Senior Manager, Client Delivery

Who we are & what we do:

Gain Theory is a leading global marketing effectiveness and foresight consultancy. We combine quality data, proprietary technology, and advanced analytics to give our clients the confidence to make better informed investment decisions that drive growth.

Growth is the defining characteristic of successful organizations, and Gain Theory’s vision is to accelerate growth for ambitious brands. We define ambitious brands as those that generate earnings/profits above the industry average. We deliver:

• Data strategy, harmonization, and visualization.
• Advanced analytics and modeling, including MMM啦 attribution and unified measurement, testing, segmentation, behavioral sciences, choice analytics, simulation, war gaming, and forecasting.
• High‑touch consultancy that includes bespoke roadotive roadmaps, training, education, industry benchmarking, and activation planning.

At Gain Theory, we love accelerating growth for ambitious brands and people. You must demonstrate behaviors that support our values.

Our values are:
Be Curious, Be Positive, Act with Consideration, and Make it Better. Read more about our values at

We are looking for a Senior Client Success Manager with deep expertise in Marketing Mix Modeling (MMM) and econometrics to lead strategic client engagements and maximize business impact from our analytics solutions. This senior role requires a unique blend of relationship management, commercial acumen, and technical fluency in econometric modeling to guide clients’ marketing investment strategies and demonstrate value.

The Senior Manager reports to the Client Success Senior Director and works closely with the client leadership team to ensure optimal delivery and satisfaction. The ideal candidate has at least five years of experience in project management, client relationship management, and data analytics. The careful candidate can workეჰ in a fast‑paced environment, manage multiple projects simultaneously, and prioritize tasks effectively. They should have excellent problem‑solving skills, attention to detail, and a proactive approach to identifying and resolving issues.

The candidate also must have a deep understanding of the Marketing Effectiveness and analytics industry, with up‑to‑date knowledge of the latest trends and developments. They should interpret