Business Operations & Workplace Manager

About the role

Sei Development Foundation is looking for an experienced, proactive generalist to run its physical office in NoHo and act as a go-to operator across the business. The role sits within the Operations team but is owned by the person filling it, with no facilities team behind them. It is a 5 days a week on-site position in Manhattan, balancing operational excellence with hospitality and community.

Key responsibilities

• Business operations: provide EA-style support (calendar, travel, meetings, follow-through); support recruiting logistics; run new-hire onboarding; support finance ops (expenses, invoices, vendors, budget tracking)
• Office operations: run daily office operations, own vendor and landlord relationships, manage facilities needs, and own the office budget
• Events and culture: plan and run team events and company-wide moments, build in-person rituals, and gather employee feedback

Required profile

• 5-10 years in operations, executive support, chief of staff, office management or a similar role
• Generalist who can move between planning an offsite, reconciling expenses and onboarding a new hire in the same day
• Proven ability to work independently as the sole owner of an area
• Experience planning events from start to finish
• Able to work on-site 5 days a week

Required skills

• Vendor management and budgeting
• Workplace and business tools such as Google Workspace, Slack, Notion, expense/procurement and HR platforms
• Fluency in using AI to work faster