Senior Office & Operations Leader - Events & Culture

Sei Labs; New York (NY); On-site; USD 110,000 - 135,000; Full time

Job summary

Sei Development Foundation is seeking an experienced generalist to run our physical office in NoHo and act as a go-to operator across the business. You’ll balance operational excellence with hospitality, hosting offsites, team gatherings, and daily office life.

You’ll own workplace experience, provide executive support where needed, and work 5 days a week on-site in Manhattan, bringing builder’s mindset to get things done with minimal supervision.

Qualifications

• 5-10 years in operations, executive support, chief of staff, office management, or similar roles.
• A true generalist comfortable handling planning, onboarding, expenses, and day-to-day tasks 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.

Responsibilities

• Provide EA-style support: calendar management, travel logistics, meeting prep, and follow-through.
• Support recruiting logistics: candidate communication, onsite visits, and candidate experience.
• Run new-hire onboarding: equipment, accounts, and access, plus first-day welcome.
• Support finance ops: expense management, invoices, vendor management, budget tracking.
• Take on cross-functional special projects and process improvements (new systems, audits, workflows).
• Run daily office operations: front-of-house, mail, supplies, and upkeep.
• Manage vendor and landlord relationships: sourcing, contracts, renewals, service quality.
• Be the first contact for employee requests and office issues; resolve or escalate as needed.
• Manage facilities: space planning, repairs, equipment, safety compliance.
• Own the office budget: track spend, negotiate pricing, cost-saving opportunities.
• Plan and run team events: offsites, happy hours, gatherings.
• Coordinate company-wide moments like all-hands and milestone celebrations.
• Build in-person rituals that make the office the community center.
• Gather employee feedback and improve the workplace experience.

Skills

Operations management

Executive support

Office management

Vendor management

Budgeting

Event planning

Project management

Communication

On-site operations

Tech fluency

Tools

Google Workspace

Slack

Notion

Job description

Sei Development Foundation is seeking an experienced generalist to run our physical office in NoHo and act as a go-to operator across the business. You’ll balance operational excellence with hospitality, hosting offsites, team gatherings, and daily office life.

You’ll own workplace experience, provide executive support where needed, and work 5 days a week on-site in Manhattan, bringing builder’s mindset to get things done with minimal supervision.