As Client Success Senior Director , you will play a pivotal role in delivering client excellence and driving marketing effectiveness. You will lead client partnerships across key accounts, acting as a strategic advisor who champions analytics-driven marketing performance. This role requires a strong blend of leadership, commercial acumen, and deep marketing measurement expertise. You will work closely with senior client stakeholders, helping them unlock growth through data-led decisions, advanced analytics, and actionable insights.

Key Responsibilities

Client Leadership & Strategic Impact Serve as the senior point of contact for client executives, shaping and delivering marketing effectiveness strategies that align with their business goals. Champion the use of advanced analytics (MMM, attribution, testing) to influence high-value marketing decisions and demonstrate ROI. Translate complex insights into clear, actionable narratives that drive client confidence and stakeholder buy-in. Expand client relationships by identifying new opportunities and embedding Gain Theory’s marketing effectiveness frameworks into their strategic planning.

Marketing Effectiveness Delivery Ensure flawless execution of analytics projects, with emph...