Senior Manager, Data Science & Marketing Effectiveness (MMM), London, UK

Ekimetrics transforms how organizations make critical business decisions. Since 2006, we’ve been helping companies build sustained competitive advantage through AI-powered Managed Solutions. Our dual purpose is Competitiveness and Sustainability, because lasting leadership is built on both.

Our solutions are a unique combination of people and technology. We combine our Eki.Decisions platform with embedded experts in marketing, commercial effectiveness, and data science, connecting decisions across business domains to drive real, positive, scalable, and lasting impact.

With a full in-house team and offices in Paris, London, New York, Hong Kong, and Shanghai, we commit to responsibility and frugality in AI, systematically building competitive advantage, and being loyal to our values and DNA.

Your responsibilities

As a Senior Manager in Marketing effectiveness, you will lead multiple high-impact programs for strategic clients, manage multi-account portfolios, and drive both business growth and talent development. You will oversee teams, ensure delivery excellence, and strengthen Ekimetrics’ market position.

More precisely, you will:

Strategic Portfolio & Project Leadership

• Lead a portfolio of strategic client projects (multi-accounts) or a major regional project under Partner supervision.
• Define, steer, and monitor strategic project roadmaps leveraging Ekimetrics solutions models and standards.
• Ensure robust governance: data quality, model accuracy, actionable insights, and on-time, high-value delivery.
• Pilot portfolio growth, margin, costs, and ROI to meet business objectives.
• Secure alignment of resources for high-quality delivery in line with Ekimetrics’ strategy.
• Translate complex analytics into compelling narratives and actionable recommendations for senior stakeholders and C-suite clients.
• Support clients in optimizing marketing spend, improving segmentation, enhancing campaign performance, and maximizing ROI.
• Lead contributions to RFPs and pitches, reinforcing Ekimetrics’ commercial visibility.

People & HR Leadership

• Line manage multiple team members, overseeing performance, conducting regular 1:1s, performance reviews, and talent assessments, while ensuring high-quality delivery, profitability, and client satisfaction.
• Lead HR and talent development initiatives, including annual talent reviews, career development planning, succession planning, and retention strategies, achieving retention of direct reports.
• Mentor and coach managers, analysts, and junior staff, promoting knowledge sharing and developing team capabilities.
• Recruit, align, and develop resources to build high-performing teams, retaining top talent.
• Encourage collaboration, communication, and high engagement across squads.

Account & Business Growth

• Serve as the operational and strategic point of contact for key accounts, maintaining strong long-term client relationships.
• Identify cross-sell and upsell opportunities and support global account growth strategies.
• Contribute to the scoping and design of new projects, ensuring business cases align with Ekimetrics capabilities.
• Represent Ekimetrics externally at conferences, events, and client forums.
• Track and animate realized client business gains from Ekimetrics partnership, drive a narrative of program value to account stakeholders.

Practice & Thought Leadership

• Share and document best practices across the community to promote mastery of delivery.

• Contribute to building/developing verticals, domains, or leading strategic projects locally or globally.
• Contribute to upskilling strategies for office teams in client management, PMO, and project leadership.
• Act as an ambassador of Eki culture role-modelling Ekimetrics’ core values: Curiosity, Creativity, Excellence, Generosity, Enjoyment.

Your profile

Experience & Technical Skills

• 9+ years’ experience in econometrics, MMM, marketing effectiveness, or data science analytics.
• Bachelor’s or master’s degree in Statistics, Econometrics, Data Science, Economics, Applied Mathematics, Marketing Analytics, or a related field.
• Knowledge in Python, SQL, Excel, and visualisation tools; experience with Databricks, Azure, or other cloud/data platforms is a plus.
• Deep understanding of econometrics, regression, Bayesian statistics, and advanced modelling techniques.
• Proven ability to handle large datasets, optimise pipelines, and deliver high-quality outputs.
• Track record of translating complex model outputs into strategic, business-focused recommendations.
• Fluent English is mandatory.

Client & People Management

• Experienced in line management, HR responsibilities, Performance reviews and career development.
• Proven ability to lead multiple project teams and manage priorities autonomously.
• Excellent communication, storytelling, and presentation skills for senior stakeholders and C-suite clients.
• Strategic thinker with strong problem-solving mindset and focus on continuous improvement.
• Experienced in mentoring, coaching, talent development, and fostering team growth.
• Skilled in client account management, maintaining relationships, and driving portfolio growth.
• Contributes to thought leadership and forward-looking perspectives on marketing measurement and MMM.

Soft Skills

• Collaborative, proactive, and results-driven.
• Positive, resilient, and adaptable in fast-paced environments.
• Curious, creative, and committed to delivering high-quality work

Why join us?

At Ekimetrics, we believe your ideas truly matter. Here, your ideas are yours to build and bring to life. We embrace an entrepreneurial spirit, encouraging you to push boundaries to achieve meaningful impact. But it’s not just about individual success: we thrive on collaboration and enriching one another.

Together, we’re constantly learning and growing, whether through personalized career paths and training, challenging projects, mentorship, or simply through the diverse perspectives we bring to the table.

And perhaps more importantly, we believe in enjoying what we do. Ekimetrics is a stimulating and safe environment where you can thrive as your authentic self.

In 2023, Ekimetrics obtained the “mission-driven company” status, reflecting our strong commitment to CSR.

Our purpose: Accelerate organisations’ transformation towards sustainability through the application of data science and artificial intelligence.

Ekimetrics is part of the French Tech 120 ranking. We have been selected by La French Tech to join the prestigious group of the top 120 French scale-ups, recognised for their potential to become international leaders.

You will have access to:

• A compensation package from £98,000 + 20% bonus + Corporate bonus
• 4% matched pension
• 25 days Holiday + Bank holidays + extra day Tenure leave
• Private medical care
• Life insurance
• Critical illness cover
• Salary sacrifice bike scheme
• The Eki.Academy training catalog and certifications
• Events and seminars to stay close to your community
• Light vibrant premises in a central area in the heart of London
• + many other Ekimetrics benefits

As an employer, Ekimetrics offers equal employment opportunities to all, regardless of gender, ethnicity, religion, sexual orientation, social status, disability, or age. Ekimetrics strives to develop an inclusive work environment that reflects diversity within its teams.