Executive Assistant

Job Title: Executive Assistant

Location: Hybrid

AboutRadiant

Radiant is redefining how AI infrastructure is built.

We design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale. Our infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems designed for the most demanding environments.

We are not building a generic cloud. We are building purpose-built AI infrastructure - from powered land, to compute, to software .

As we scale our platform and expand our engineering organisation, we are looking for leaders who can build strong teams, uphold high standards, and deliver reliably at pace.

Job Summary:

As Executive Assistant, you'll support members of Radiant's Leadership Team and keep the business running smoothly day to day, working alongside the Executive Assistant to our President & CEO.

You'll manage busy diaries, travel and meetings, organise team events, and be a trusted first point of contact for the leaders you support. You'll also cover for the CEO’s office when required.

This is a hands-on role in a fast-growing company, ideal for someone who is organised, proactive and loves making busy people's lives easier.

Key Responsibilities:

Support our leaders

• Manage complex diaries for members of the Senior Leadership Team, prioritising time and resolving clashes.

• Organise travel, visas and itineraries across the UK, Europe, India and the US.

• Prepare meetings: agendas, papers, notes and follow-up actions.

• Process expenses and handle day-to-day admin for the leaders you support.

Run meetings and events

• Coordinate internal & external stakeholder meetings, and visits from customers and partners.

• Organise team offsites & workshops, managing logistics, budgets, and vendors from planning through delivery.

Keep things running

• Be the first point of contact for leadership enquiries, handling them with care and discretion.

• Work with People, Ops and the office team on onboarding new leaders, office logistics and suppliers.

• Cover for the Executive Assistant to the CEO when required.

• Improve how we work: templates, processes and tools that save everyone time.

Qualifications:

• Experience as an Executive Assistant or in a similar role, supporting senior leaders or multiple executives.

• Excellent organisation, with an eye for detail and the ability to juggle competing priorities.

• Confident communicator, comfortable working with senior leaders, customers and partners.

• Complete discretion with confidential information.

• Proactive: you spot what's needed before you're asked.

• Confident with Google Workspace, Slack and travel and expense tools.

• Experience in a fast-growing, international business working across multiple timezones.

What You Bring:

• Organisation: You keep many plates spinning, and none of them drop.

• Anticipation: You think a step ahead of the people you support.

• Discretion: You handle sensitive information with care.

• Service: You make busy people's lives easier, and enjoy it.

• Ownership: You take responsibility for getting things done, start to finish.

Our values:

• Set the standard: Every single day, you spot opportunities to constructively shake things up

• Inspire the change: There’s no blueprint for the future. You’ll embrace challenges and change

• You’re real and you’re true to yourself: We cherish and celebrate diversity so you’ll feel right at home whoever you are and whoever you’re talking to, you treat everyone the same.

Why should you join us?

What sets us apart is our blend of modern technology, competitive benefits, and an open, welcoming work culture that enables our people to thrive.

Here are just some of the great things you can expect from us:

• 25 days of annual leave

• A culture that emphasises results over hierarchy, process & ego: we place great emphasis on the quality, ingenuity and creativity of work.

• Open communication, regular feedback: we value smooth collaboration, direct and actionable feedback, and believe that leading with empathy and a growth mindset makes us better together.

• Learning Time: we all have dedicated learning time to focus on new skills, projects or interests that lay outside of your day-to-day job.

• Health & Wellbeing: we want everyone to feel healthy and happy, so we offer private medical insurance via Bupa.

• Cycle to Work Scheme: we're committed to building a sustainable business, so we encourage cycling to work.

• Gympass subscription to a variety of gyms and wellbeing apps

• Participation in the company shares program

• Enhanced parental pay & leave