Media Effectiveness Manager - Sweaty Betty in London

At Sweaty Betty, we are more than just a global activewear and lifestyle brand for women. We are also a community that believes fitness is a flip-the-switch trigger for becoming the woman you want to be. Leggings and sports bras won’t change the world on their own. But with a grab-my-hand, let’s-go-for-it-now spirit, the women who wear them can.

This is an exciting opportunity to join us as a Media Effectiveness Manager.

• WE REALLY CARE
• FIRST, BEST, BRAVEST
• OUR STRENGTH IS IN EACH OTHER
• STAND UP, SPEAK UP, SHOUT OUT

About the Role

We are looking for a highly analytical and collaborative Media Effectiveness Manager to join our Paid Media team. This role sits at the centre of our performance ecosystem, bringing together all paid channels into a unified view, shaping how we invest our media budgets, and ensuring we are driving sustainable, data-led growth.

You will partner closely with channel specialists, analytics, our attribution partner, and CRO to optimise spend, shape our measurement roadmap, and rigorously evaluate incrementality across channels. This is an exciting opportunity for someone who thrives at the intersection of data, strategy, experimentation, and cross-functional collaboration.

• Identify, launch, and scale experimental campaigns across both BAU and emerging digital platforms.
• Rapidly iterate on creative, messaging, and audience strategies to continually improve performance.
• Explore high-impact offline media opportunities to diversify the acquisition mix and drive incremental reach.
• Establish KPIs for new channels and ensure reporting clarity across stakeholders.

Key Responsibilities

Unified Growth & Channel Overview

• Develop and maintain a holistic, cross-channel view of paid media performance.
• Consolidate insights from individual channel managers into a cohesive narrative that informs strategy and investment decisions.
• Identify opportunities across channels to drive incremental revenue and improve efficiency.
• Identify, test, and scale growth levers across paid, owned, and emerging platforms.
• Conduct audience research, competitor analysis, and market testing to uncover new opportunities.
• Collaborate with product, brand, and e-commerce teams to align marketing activity with business objectives.

Budget Allocation & Attribution

• Act as the internal owner of cross-channel budget allocation.
• Partner with our attribution provider to ensure budget decisions align with incrementality and cross-channel value.
• Continuously evaluate budget distribution to maximise ROI, ensuring spend reflects performance insights from attribution, analytics, and in-platform data.

Measurement Strategy & Incrementality Testing

• Lead the development of the paid media measurement roadmap.
• Design and coordinate incrementality experiments across channels (e.g., geo-tests, audience splits, holdouts).
• Partner with analytics to validate results and integrate learnings into ongoing optimisation.
• Own the documentation, governance, and communication of measurement frameworks.

Cross-Functional Collaboration

• Work closely with the CRO Manager to ensure landing page performance, conversion strategies, and testing plans align with paid media efforts.
• Partner with our analytics team to ensure data accuracy, reporting evolution, and alignment on measurement best practices.
• Influence cross-functional stakeholders through clear storytelling and strong analytical rationale.

Skills & Experience Required

• Proven experience in growth marketing, paid media, marketing analytics, or performance measurement.
• Strong understanding of attribution (MMM, MTA, incrementality) and how to balance it with in-platform signals.
• Hands-on experience designing, analysing, or coordinating marketing experiments.
• Excellent quantitative skills with the ability to translate complex data into actionable insights.
• High level of comfort with scenario modelling, and investment decisioning.
• Strong cross-functional communication and stakeholder management skills.

Nice to Have

• Experience working with analytics platforms (GA4, Looker, etc.).
• Familiarity with CRO experimentation frameworks.
• Retail or ecommerce experience.

Who You Are

• Curious, data-driven, and focused on understanding what truly drives growth.
• A natural collaborator with strong influencing skills.
• Proactive, organised, and able to balance both strategic work and hands-on execution.

Our DEI Commitment

We are working to create a culture and team that represents our mission of empowerment. We want to celebrate our diversity, embody inclusion and create an equitable business. This means doing more and working harder to make the long-lasting changes necessary. We care about our people, our community and world.

We want to stand up for what we believe in and give our people a platform to use their voice. To actively listen and learn from what they have to say. This involves focusing on learning, development, and progression across the business. Being clear on the responsibilities we hold each other and to our community. It also means being committed to equal employment opportunities. Ensuring we consider ALL applicants for jobs and working harder to make our job advertising more inclusive.

Our DEI mission is to embed diversity, equity and inclusion at the heart of our business. To create a culture of belonging that empowers everyone to be their best authentic self. We commit to celebrating different perspectives and to continuously learning, developing and challenging ourselves and our partners.

We know we’re on a journey. And far from perfect. But we want to be a part of the solution to the problem. It might not be comfortable or straightforward. But if we weren’t up for doing the hard work and breaking the mould, we wouldn’t be Sweaty Betty. We are committed to working across our business and with our DEI committee & DEI Collective to be champions, allies and inclusive, always. Because when we say all, we mean it.