Group Director, Supply Side Excellence

About WPP Media

WPP is the trusted growth partner for the world’s leading brands. With exceptional talent, trusted data and intelligence, and world-class partnerships – all united by our pioneering agentic marketing platform, WPP Open – we help clients navigate change, capture opportunity, and deliver transformational growth. 

WPP Media is WPP's AI-driven media operating unit, bringing together media, data, and partnerships to deliver creative personalisation at scale. Connected through WPP Open and powered by Open Intelligence, clients see exactly where, how, and why their media investment is working.

For more information, visit wppmedia.com.

About WPP Media 

WPP is the creative transformation company. We use the power of creativity to build better futures for our people, planet, clients and communities. For more information, visit wpp.com.

WPP Media is WPP’s global media collective. In a world where media is everywhere and in everything, we bring the best platform, people, and partners together to create limitless opportunities for growth. For more information, visit wppmedia.com.

At WPP Media, we believe in the power of our culture and our people. It’s what elevates us to deliver exceptional experiences for both our clients and each other. In this role it will be critical to embrace WPP & WPP Media’s shared core values:

• Be Extraordinary by Leading Collectively to Inspire transformational Creativity.
• Create an Open environment by Balancing People and Client Experiences by Cultivating Trust.
• Lead Optimistically by Championing Growth and Development to Mobilize the Enterprise.

Group Director, Supply Side Excellence

Role Overview

The Group Director, Supply Side Excellence will lead the supply-side strategy across programmatic and out-of-home inventory, driving revenue growth, supply path optimization, and commercial performance. This role is highly technical and vendor-facing, with a strong emphasis on DSP/SSP expertise, partnership management, negotiation, and identifying new supply-side revenue opportunities.

The ideal candidate will be commercially sharp, technically strong, and experienced in managing supply-side relationships across a complex omnichannel environment.

Key Responsibilities

• Lead the Supply Side Excellence function across programmatic and out-of-home supply.
• Manage and develop a team of Directors and Senior Managers, providing leadership and performance direction.
• Oversee supply-side partnerships with DSPs, SSPs, and technology vendors.
• Identify and unlock supply-side revenue streams and commercial opportunities.
• Drive supply path optimization (SPO) initiatives to improve efficiency, margin, and supply quality.
• Negotiate with DSPs, SSPs, and other technology partners to secure commercial advantages, incentives, and incremental revenue.
• Work closely with the investment team to align supply strategy with vendor deals and commercial opportunities.
• Partner with programmatic and out-of-home teams to route inventory and enable best-use supply solutions.
• Support internal teams with DSP/SSP training, best-practice guidance, and use-case recommendations.
• Monitor supply performance and identify opportunities to scale inventory effectively across channels.
• Contribute to a broader omnichannel supply strategy, including CTV, display, and out-of-home.
• Maintain a strong focus on revenue targets, efficiency, and margin improvement.

What We’re Looking For

• Deep technical knowledge of DSPs and SSPs.
• Strong understanding of digital supply, inventory dynamics, and programmatic trading.
• Proven experience managing vendor relationships and commercial negotiations.
• Experience delivering supply-side revenue growth and efficiency improvements.
• Strong understanding of supply path optimization (SPO).
• Ability to work across multiple channels in an omnichannel environment.
• Commercially minded, proactive, and able to identify value in day-to-day work.
• Proven people leadership experience.
• Strong stakeholder management and communication skills.

Preferred Experience

• Experience working for a DSP, SSP, ad tech platform, or in a supply-side commercial role.
• Exposure to platforms such as PubMatic, Index Exchange, Amazon, Yahoo, or The Trade Desk would be highly relevant.
• Experience working across programmatic and out-of-home supply.

Life at WPP Media & Benefits 

Our passion for shaping the next era of media includes investing in our employees to help them do their best work, and we’re just as committed to employee growth as we are to responsible media investment. WPP Media employees can tap into the global WPP Media & WPP networks to pursue their passions, grow their networks, and learn at the cutting edge of marketing and advertising. We have a variety of employee resource groups and host frequent in-office events showcasing team wins, sharing thought leadership, and celebrating holidays and milestone events. Our benefits include competitive medical, group retirement plans, vision, and dental insurance, significant paid time off, preferential partner discounts, and employee mental health awareness days. 

WPP Media is an equal opportunity employer and considers applicants for all positions without discrimination or regard to particular characteristics. We are committed to fostering a culture of respect in which everyone feels they belong and has the same opportunities to progress in their careers.

We believe the best work happens when we're together, fostering creativity, collaboration, and connection. That's why we’ve adopted a hybrid approach, with teams in the office around four days a week. If you require accommodations or flexibility, please discuss this with the hiring team during the interview process.

WPP Media is committed to providing reasonable accommodation to, among others, individuals with disabilities and disabled veterans. If you need an accommodation because of a disability to search and apply for a career opportunity with WPP Media, please send an e-mail to WPP Media Leave Administration at Leave.Administration@groupm.com or call (212) 297-8507 and let us know the nature of your request and your contact information. 

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While we appreciate all applications received, only those candidates selected for an interview will be contacted. 

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