Senior Client Partner

Client Leadership Team Overview The Client Leadership Team at Open Partners is the heartbeat of our agency: driving strategic vision, integration and performance through close, high-impact relationships. We blend Media, Creative and Data into cohesive, growth-oriented roadmaps and set the tone for Smarter, Faster, Better across everything we do. This is a privileged team of top-tier talent with drive and ambition who partner with clients to drive true business value and define and demonstrate what Agency of Next means.

Role Purpose To act as a consultancy-level leader responsible for running your portfolio like your own business, demonstrating total ownership of commercial performance, client satisfaction, strategic direction, and team capability. You will own senior client relationships, shape long-term strategy across media, data, and creative, and directly influence the commercial growth and long-term health of Open Partners.

Beyond your portfolio, you will act as an agency-wide leader shaping our operating model, partnering with the Client Delivery organisation, and driving future-defining initiatives (including AI, automation, and agent-based systems) to define what Agency of Next means.

• C-Suite Influence: Established trusted, C-suite level relationships across your portfolio and identified key internal champions who actively advocate for OP.
• Integrated Strategy: Delivered integrated Effectiveness Roadmaps and RISE strategies that clearly articulate a single, commercially grounded business narrative across Media, Data, and Creative.
• Commercial Mastery: Established 100% control over your portfolio's commercial health, achieving high forecasting accuracy ($ge $95%) and identifying clear organic growth opportunities.
• Team Elevation: Guided your client pod to operate cohesively alongside the Client Delivery Centre of Excellence, with clear objectives and rising capability scores across the team.
• Agency-Wide Innovation: Actively leading or contributing to at least one agency-wide initiative shaping our AI, automation, or operating model vision.

• Run your client portfolio as an independent, high-performing business unit, unlocking organic growth and driving long-term value creation.
• Lead the development and deployment of Effectiveness Roadmaps, RISE strategies, Key Account Plans (KAPs), and Business Reviews to steer C-suite decision-making.
• Set and execute a single, commercially grounded business narrative that seamlessly integrates Media, Creative, and Data into business outcomes.
• Proactively frame complex marketing and commercial challenges into structured, insight-rich hypotheses, experimentation frameworks, and actionable roadmaps.
• Partner closely with the Client Delivery Centre of Excellence to ensure output quality, alignment, and operational excellence across portfolios.

• Own 100% of budgeted revenue delivery, margin protection, and overall commercial health across your portfolio with zero unapproved leakage.
• Drive 20%+ organic growth per year by identifying and converting upsell, cross-sell, and expansion opportunities based on strategic needs.
• Maintain $ge $95% forecasting accuracy and oversee scope management, contract negotiations, and formal business cases for client investment.
• Connect OP’s work directly to client commercial KPIs, financial outcomes, and multi-year value creation.

• Build and maintain deep, authoritative relationships at Board and C-suite levels, serving as a trusted partner and senior advisor.
• Cultivate and document client Champions who advocate for OP’s strategic…