Executive Assistant to the Founder

Undeniable helps agency owners doing £50k to £150k a month raise their prices, install a proper sales process and build a business that can scale or sell. Its 8-week Sprint installs the Price Leverage Model, followed by ongoing support for the best clients.

Undeniable is a small, fast-moving team with ambitious targets, direct communication and high standards. The business is targeting $3 million in the next 12 months.

The Executive Assistant will work closely with founder Nigel to manage calendars, administration, client communication and follow-ups. This is a highly involved role requiring daily interaction with clients and the founder, as well as the ability to adapt as the business grows.

The role is remote, follows UK working hours and is offered as a full-time contractor position with a one-month trial. The successful candidate can grow from Executive Assistant to Senior EA and Operations Lead, and potentially Chief of Staff.

• 3+ years of experience in a startup supporting a founder directly.
• Background in an online business, ideally an agency or coaching business.
• AI-native approach, with daily use of Claude or a similar tool and the ability to demonstrate how it is used.
• Confidence using Google Workspace, Slack, WhatsApp and Stripe.
• Clear, confident written and spoken English; the role involves daily client calls.
• Ability to hold people accountable, including the founder.
• Ability to chase tasks persistently and respond quickly.
• Strong problem-solving skills and initiative without requiring step-by-step instructions.
• Sociable, steady and confident when working with clients, the team and a strong personality.
• Desire to grow quickly and work comfortably in an evolving, challenging environment.
• Bonus experience with events, CRM systems, ClickUp, Zapier, Webflow, Typeform, QuickBooks, Wise, Riverside, LinkedIn or YouTube.

• Onboard new clients, book their calls, and send agendas and recordings.
• Take payments and chase late payments by message or phone.
• Keep the CRM up to date.
• Manage client communications in Slack and WhatsApp.
• Manage the founder’s calendar and inbox.
• Give the founder’s day structure and protect time for focused work.
• Chase outstanding tasks and hold the founder and team accountable.
• Support the founder’s personal life and day-to-day administration.
• Provide sales and marketing support.
• Manage projects and coordinate activities across the business.
• Ensure new clients are onboarded, scheduled and paid without requiring the founder’s involvement.
• Run events and support team coordination as the role develops.