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TMThe MISSION Group logo

The MISSION Group

London, GB

Account Executive.

SALES & MARKETING

We’re looking for an Account Executive with a proactive, can-do attitude to join the team working on one of our largest and most high-profile accounts – Post Office.

This is a fantastic opportunity to grow your career within an established full-service creative agency, playing a key role in delivering integrated, impactful campaigns across a broad range of projects.

Working within a highly talented and collaborative team, you’ll play an important role helping to deliver high-quality creative and marketing campaigns from brief through to completion. Working closely with clients and internal teams, you’ll support the coordination of projects, assist in the administration of creative and studio workflows, maintain accurate reporting, documentation, and financial processes, and help ensure work is delivered on time, on brief and to the highest standard.

This role offers a strong foundation for progression within account management and is an exciting opportunity for someone who thrives in a fast-paced environment and enjoys building strong partnerships both internally and externally.

The role is hybrid with a London office base (minimum 3 days/week), but we’re open to discussing individual flexibility needs.

About Bray Leino

Bray Leino is a full-service creative agency and part of The MISSION Group Plc. For more than 50 years, we’ve been driven by the belief we now call Create Better: finding better answers to complex business and marketing problems, creating better customer experiences and delivering better outcomes for ambitious brands.

Today, more than 300 specialists bring together strategy, creativity, technology and media to help clients, across the UK and internationally, navigate change, unlock growth and turn ideas into effective work at scale.

At Bray Leino we bring recognised depth to retail, automotive, food & drink, industrial B2B, healthcare, and professional, financial & utility services, where specialist knowledge leads to more effective thinking, creativity and results.

About Post Office

Post Office is one of Bray Leino’s largest and most high-profile account, placing us at the centre of one of the UK’s most recognised and trusted brands. As lead creative agency, we drive the brand’s strategy, creative vision and end-to-end production across owned and paid channels including advertising, social, digital, in-branch, customer experience, web and email communications. It’s a broad, fast-moving remit with real scale, impact and visibility.

Key responsibilities

  • Support the end-to-end delivery of campaigns and projects from client brief through to final asset delivery

  • Assist in the development of clear and inspiring creative briefs for internal teams

  • Coordinate with Creative, Studio, Production, Digital and other specialist teams to ensure work progresses smoothly and deadlines are met

  • Monitor project progress and proactively flag risks or delays

  • Maintain clear and professional communication between clients and internal teams

  • Build strong working relationships with clients, responding promptly and professionally to requests

  • Prepare agendas, status reports, contact reports and meeting notes

  • Organise and support client meetings and presentations

  • Assist with budget tracking, purchase orders, invoicing and financial administration

  • Accurately complete timesheets and maintain job management systems

  • Conduct research into client sectors, markets and competitors where required

  • Contribute positively to team meetings and wider agency initiatives

  • ·Assist in the administration of workflows managed through JIRA project management platform, ensuring accurate workflows, timely updates and efficient issue resolution

  • Provide administrative support within Ziflow review platform, ensuring correct review and approval flows

Skills and experience

  • Experience working within a creative or studio project delivery team or marketing agency

  • Excellent communicator with strong written and verbal communication skills

  • Highly organised with exceptional attention to detail, with experience maintaining project documentation, trackers, and delivery processes

  • Strong interpersonal skills

  • Collaborative team player who contributes to team culture

  • Proactive, solution-focused mindset

  • Proficient in Microsoft Office

  • Experience using digital delivery platforms such as JIRA or Ziflow would be a beneficial but not essential

  • Commitment to ongoing learning and development

Benefits

We believe our team does their best work when they feel supported, valued and fulfilled. That’s why we offer a comprehensive benefits package and development opportunities, including:

  • Hybrid working model (3 days in office, 2 days remote)

  • Generous holiday allowance

  • Workplace pension with employer contributions

  • Health cash plan and life insurance

  • Cycle to Work scheme

  • Interest-free season ticket loan

  • Access to MISSION Discovery, our bespoke learning platform

  • Room to Grow career development programme with regular coaching

  • Open approach to flexible working conversations

  • Wellbeing support including:

  • Mental health first aiders

  • 24/7 counselling and advice helpline

  • Agency social events

We are proud to be a Disability Confident Committed (Level 1) Employer and are committed to ensuing our recruitment process is inclusive and accessible to all.

#LI-Hybrid

Pay
Not stated
Where
London, GB
Work
Not stated
Type
Not stated
Posted
21 Oct, 2026
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