Client Success Partner (12-month FTC)

About this role

About WPP

WPP is the trusted growth partner for the world’s leading brands. We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth. For more information, visit WPP.com.

The opportunity:

A commercially astute and consultatively minded Client Success Partner to join our client leadership team. This is a senior advisory role at the heart of how we create value for our clients — translating complex analytical work into strategic guidance that directly shapes our clients' investment decisions and growth trajectories.

You are a trusted advisor first and foremost — someone who builds genuine partnerships with senior client stakeholders, earns a seat at the table through deep expertise, and brings the intellectual curiosity and commercial instinct to identify where Gain Theory can make a meaningful difference.

You will bring 12+ years of experience in marketing effectiveness, analytics, or a related consulting discipline.

What you’ll be doing:

• Acting as a Strategic Advisor to Senior Clients: You'll be the primary consultative voice for your clients — proactively shaping how they think about marketing investment, effectiveness measurement, and growth. You won't wait to be asked; you'll bring forward-looking perspectives, challenge assumptions constructively, and connect analytical findings to real business outcomes. Your clients will value you as a partner who understands their world as much as you understand ours.

• Translating Complexity into Strategic Clarity: You'll take sophisticated analytical outputs (MMM, attribution-like techniques), scenario planning) and craft compelling narratives that resonate with senior decision-makers. Your ability to distil complexity into clear strategic recommendations will be central to the value clients associate with Gain Theory.