Executive Business Assistant (Founder's Office)

About the Role

mBIOTA Labs is seeking an exceptionally sharp, resourceful, and detail-oriented Executive Business Assistant to support our Founder across her business interests, including mBIOTA Labs and a portfolio of real estate and other entities.

This is a full-time, in-office role based in Santa Monica and a true right-hand position within the Founder’s Office. You’ll work closely with the Founder and partner with mBIOTA’s CEO, COO, and broader team across business administration, real estate, office operations, marketing, and special projects.

The person who succeeds in this role is quick to learn, highly proactive, and exceptional at follow-through. You can take direction, understand the objective, figure out what needs to happen next, and own a task through completion. You notice details others miss, know when something should be flagged, and increasingly anticipate needs before being asked.

The range of work is intentionally broad. You might spend a morning helping resolve a state tax registration issue, then review a service agreement for one of the Founder’s properties, make sure the Santa Monica office is running smoothly, and finish the day helping prepare for a brand activation.

There is no “too small” mentality in this role. You should be as willing to call a government agency, categorize expenses, stock office supplies, or personally check that a property is ready for a tenant as you are to build an Excel model, review a contract, or manage a complex project.

For an ambitious early-to-mid-career professional, this is an unusual opportunity to gain hands-on exposure to entrepreneurship, business operations, real estate, marketing, and multi-entity management while working closely with a Founder and senior leadership team.

What You’ll Do

Founder’s Office & Business Operations

• Support the Founder across mBIOTA Labs, her real estate portfolio, and other entities, keeping administrative and operational priorities moving.
• Help administer multiple LLCs, including records, registrations, tax and employment accounts, filings, licenses, and other requirements.
• Work with government agencies, accountants, attorneys, payroll providers, and other partners to establish accounts, resolve issues, and drive matters through completion.
• Review business mail, contracts, agreements, and other documents thoughtfully, identifying important notices, deadlines, unusual terms, or decisions that need to be surfaced.
• Build and maintain Excel/Google Sheets trackers, budgets, reports, and light financial models; assist with expense categorization and financial administration.

Real Estate & Property Operations

• Support operations across the Founder’s real estate portfolio, including long- and short-term rentals, leasing, renovations, maintenance, and vendor management.
• Manage rental listings and support tenant leasing, move-ins, move-outs, and ongoing needs.
• Coordinate contractors, property managers, brokers, cleaners, and other vendors while maintaining ownership of the final outcome.
• Ensure properties are meticulously prepared for tenants and guests, personally verifying that details have been handled and the property meets the Founder’s standards.
• Review leases, service agreements, and vendor contracts, proactively flagging issues before they reach the Founder.
• Respond to urgent property matters by activating the appropriate resources and following through until resolution.

Hours & Responsiveness: This is a standard full-time role aligned with normal business hours. However, property issues can occasionally arise in the evening or on weekends, and responsiveness is expected when something urgent occurs. This does not mean personally solving every issue after hours; it means ensuring the appropriate resource is activated promptly and the matter is tracked through resolution.

mBIOTA Office, Executive & Brand Support

• Serve as the primary office administrator and key holder for mBIOTA’s Santa Monica office.
• Own day-to-day office operations, including mail, supplies, deliveries, vendors, facilities issues, and coordination with building management.
• Provide hands-on administrative and operational support to the Founder, CEO, and COO as needed.
• Support the Director of Brand with marketing projects, including social media, experiential events, brand activations, launches, and other initiatives.
• Jump into the executional details—from sourcing v…