Executive Assistant to CEO

Senior Executive Assistant to CEO (US & UK Based) | Cutting-Edge AI Tech Start-Up

Location:San Francisco

Reports to:CEO, who travels regularly between the UK and the US, and who works across both time zones

Industry:Artificial Intelligence | Technology

Type:Full-Time | Permanent

Salary and package is dependent on experience

Join an early-stage global AI Tech start-up founded by a visionary leader in the tech space, redefining the future of a specialist area of AI. As they continue a rapid growth journey, they are seeking a dynamic, highly capable Executive Assistant (EA) based in San Francisco (SF) to provide seamless support to the CEO, who travels regularly between the US (SF) and the UK (London).

This is a rare and varied opportunity to join a fast-paced, mission-driven organisation at the intersection of behavioural science and advanced AI innovation.

As the Executive Assistant to the CEO, you will act as a strategic partner and trusted right-hand, enabling the CEO to focus on scaling the business and driving strategic initiatives. Beyond traditional EA responsibilities, you will be directly involved in high-impact deliverables, including the development of pitch decks, client presentations, board updates, and key client engagement materials.

This is an exciting role for someone who thrives in a fast-paced, high-growth environment and is passionate about technology, innovation, and being close to the heart of business operations.

We’re looking for an individual who is at ease with a hybrid work arrangement, combining in-office duties with remote work during the CEO’s time in the UK.

Flexibility to work outside standard business hours, accommodating predominantly the UK time zone, is essential.

• Provide proactive and high-level administrative support to the Chief Executive Officer (CEO).
• Manage a complex and ever-changing calendar, prioritising meetings across the US, UK, and global time zones.
• Coordinate travel arrangements, itineraries, and logistics for domestic and international travel.
• Prepare and assist in the creation of high-quality deliverables, including pitch decks, client presentations, board updates, and strategic reports.
• Participate in client engagement initiatives and support key stakeholder communications.
• Actively participate in team meetings and follow up on action items.
• Act as a liaison between the CEO and internal/external stakeholders, maintaining high levels of professionalism and discretion.
• Support project management activities, tracking deadlines and deliverables.
• Handle confidential information with sensitivity and integrity.
• Anticipate the CEO’s needs and provide strategic support to ensure optimal efficiency.
• Be flexible and responsive, willing to work outside of regular hours as needed to align with UK-based operations.

• Proven experience (ideally 5+ years) as an Executive Assistant or in a similar role supporting C-suite executives, within a start-up or high-growth tech environment – essential
• Strong experience working with Google Workspace (Docs, Sheets, Slides, Drive, Calendar) — essential.
• Prior experience supporting a remote executive or working across multiple time zones.
• Exceptional organisational skills, with a strong attention to detail, are a must.
• Highly proficient in creating polished pitch decks and client-facing presentations.
• Outstanding communication skills, both written and verbal.
• High level of discretion and ability to handle sensitive information.
• Proactive, resourceful, and able to work independently with minimal supervision.
• Adaptable and comfortable operating in an agile, high-growth start-up environment.
• Flexibility to work extended or non-traditional hours to ensure seamless support.
• A genuine interest in AI, technology, and innovation.

• Equity plan consideration for the right candidate
• Be part of a revolutionary company at the forefront of AI
• Work closely with a visionary founder and leadership team on critical projects.
• Flexible remote working with opportunities for international collaboration.
• A dynamic, ambitious, and mission-driven culture.
• Competitive compensation and benefits package.