Business Operations & Workplace Manager
Confirmed on the employer's own hiring board on Nov 10, 2026. First seen by Alion on Nov 10, 2026. Sei scores B on the Alion truth index.
About the role
Sei Development Foundation is seeking an experienced, proactive generalist to be a go-to operator across the business and run our physical office in NoHo. This role is ideal for someone who thrives in dynamic environments, loves solving problems independently, and wants to contribute to a fast-moving blockchain company building at the frontier of web3.
We believe the best ideas, strongest relationships, and real sense of belonging come from time spent together. So when our team comes into our office in Noho, we want it to feel like the center of our community. It’s a beautiful space in one of New York’s best neighborhoods, where we do our best work together, host offsites and team gatherings, and celebrate wins.
We’re looking for someone to make it feel alive, and to help the business run smoothly behind the scenes. You’ll create the experiences that make people want to walk through the door, and you’ll also step into whatever the team needs: executive support, events, people operations, finance operations, and general business operations. You’ll balance operational excellence with real hospitality, and culture and community will always be your north star.
You’ll be part of the Operations team, but this role is yours to run. You’re our sole owner of workplace experience, with no facilities team behind you, so you’ll bring a builder’s mindset and the drive to get things done yourself. As a 5 days/week on-site role, you’ll be the steady presence in the office, welcoming people on the days they come in and making each one count.
What you’ll do
Business operations
Provide EA-style support as needed: calendar management, travel and logistics, meeting prep, and follow-through
Support recruiting logistics: candidate communication, scheduling on-site visits, and a great candidate experience
Run new-hire onboarding, including equipment, accounts, and access, and delivering a welcoming first day
Support finance ops: expense management, invoices and vendor management, and budget tracking
Take on cross-functional special projects and process improvements, such as setting up new systems, running audits, and building workflows
Office operations & vendors
Run daily office operations: front-of-house, mail and packages, snacks and supplies, and general upkeep
Own vendor and landlord relationships, including sourcing, contracts, renewals, and service quality
Be the first point of contact for employee requests and office issues, and resolve them yourself or find who can
Manage facilities needs such as space planning, repairs, equipment, and safety compliance
Own the office budget: track spend, negotiate pricing, and flag cost-saving opportunities
Events & culture
Plan and run team events, including offsites, happy hours, and gatherings
Coordinate company-wide moments such as all-hands and milestone celebrations
Build in-person rituals and traditions that make the office the center of our community
Gather employee feedback and keep improving the workplace experience
What we’re looking for
5-10 years in operations, executive support, chief of staff, office management, or a similar role
A true generalist: comfortable going from planning an offsite to reconciling expenses to onboarding a new hire in the same day
Track record of working independently as the sole owner of an area
Strong vendor management and budgeting skills
Experience planning events from start to finish
Highly organized and proactive: you spot problems before they’re reported
Excellent judgment and discretion with sensitive information
Clear, warm communicator who treats colleagues as customers
Comfortable in a small company where you’ll wear many hats
Able to work on-site at our Manhattan office 5 days a week
Experience with workplace and business tools (e.g., Google Workspace, Slack, Notion, expense/procurement, HR platforms), and fluency in using AI to work faster
Nice to have
Passion for web3 and interest in blockchain ecosystems
Experience at a startup or high-growth company