Client Growth Managing Partner (Groupe) in London

We're looking for a Client Growth Managing Partner to join our London team. Your mission will be to create win/win outcomes by introducing complex products, highly differentiated solutions into Epsilon and Publicis Groupe's existing portfolio of clients. This is a senior commercial and strategic leader responsible for scaling adoption, revenue, and client value from the Groupe's privacy‐first data collaboration platform.

This role sits at the intersection of client leadership, data strategy, and advanced Connected Media Technology, with accountability for embedding Epsilon at the core of client media and marketing transformation strategies within Groupe. Managing Partners are responsible for overall business performance, client relationships, and strategic direction, ensuring growth, innovation, and operational excellence across Groupe.

You'll report to the Senior Vice President of Client Services & Growth and work closely with Commercial, Marketing, Product and Solutions teams, along with key internal stakeholders and external customers. This is a hybrid role based in London (x4 days per week in office).

Responsibilities

• Own and drive portfolio‐level revenue growth for Epsilon, identifying, shaping, and closing high‐value opportunities across Groupe clients while navigating complex internal and external stakeholder ecosystems.
• Act as the executive sponsor for key client relationships, building trusted C‐suite partnerships and influencing long‐term client strategy and transformation agendas.
• Define and lead the commercial strategy across your portfolio, creating scalable, repeatable growth frameworks that unlock new revenue streams and market opportunities.
• Orchestrate cross‐Groupe collaboration, aligning capabilities across media, data, identity, and technology into a single, compelling client proposition.
• Elevate solution design and positioning, ensuring Epsilon's differentiated capabilities are embedded at the centre of client marketing, data, and media ecosystems.
• Champion operational excellence at scale, ensuring consistent, high‐quality delivery across multiple clients and teams.
• Build, lead, and inspire a high‐performing team, setting standards for commercial discipline, client leadership, and growth culture across the organisation.

Qualifications

• Extensive experience in client leadership, sales, and marketing transformation, with a track record of owning and growing complex, high‐value portfolios.
• Executive‐level commercial acumen, with clear accountability for revenue, profitability, and long‐term business growth.
• Deep expertise across data‐driven marketing, media, and/or AdTech ecosystems, with the ability to connect strategy, analytics, and activation into tangible business outcomes.
• Proven ability to operate at C‐suite level, influencing senior stakeholders and navigating complex, multi‐layered organisations.
• Strategic thinker with a strong consultative approach, able to translate client objectives into scalable, high‐impact solutions.
• Outstanding leadership capability, with experience leading senior teams and developing future leaders in a high‐performance environment.
• Exceptional stakeholder management and negotiation skills, able to align diverse internal and external partners to a common outcome.
• Highly commercial and growth‐oriented mindset, with a proactive approach to identifying new opportunities, market gaps, and innovation‐led growth.

Why you might stand out from other talent:

• Knowledge of AdTech, MarTech platforms and data flows as well as Agency business models/structures.
• You are a strategic, enterprise‐level leader, comfortable owning both client growth and business performance.
• You combine deep expertise with commercial instinct, enabling you to simplify complexity and drive decisive action.
• You lead with energy, accountability, and clarity, creating momentum and elevating performance across teams and clients.

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.