Office Manager

At River AI, our mission is to create personal AI owned and shaped by each individual. To achieve this, we are building the full stack required for people and organizations to create AI models of their own—from training infrastructure and open-weight model post-training to personal hardware and next-generation interfaces.

We are scientists, engineers, and builders from the industry’s leading technology companies and AI labs. Our team has experience scaling consumer products to hundreds of millions of users and building the infrastructure behind frontier AI systems.

We're looking for an Office Manager to own the day-to-day operation of our office. This is the role that makes everything else run: visitors are greeted well, supplies are ready and re-stocked, deliveries land as expected, the space itself is safe and well-maintained, and vendors complete scheduled work. This is a hands-on, in-office position with real responsibility — you'll be the person everyone relies upon.

We're also a team that's genuinely interested in working smarter. You'll have room to utilize AI to take the repetitive parts of office operations off your plate.

• Greet clients, candidates, and guests, and make sure their visit goes smoothly from arrival to departure.
• Manage the visitor sign-in process, badges, and building access.
• Answer and route incoming calls and the general office inbox.
• Prepare conference rooms for meetings, including set-up, refreshments, and reset.

• Track inventory and reorder office, kitchen, and breakroom supplies before they run low.
• Keep common areas, supply rooms, and work spaces organized and presentable.
• Manage office equipment, from printers to conference room technology.

• Act as the primary liaison with building management and the landlord on everything from HVAC and lighting to after-hours access.
• Own the preventive maintenance calendar and log, schedule repairs, and follow issues through to resolution.
• Oversee cleaning, janitorial, and waste and recycling services, and hold those vendors to the standard.
• Manage physical security: keys, badges, access permissions, and alarm codes, including issuing and revoking them as people join and leave.
• Maintain health and safety readiness — first aid supplies, fire extinguisher and alarm inspections, emergency exit routes, and evacuation procedures.
• Coordinate seating assignments, workspace setup, and office moves or reconfigurations.
• Walk the space regularly to catch problems before anyone reports them.
• Track facilities spend against budget and flag variances.

• Receive, sort, and distribute incoming mail and packages.
• Handle outgoing shipping and courier requests, including time-sensitive deliveries.
• Coordinate catering and delivery logistics for meetings and office events.

• Serve as the primary point of contact for office vendors and service providers.
• Schedule service visits, track deliverables, and follow up on issues until they’re resolved.
• Review invoices for accuracy and route them for approval.
• Source new vendors and compare quotes when needs change.

• Support onboarding logistics for new hires, including workspace and equipment setup.
• Assist with office events, team meetings, and occasional executive support.
• Identify recurring problems and implement best practices.

• Prior experience in a role carrying a high level of responsibility — a position where you were trusted to own outcomes, handle sensitive information, and make decisions without being managed closely.
• Genuine enthusiasm for technology and AI, with a habit of finding tools that make work faster and…