Executive & Administrative Assistant

ThreeO LLC is an AI and defense technology startup building and commercializing advanced artificial intelligence, autonomy, and related technologies for U.S. and international markets.

We are looking for a highly organized, resourceful Executive & Operations Assistant to work closely with company leadership and help keep a fast-moving startup organized and effective. This is a hands-on role with exposure to business development, technology, government and defense customers, international partners, and company operations.

The position is expected to begin at approximately 30 hours per week and is based in Darien, Connecticut, with some remote work possible. The person joining ThreeO at this stage will be well positioned to grow in responsibility and opportunity as the company builds its business and team.

Responsibilities

• Attend meetings with senior leadership, track and execute on items for follow-up
• Manage calendars, meetings, and correspondence
• Schedule domestic and international meetings, travel, and trips; some travel will be required
• Assist with RFPs, RFIs, proposals, government solicitations, and customer requests, including tracking deadlines and assembling submission materials.
• Organize and help prepare sales, technical, customer, partner, and investor presentations and pitch materials.
• Maintain sales collateral, technical materials, customer information, and proposal resources.
• Coordinate meetings involving ThreeO leadership, customers, technical teams, investors, and international partners.
• Assist in organizing meetings involving ThreeO's business partners and affiliated ventures, including CODA.
• Track action items, deadlines, documents, signatures, and follow-up activities.
• Provide general administrative and operational support wherever needed in a growing startup.

Qualifications

• Strong organizational and communication skills, attention to detail, sound judgment, and the ability to manage multiple priorities independently.
• Comfort with Microsoft Office or Google Workspace, particularly Word, PowerPoint, Excel, email, and calendar tools.
• Experience in an executive-assistant, operations, proposal, sales-support, technology, government-contracting, aerospace, defense, or startup environment is helpful but not required.
• Experience supporting RFPs, preparing presentations, or coordinating international travel is a plus.