addmustard is a full-service digital agency joining up brand, technology and marketing for our clients. We work with entrepreneurial businesses to drive awareness and growth, efficiently.  For the most part, we don’t just work with our clients on one-off projects, campaigns or channels, but we bury ourselves into their businesses and work alongside them to solve fundamental commercial and digital challenges.  

Our amazingly talented team is made up of those people who do more, think more, and act more (and quite often, celebrate more…) and we are fascinated by the kind of people who get a kick out of delivering something great. 

Essentially, we want to attract great people and keep them, attract great clients and keep them, and have a lot of fun along the way.  

Simple, right? That’s where you come in.

About the team

The addmustard team is built from individuals who love a challenge, aren’t afraid to get their hands (and feet) dirty, and are genuine people wanting to learn, succeed and be part of something amazing. We nurture our talent, invest in their future, and support and care for every single person both professionally, and more important, personally – which is what creates a successful working environment for both our team and our clients. 

We are an open, supportive group who want to achieve great things together. We’re there for each other, whether it’s been a challenging day in the office or we’re celebrating one of life’s wonderful milestones together. A bold claim, but our Glassdoor reviews back it up. We’re a small team, with strong bonds.

Who we’re looking for

A tight-knit collaboration of minds and people is an essential part of our success. We want people who don’t just sit in their lane but think of the bigger picture and help others to meet their overall goal.  

We love people who get right to the nub of a problem and ask the questions that others are avoiding, as well as offering the solutions that have yet to be thought of. We’ve built (and are very proud of) our completely flat and integrated organisational structure – we don’t care where the good ideas come from, as long as they can be turned into something amazing and tangible. No idea is a bad idea.

So, if any of the following sound like you, it’s probably time we organised a drink and a chat. 

  • You genuinely care about delivering results.
  • You’re hands on and not afraid to get stuck in.
  • You’re a passionate problem solver and dynamic.
  • You’re looking for a working environment where the whole team loves coming to work, supports each other and feels relaxed.
  • The idea of socialising with colleagues doesn’t fill you with dread.

The role

We are looking for an exceptional and experienced Client Manager to ensure the smooth and efficient running of our client accounts. Working closely with our Managing Director, you’ll take responsibility for the successful delivery of strategy, campaigns and overall client satisfaction across your accounts, acting as an advisor and advocate for our clients, and a lynchpin between our teams. Ultimately, your job will be to ensure addmustard is meeting our client objectives and, crucially, that we are delivering value to the businesses we work with. This role requires a great deal of empathy and proactivity, identifying and understanding our clients’ biggest challenges, and providing strategic direction and creative solutions that will help overcome them.

A background in digital marketing is essential, and experience integrating this with brand and ATL campaigns will be a real bonus. Ideally you’ll have hands-on experience at channel level and a deep understanding of the levers that can be pulled to deliver exceptional performance. It will be your responsibility to ensure our marketing activity is understood, planned, implemented and evaluated to a high standard, reporting the impact of our work to client teams, and advising on changes to the strategy and campaigns to improve performance or achieve new objectives.

You will need outstanding organisational and prioritisation skills, as you’ll be working across multiple clients and managing the activity of our brand, technology and marketing specialists, taking projects and tasks to completion, dealing with obstacles, and recommending improvements. You’ll also need to be an excellent communicator, written, verbal, and a great listener too, as you’ll be working and liaising with individuals across the entire business and client portfolio.

Key responsibilities

  • Build trusted and valued relationships with clients, acting as an advisor, consultant, advocate and primary point of contact.
  • Understand the marketing needs of our clients, analysing their business objectives and developing effective marketing objectives and KPIs that help achieve these.
  • Develop, own, implement and manage assigned clients’ marketing plans, covering brand, technology, paid media and organic channels.
  • Communicate our clients’ priorities and marketing plans to our team of specialists, including designers, analysts, developers and strategists, ensuring that they are thoroughly briefed and that all deliverables and campaigns are completed on time and on budget.
  • Provide regular, accurate and insightful reporting of performance and activity to client teams and senior management, highlighting successes and providing recommendations to continuously improve performance and profitability.
  • Lead weekly/monthly calls and meetings for assigned clients, setting agendas, confirming objectives, and recording and following up actions.
  • Identify opportunities to grow and develop existing client revenues.
  • Input into new business development and pitching.

Essential skills

  • 5+ years working in digital marketing or related roles
  • Hands on experience implementing integrated digital marketing campaigns
  • Proficient understanding of paid and organic marketing strategies and channels (PPC, Paid Social, SEO, Content, Social Media, Brand)
  • Excellent attention to detail
  • Proactive and creative problem solver
  • Excellent communicator


In return for your experience, creativity and incredible mind, we’ll make sure you work with and are trained by experts at the forefront of digital marketing. Our senior management is open, honest and transparent which means we regularly share financial, team, and client performance with the whole agency. You can choose the hours you work and where you work from, as long as it fits with our team and clients’ requirements, and you’ll enjoy a £1,000 annual training budget, free gym membership, ride-to-work scheme and many, many social events.  

We also offer unlimited holiday. Yes, it really is unlimited. And no, that wasn’t a typo.

Our full benefits include:

  • Unlimited holiday.
  • Flexi time: flexible working hours and work from home, unless you are required for an important meeting at addmustard’s central Brighton office.
  • Inclusion into our 10% annual bonus scheme (after one year with the company).
  • £500 personal training budget, allocated every 6 months.
  • Pension scheme, gym membership and ride to work scheme.
  • Be part of an amazing, sociable and supportive team with far too frequent nights out/socials/Friday pizza and beers and of course our annual Christmas parties abroad!

Department: Client Manager / Client Partner
Salary: £45,000 – £55,000 (+ bonus)