Executive Assistant in Harrow

About You

As Executive Assistant, you'll support our CEO and CTO in a fast-moving and growing Deep Tech start-up.

You'll be a trusted support of the founders, managing diaries, inboxes, travel and priorities so our leadership can focus on what matters most.

About Standard X

There is infrastructure that defines eras.

The steam engine made the industrial world possible.

The internet created an economy.

Standard X is building the next one.

Some of the most essential materials on Earth are also the rarest.

Isotopes are the invisible backbone of modern life - curing cancer, keeping industrial systems resilient and fuelling the fusion reactors that will power the next century.

Yet the infrastructure that produces them is ageing, fragmented and increasingly unable to keep up with demand.

We're a world-class team of nuclear engineers, deep tech operators and doctoral-level scientists building the UK's first isotope refinery: a single proprietary platform, deployable anywhere, producing the full portfolio of critical isotopes at scale - turning chronic scarcity into abundance.

Exceptional team.

Massive problem.

If you want to work on something that matters, really matters, this is it.

• Key Objectives
• Provide comprehensive administrative support to the CEO, CTO, and wider team, including diary management, inboxes, global travel coordination, and end-to-end meeting organisation, including investor and fundraising interactions.
• Act as a trusted point of contact for the executive suite, managing communications and screening enquiries so priorities are handled efficiently.
• Oversee day-to-day office operations, ensuring the smooth running of the workplace and its services.
• Move fluidly between executive support, travel coordination, expenses and office operations as priorities shift.
• Your Responsibilities
• Executive Support
• Provide comprehensive administrative support to the executive suite and ad hoc to the wider team, including diary management and inboxes
• Act as a trusted point of contact for the CEO and CTO, managing inbox and communications, screening enquiries and ensuring priorities are handled efficiently
• Meetings & Travel
• Organise and support meetings end-to-end, including scheduling, agenda preparation, minute taking, and tracking actions to completion, including investor and fundraising interactions
• Manage end-to-end global travel including detailed itineraries
• Expenses & Office Operations
• Submit executive expenses every two weeks
• Oversee day-to-day office operations
• Coordinate office services including catering, supplies, maintenance, and couriers as needed, working with the Operations and People Manager
• Documentation & Adaptability
• Draft correspondence and update presentations and reports as needed
• Take ownership of well-defined tasks, staying proactive and resourceful as priorities shift

Requirements

• Proven experience in a similar role within a start-up or fast-paced environment
• Previous experience supporting multiple executives
• Demonstrable experience with diary management
• Experience working with expenses and financial reporting
• Strong organisational and multitasking skills with a keen eye for detail
• Excellent written and verbal communication skills
• Ability to work independently and manage competing priorities effectively
• High agency and a strong sense of urgency, taking ownership and driving things forward without waiting to be asked
• A people and relationship focused approach, building trust easily across the team and with external stakeholders
• Ability to handle confidential information with discretion and professionalism
• Ideal Experience
• Experience in event coordination
• A bachelor's degree

We know great candidates rarely match every point on a list like this.

Benefits

• Private Health Cover, with the option to add dependants.
• Life Assurance (Death in Service) at 4x salary.
• Salary sacrifice pension, with 4% employer contribution.
• Cycle to Work Scheme.
• EMI Share Options.
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