Executive Assistant & Workplace Manager

RZR is an AI-native advertising platform built for the next era of performance marketing. The company operates at the intersection of machine learning, programmatic media, and full-funnel mobile growth, powering campaigns for ambitious advertisers and delivering outcomes at scale.

RZR is seeking a seasoned Executive Assistant & Workplace Manager to become the backbone of its San Francisco office. This dual-scope role focuses primarily on high-trust executive support for the C-suite, including calendars, travel, and communications, while also owning the physical office, vendors, supplies, events, and day-to-day facilities.

This brand-new role offers the opportunity to build systems and standards from scratch. The successful candidate will work onsite five days per week and combine the discretion and judgment of a seasoned executive assistant with the operational ownership required to run a function independently.

The role provides direct daily partnership with the CEO and COO, broad operational scope, high visibility, and the opportunity to help shape RZR's San Francisco headquarters during a period of rapid growth.

• 8+ years of experience as an Executive Assistant supporting C-level or senior leadership
• Experience owning an office space or facilities function, including vendor management
• Demonstrated ability to manage complex calendars and travel across competing priorities
• High discretion and judgment handling confidential executive information
• Excellent written and verbal communication
• Based in San Francisco and able to be onsite five days per week
• Experience in a startup or scale-up environment
• Vendor negotiation experience
• Event or offsite planning experience
• Familiarity with expense and travel tools such as Ramp, Expensify, or Navan

• Manage complex, shifting calendars for senior executives, proactively resolving conflicts and prioritizing time against business needs
• Own end-to-end travel planning and expense reporting for the executive team
• Serve as the primary point of contact and gatekeeper for executive leadership, screening requests and coordinating cross-functional communications
• Manage the San Francisco office day to day, including vendor relationships, supply inventory, and maintenance issues
• Plan and execute internal events, offsites, and team gatherings hosted out of the San Francisco office
• Own office budget tracking and vendor invoicing in partnership with Finance
• Prepare materials, agendas, and follow-ups for executive meetings
• Act as the go-to person for all in-office matters, ensuring a professional and functional workplace experience for onsite employees