Global Media Effectiveness Lead - Hybrid/Remote, Data-Driven

COS; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Up to 30 days holiday

Annual health checks

Pension scheme

Discounts on activities and products

Cycle to work scheme

Discounted gym membership

Employee assistance

Private health & dental care

Job summary

COS is seeking a Global Media Effectiveness Manager to lead strategic measurement and optimisation of our global paid media. You will partner with Data & Analytics and agencies to evolve our measurement framework and translate insights into action across markets.

You’ll drive MMM adoption, manage reporting ecosystems, and support budget planning with a focus on data-driven decisions that boost brand equity and commercial outcomes.

Qualifications

• Extensive years of paid media measurement experience within a large premium brand or agency environment.
• Paid media channel expertise across all paid media channels (paid social, display, OOH, CTV, paid search, programmatic, affiliates).
• Advanced proficiency in paid media measurement including MMM, lift studies, attribution models and balancing with in-platform signals.
• Data-driven decision making to interpret brand health, media and performance data and translate insights into actions.
• Deep understanding of P&L impact and linking upper funnel metrics to bottom line growth.
• Hands-on measurement tools experience: MMM tools, GA4, PowerBI, and in-platform lift studies.
• Budget optimisation and media efficiency to maximise ROI under constrained budgets.
• Stakeholder management and influence to drive global adoption of measurement frameworks.
• Excellent presentation skills and ability to translate data into clear narratives for leadership.

Responsibilities

• Lead and evolve the global paid media measurement framework and related KPIs, reporting standards and experimentation.
• Establish a global learning and experimentation agenda with incrementality testing and Marketing Mix Modelling.
• Support high-impact experiments to inform better media investment decisions.
• Drive MMM adoption across markets and translate insights into market media planning.
• Manage the global paid media reporting ecosystem including scorecards, dashboards and executive reporting.
• Ensure consistency of reporting frameworks and KPIs across markets for benchmarking and decision-making.
• Translate complex data outputs into clear narratives for senior leadership and non-technical stakeholders.
• Provide regular reporting and strategic recommendations to global and regional stakeholders linking performance to business outcomes.

Skills

Paid media measurement

Stakeholder management

Data-driven decisions

Presentation skills

P&L impact

Tools

GA4

PowerBI

MMM tools

Job description

COS is seeking a Global Media Effectiveness Manager to lead strategic measurement and optimisation of our global paid media. You will partner with Data & Analytics and agencies to evolve our measurement framework and translate insights into action across markets.

You’ll drive MMM adoption, manage reporting ecosystems, and support budget planning with a focus on data-driven decisions that boost brand equity and commercial outcomes.