Senior Client Success Manager (Marketing Effectiveness)

Role description and requirements for a Client Success Manager who will work with multiple premier brands to provide first-class strategic client services, ensuring clients derive maximum value from products/services, building strong relationships, understanding client needs, and facilitating successful outcomes to drive satisfaction and retention.

Overview

The Client Success Manager will report to the Client Success Director and collaborate with the client leadership team to ensure optimal delivery and satisfaction. The ideal candidate should have a minimum of 5 years of experience in project management, client relationship management, and demonstrable expertise in data analytics, particularly within the realm of marketing effectiveness and Marketing Mix Modelling (MMM).

Responsibilities

• Drive optimal client project processes for work delivery and client satisfaction, specifically for projects involving advanced analytics and MMM.
• Deliver high-quality client materials in line with strategic objectives, clearly articulating analytical insights and MMM recommendations.
• Contribute to collaborative team learning and knowledge sharing to strengthen capabilities in marketing effectiveness measurement and MMM best practices.
• Lead discussions on MMM results and their implications, delivering in areas defined by client leadership.
• Support client growth initiatives and new business pitches, showcasing Gain Theory's analytical capabilities and MMM expertise.
• Collaborate with analytics, data, and ops teams to ensure a well-functioning squad with high client satisfaction, acting as a liaison between clients and delivery teams.
• Maintain a strong focus on the Marketing Effectiveness and analytics industry and stay updated on MMM techniques and industry benchmarks.

Qualifications & Critical Capabilities

• Strong data and analytical interpretation skills with proven experience in understanding and communicating Marketing Mix Modeling (MMM) outputs and their business implications.
• Proven ability to manage analytics-heavy client engagements and maintain effective client relationships.
• Knowledge of SOW oversight and risk management practices with an understanding of data and analytical project scopes.
• Commitment to quality assurance and best-practice adherence in delivering analytical models and insights.
• Effective communication and interpersonal skills to bridge the gap between technical analytics teams and business stakeholders.
• Strategic support for financial analysis of client budgeting and profitability insights, leveraging analytical findings to inform investment decisions.

Key Activities & Accountabilities

• Drive optimal client project processes for work delivery and client satisfaction.
• Deliver high-quality client materials aligned with strategic objectives.
• Foster collaborative team learning and knowledge sharing to strengthen capabilities.
• Engage in client leadership-defined areas of client engagement and management.
• Support client growth initiatives and new business pitches.
• Collaborate with analytics, data, and ops teams to ensure a well-functioning squad with high levels of satisfaction.
• Maintain a strong focus on the Marketing Effectiveness and analytics industry and client needs.

Who We Are & What We Do

Gain Theory is a leading global marketing effectiveness and foresight consultancy that combines quality data, proprietary technology, and advanced analytics to help clients make better-informed investment decisions that drive growth.

We deliver data strategy, harmonization, visualization; advanced analytics and modelling (including MMM, attribution, unified measurement, testing, segmentation, behavioural sciences, simulation, war gaming, forecasting); and high-touch consultancy with bespoke roadmaps, training, education, benchmarking and activation planning.

As a WPP-owned consultancy, Gain Theory has access to a range of data, expertise, and tools to differentiate our offering. We emphasize a diverse, equitable, and inclusive workplace and our values: Be Curious, Be Positive, Act with Consideration, Make it Better.

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Employment Details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Other
• Industry: Advertising Services

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