Role OverviewSirenOpt is looking for an Executive Assistant to support our leadership team and the broader company. This is a company-wide role - you will work across functions to ensure our leaders and teams can operate efficiently and effectively with clear communication, organization, and scheduling.
You will serve as a central operational resource for the organization. A majority of your time will be dedicated to supporting key individuals including the CEO and other leaders with scheduling, communications, and administrative tasks; the remainder will consist of providing general company-wide administrative support.
What You'll Do- Manage complex calendars and scheduling for key company leaders - coordinating across time zones and competing priorities with speed and good judgment
- Arrange domestic and international travel, including flights, hotels, ground transportation, and itinerary logistics
- Support executive communications - drafting, formatting, and organizing emails, meeting agendas, follow-ups, and recaps
- Coordinate meetings and events, including customer visits, internal team offsites, and other logistical activities
- Manage expense reporting and reconciliation using Expensify and Brex
- Maintain shared documents, files, and records in Microsoft 365 and Confluence
- Handle general office and corporate administrative functions - vendor coordination, office supplies, onboarding logistics, and other operational needs as they arise
- Field ad hoc requests from across the company and act as a reliable resource for teams that need administrative support
What We're Looking For- Bachelor's degree or equivalent
- 3-6 years of experience in an administrative or executive assistant role, ideally supporting multiple principals simultaneously
- Demonstrated ability to manage competing priorities across different leaders or departments - including an adept understanding of how to triage, escalate when needed, and stay ahead of problems
- Experience in a startup or fast-moving environment where processes are still being developed and implemented
- Strong organizational skills and attention to detail
- Strong written communication skills; able to draft professional correspondence on behalf of executives
- Proactive and able to anticipate needs before being asked and take initiative without waiting for direction when needed
- Proficient with Microsoft 365 (Outlook, Word, Excel, Teams) and comfortable picking up new tools quickly; familiarity with Confluence, Expensify, Brex, and HubSpot is a plus
- Discretion and good judgment when handling sensitive information
Why Join SirenOpt- Opportunity to make a direct impact in building a growing, mission-driven company
- Work closely with leadership and drive company organization and communication
- Fast-paced, collaborative startup environment with high ownership
- Exposure to cutting-edge technology in advanced manufacturing and AI
Base Pay Range
$75,000-$95,000 USD
Benefits- Equity and Salary compensation depends on experience
- Health, Dental, Vision plans provided
- 401k matching provided
- Time off: 20 days of PTO per year, plus approximately 15 paid US holidays per year
