, travel coordination, and financial administration (invoices and expenses).

Responsibilities

• Manage executive calendars, meetings, and communications to ensure effective time management
• Oversee office administration, including supplies, facilities, and day-to-day operations
• Coordinate travel arrangements and related expense reporting
• Serve as the primary point of contact for calls, visitors, and general inquiries
• Manage logistics, including deliveries, shipments, parking, and vendor coordination
• Coordinate food orders and catering for meetings and company events
• Oversee office and lab maintenance, repairs, and infrastructure to ensure a fully functional work environment
• Manage the full invoice lifecycle, including collection, review, coding, and accurate record-keeping of all incoming and outgoing invoices
• Coordinate supplier payments, including approvals, scheduling, and follow-ups to ensure timely and accurate processing
• Support financial operations in collaboration with the accountant, including expense monitoring, reporting and budget tracking, and day-to-day banking activities such as credit card reconciliation and issue resolution.
  
  

• Bachelor’s degree or equivalent work experience
• 3+ years of experience in office management, operations, or administrative roles, preferably in a dynamic environment
• Strong organizational and multitasking skills, with the ability to manage multiple priorities and meet deadlines
• Experience with financial operations, including invoice management, expense tracking, and basic bookkeeping processes
• Excellent communication skills, both written and verbal, with a professional and service-oriented approach
• High attention to detail and accuracy, particularly in financial and administrative tasks
• Ability to work independently, take initiative, and handle sensitive information with discretion
• Experience coordinating vendors, logistics, and office operations
• Strong problem-solving skills and ability to adapt in a fast-paced, evolving environment
• Proficiency in Microsoft Office and Google Workspace; experience with financial/ERP systems is an advantage