Senior Executive Assistant to CMO

Senior Executive Assistant to the Chief Marketing Officer

London - Office based

About Mimecast

The work people build is worth protecting, and it's harder to protect than it used to be. AI agents now move at machine speed with human-level access, and a small slip-up can become a very public one. We disrupt cybercriminal activity before that happens. We think fast, go big, and always demand more of ourselves. We work hard, deliver, and repeat. We grow with real determination and put success well within reach. We push each other to be better and expect to be pushed back, in a community built on respect, where everyone is counted. Work Protected.

Overview

As Executive Assistant to the Chief Marketing Officer (CMO), you’ll keep a high-volume, externally focused executive office running smoothly. You’ll manage the CMO’s calendar, inbox, travel and priorities, and build systems that keep requests, decisions and actions on track.

The CMO leads a global team across brand, communications, analyst relations, events, demand generation and partner marketing, and spends close to half the week with analysts, journalists, customers and partners. As their right hand and first point of contact, you’ll anticipate what’s needed, handle sensitive information with discretion and adapt as priorities change.

This role is based in London, with three to four days a week in the office in line the requirements of the business.

What You'll Do

- Manage the CMO’s calendar across time zones, prioritising meetings, protecting focus time and anticipating conflicts.
- Triage the CMO’s inbox and act as the first point of contact for the office, making sure important messages receive timely attention.
- Build and maintain systems for tracking inbound requests, decisions and action items, following each through to completion.
- Gather information from stakeholders and prepare meeting materials, including briefing notes and presentations. Draft and edit emails, letters and reports on the CMO’s behalf.
- Plan international travel in line with procurement guidelines, balancing schedules and time zones and adapting when plans change.
- Coordinate analyst briefings, press interviews, customer meetings, conferences and speaking engagements with the communications, events and sales teams, and create a welcoming experience for visitors to the London office.
- Prepare monthly expense claims in Navan and manage invoices and purchase orders in NetSuite, keeping records accurate and processing timely.
- Organise marketing leadership meetings, quarterly reviews, all-hands and offsites, including agendas, materials and follow-up actions.
- Coordinate onboarding for new joiners with HR and IT, including equipment, system access and workspace set-up.
- Develop templates and consistent file-sharing practices, help the team get the most from Microsoft 365, Salesforce and Zoom, and lead ad hoc projects.

What You'll Bring

- Proven experience supporting a C-suite or senior executive, with the judgement to prioritise competing demands and work autonomously.
- Strong organisational skills and experience building systems to manage multiple priorities, with close attention to detail and timely follow-through.
- A genuine enthusiasm for helping a leader deliver their vision by ensuring they have the information and resources they need.
- A calm, positive and welcoming manner, with excellent written and verbal communication across internal and external stakeholders.
- A track record of handling confidential board, financial and people information with discretion.
- A security mindset: a thorough understanding of data protection and privacy best practice, including the phishing and impersonation risks faced by executive assistants.
- The adaptability to handle ambiguity and last-minute changes while keeping work on track.
- Advanced Microsoft 365 skills, including Outlook, Teams, Word, Excel and PowerPoint, and confidence using AI tools.
- An interest in cybersecurity and how AI is changing the way people work.
- Experience supporting an executive in a heavily external-facing role is preferred.
- A degree or equivalent professional experience is preferred.
- Experience with Navan, Concur, NetSuite or Salesforce is a plus.

The base salary range for this position is £60,000−£90,000 plus benefits. This range represents the minimum and maximum new hire compensation for this role. The position may also be eligible for incentive plans and additional benefits, in accordance with company policy and local regulations. Our salary ranges are determined by role, level, and location with individual compensation also dependent on factors such as qualifications, experience, and skills. Final offers will reflect these considerations and may vary accordingly.

Belonging at Mimecast

Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course.

We’re proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.

We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.

Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.