Client Development Manager (RMN) in London

Company Description

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Overview

How You’ll Make an Impact

We're looking for a Client Development to join our Retail Media team at Epsilon UK. This is an entry-level role designed for someone eager to build a career in retail media, digital marketing, data analytics, and client development.

In this quota-carrying role, you will become an expert user of Epsilon's reporting, measurement, and insights tools, independently analysing retail media campaign performance across onsite and offsite channels. Your primary focus will be transforming campaign data into compelling narratives that demonstrate commercial value for retailers and brands, helping Senior Sales Managers identify opportunities for growth, renewal, and incremental investment.

Working closely with Senior Sales Managers and commercial leaders, you will uncover performance trends, develop evidence-based recommendations, and support strategic account development through best-in-class analysis and storytelling. You will play a key role in helping clients understand the impact of their retail media investments while contributing to revenue growth through data-led sales opportunities.

Success in this role comes from combining analytical rigour with commercial curiosity. The ideal candidate enjoys working with data, uncovering the story behind campaign performance, and helping sales teams turn insights into growth opportunities. Over time, this role can evolve from campaign analysis and sales support into broader client management and account leadership responsibilities.

This is a fantastic opportunity to learn digital marketing from the ground up while developing expertise in retail media measurement, campaign analytics, sales strategy, and client-facing communication. The role provides a strong foundation for future progression into broader client management, account leadership, and commercial roles within one of the fastest-growing areas of digital advertising.

Responsibilities

• Performance Analysis & Insights
• Independently analyse onsite and offsite retail media campaign performance using Epsilon reporting and measurement platforms
• Translate campaign results into clear, compelling narratives tailored to retailers, suppliers, and brand stakeholders
• Identify key performance drivers, trends, optimisation opportunities, and actionable recommendations
• Deliver post-campaign evaluations that demonstrate commercial impact and support future investment decisions
• Develop expertise in retail media measurement, digital marketing fundamentals, and performance analytics
• Commercial Support & Growth
• Partner with Senior Sales Managers to identify upsell, cross-sell, renewal, and growth opportunities using campaign performance data
• Proactively surface insights that support account growth conversations and strategic planning
• Contribute to quarterly business reviews, sales presentations, and client-facing recommendations
• Support the creation of data-driven materials that strengthen retailer and supplier relationships
• Account Management & Client Support
• Support the day-to-day management of retailer accounts, ensuring consistent delivery and responsiveness
• Build effective working relationships with client and internal stakeholders (including Agency partners) through clear, timely communication
• Act as a dependable point of contact for campaign-related and operational queries
• Coordinate with internal teams and stakeholders to ensure technical workflows are managed efficiently and campaigns are activated accurately and on time
• Operational Excellence
• Maintain accurate reporting, performance tracking, and documentation across systems (e.g. Salesforce, campaign/pipeline trackers)
• Ensure data quality and consistency across reporting outputs
• Demonstrate strong organisation and attention to detail across multiple campaigns and accounts
• Contribute to process improvements that enhance reporting quality and efficiency

Key Performance Indicators

• Quality, accuracy, and consistency of campaign reporting and insights
• Timeliness of post-campaign analysis delivery
• Quality of sales narratives and client-facing recommendations
• Contribution to account growth opportunities identified through analysis
• Adoption and effective use of reporting and measurement tools
• Senior Sales Manager and stakeholder feedback
• Data accuracy and operational compliance
• Contribution to renewal, upsell, and cross-sell discussions supported by insights
• Client responsiveness and SLA adherence

Qualifications

What you’ll bring with you:

• Ideally 1+ years’ experience in marketing, media, business, or a related field
• Strong interest in retail media, digital marketing, technology, and data-driven advertising
• A proactive, learning-focused mindset with the ability to adapt quickly
• Strong organisational skills with the ability to manage multiple priorities in complex, fast moving environments
• High attention to detail and ownership of deliverables
• Confidence working with data and tools such as Salesforce, Microsoft office tools: Excel and PowerPoint
• Clear and professional communication skills, both written and verbal
• Collaborative approach, with the ability to work effectively across teams

Why you might stand out from other talent:

• You bring a positive, “can-do” attitude and consistently show initiative, even when faced with new challenges
• You are a clear and effective communicator, able to keep stakeholders aligned and informed without being prompted
• You are naturally curious—asking questions, seeking feedback, and actively looking for ways to improve
• You demonstrate ownership and accountability, delivering work to a high standard
• You are highly organised and dependable, someone your team can rely on to keep things moving
• You demonstrate strong interpersonal awareness, building trust and rapport quickly with both clients and colleagues

Additional Information

When you join Epsilon, we’ll create something EPIC together. We’re a global leader in data and identity, with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services. Positioned at the center of Publicis Groupe, Epsilon helps brands deliver personalized experiences at scale and build lasting customer relationships by unlocking the full potential of data and identity. Epsilon operates in 30+ countries across EMEA, the Americas and APAC, with more than 8,000 employees.

Check out a few of these resources to learn more about what makes Epsilon so EPIC:

Our Culture: Life at Epsilon: Epsilon has five values that define our culture and guide us as we create value for our clients, our people and consumers. We seek candidates who align with our company values, demonstrate them and make them meaningful in their day-to-day work:

• Act with integrity. We are transparent and have the courage to do the right thing.
• Work together to win together. We believe collaboration is the catalyst that unlocks our full potential.
• Innovate with purpose. We shape the market with big ideas that drive big outcomes.
• Respect all voices. We embrace differences and foster a culture of connection and belonging.
• Empower with accountability. We trust each other to own and deliver on common goals.

Because You Matter

We know that we have some of the brightest and most talented employees in the world, and we believe in rewarding them accordingly. If you work here, expect competitive compensation, a great benefits package and endless opportunities to advance your career.

We offer hybrid working opportunities, with our office space located in the Iconic Television Centre, White City.

As part of our dedication to enhance our inclusive and diverse workforce, Epsilon is committed to equal access to opportunity for people without regard to race, age, sex, disability, neurodiversity, sexual orientation, gender identity, pregnancy and parental, marriage and civil partnership or religion or belief. We are committed to providing reasonable adjustments for candidates in our application process.