Global Head of Effectiveness

Agency : Havas Media Group Job Description : We are seeking a Global Head of Media Effectiveness to lead the approach and application of media effectiveness at Havas Media Network, defining the frameworks and ways of working that prove and improve the value of media for clients. This role sits at the intersection of strategy, data, analytics, and planning. This role will lead the development of robust measurement frameworks, test-and-learn programmes, and overall effectiveness positioning at HMN that clearly articulates the value of media and marketing investment across our diverse client portfolio. Critically this work will also serve as the platform to improve cross-selling of our CSA advanced analytics capabilities to clients. Key Responsibilities 1) Effectiveness Leadership Define, own and evolve HMN’s effectiveness philosophy, frameworks, and methodologies for measuring marketing, campaign and channel effectiveness in collaboration with CSA. Champion a culture of continuous improvement, experiment-based learning, and evidence-led planning across all global client teams. Represent the agency’s effectiveness POV internally and externally (e.g., pitches, industry councils, awards case studies and jury representation). Develop training programmes to elevate data literacy and effectiveness thinking across the wider agency network alongside the Global CSA team. 2) Client & Commercial Impact Work closely with client leadership, strategists and planners to set measurable objectives and define KPIs aligned to client specific business outcomes, not just media outputs. Develop compelling narratives and Board level effectiveness stories that clearly connect media investment to real business impact for our global clients. Work collaboratively with CSA to drive revenue on clients via new scopes of work including MMM, MTA, brand lift, attribution, incrementality testing, and bespoke analytics. Be the Measurement and Effectiveness lead on global pitches, involved in the process from RFI, through local market quality control to client pitch presentations. 3) Data, Tools & Methodologies Define the business needs for the measurement and effectiveness product roadmap alongside the Head of CSA and in collaboration with the Converged.AI Product team. Ensure planning teams are using best-practice measurement approaches and pre-/post-campaign evaluation frameworks for global clients. Guide the integration of 1P data, digital signals, and offline performance data into holistic evaluation models that support clients’ own long term data strategies. Experience & Skills Required Proven experience in a senior effectiveness, measurement, data strategy or econometrics leadership role within a media agency, marketing consultancy, or client-side marketing analytics function. Strong understanding of brand-building, demand creation, and performance marketing measurement. Hands-on familiarity with effectiveness approaches such as: Econometrics / MMM Marketing attribution Incrementality testing / test & control Brand tracking / behavioural research Business KPI modelling Ability to translate complex analysis into clear and persuasive commercial narratives for senior stakeholders. Confident presenting to C-suite level clients and influencing strategic decisions. Experience managing and developing teams of specialists. Comfortable collaborating with planning, strategy, digital, and data science teams. #LI-CO1 Contract Type : Permanent Here at Havas across the group we pride ourselves on being committed to offering equal opportunities to all potential employees and have zero tolerance for discrimination. We are an equal opportunity employer and welcome applicants irrespective of age, sex, race, ethnicity, disability and other factors that have no bearing on an individual’s ability to perform their job. If you don't find a suitable opening on our Career Site, don't worry! You can still send your resume to us. Please go to Consider me for Future Openings. About Us Founded in 1835 by Charles-Louis Havas, Havas is one of the world’s largest global communications groups, with more than 23,000 people in over 100 countries sharing one single mission: to make a meaningful difference to brands, businesses, and people. Havas has developed a fully integrated model covering all communications activities. The teams of the three business units, Creative, Media and Health & You, work together with agility and in perfect synergy to offer clients tailor-made, meaningful, innovative and entertainment-oriented solutions that support them in their positive transformation. Life at Havas We take great pride in our Havas family. They bring many unique personalities, perspectives and passions to their work. Collaboration is at the core of how we operate, and Havas Villages are the homes we work in. We encourage our people to take advantage of our many opportunities to learn and grow. Through local agency training sessions, our unique global and development programs, we offer our people endless opportunities to explore. Havas Media Network We create the best media experience, capitalizing on the most meaningful media to build more meaningful brands. We know how to connect a client with their target audience – in the context of where they are, through the content they pay attention to. We deliver this expertise through the Mx System, our global operating methodology and strategic planning process, that creates value for our clients by turning consumer intelligence into clear growth targets, aligning stakeholders and KPIs, and measuring the impact of media experiences. Havas Creative Network At Havas, we believe creativity isn’t just a description of our business, it is part of our agencies’ DNA. We bring together some of the industry’s most creative and accomplished agencies. By combining creative expertise with the strategic and innovative power of our Villages, we can build seamless teams around the individual needs of each of our clients. Havas Health Driven by human purpose and focused on the betterment of humanity through health, Havas Health & You leverages a global collection of experts and individuals to help people everywhere live healthier lives. With a spirit rooted in innovation, creativity, and education, we are dedicated to delivering consistent excellence and groundbreaking work.