Assistant, Media Planner Buyer

About WPP Media

WPP is a growth partner to many of the world’s leading brands, combining talent, data, intelligence, and partnerships through its WPP Open platform to help clients adapt to change and achieve meaningful growth. WPP Media is WPP’s media organization, built around AI-enabled media, data, and partnerships to deliver personalized creative work at scale. With support from WPP Open and Open Intelligence, clients can better understand how their media investment performs.

WPP is also described as a creative transformation company focused on using creativity to build stronger outcomes for its people, planet, clients, and communities. WPP Media operates as WPP’s global media collective and is part of GroupM, WPP’s global media investment management business.

Role Overview

The Assistant, Media Planner/Buyer supports media planning and buying teams with day-to-day coordination, documentation, reporting, and platform inputs. This hybrid role is based in Toronto, Ontario, Canada, and involves working closely with internal teams and external vendors to keep planning, buying, and billing workflows moving accurately and on time.

Key Accountabilities

• Help media planners and buyers build plans, points of view, reports, and presentation materials.
• Keep templates current and apply changes requested by the planning and buying team.
• Support the media planning process from start to finish.
• Prepare and manage materials such as rankers, insertion orders, buy sheets, trafficking details, specification documents, and deadline charts.
• Enter purchased media into the agency stewardship system, including MediaOcean/Prisma.
• Pull reports and data for the planning and buying team to examine and interpret.
• Use research tools and vendor platforms to gather data accurately.
• Watch for patterns, irregularities, trends, and anomalies in data.
• Handle billing workflows and work quickly to resolve discrepancies.
• Escalate vendor invoice issues to planners and buyers so they can be negotiated and resolved.
• Coordinate meetings with internal stakeholders and external vendors when needed.
• Maintain contact and representative lists and support vendor outreach efforts.

Culture and Working Style

WPP Media emphasizes collaboration, openness, and optimistic growth. The role is expected to align with core values centered on collective leadership, trust, and development. The company follows a hybrid work model, with teams generally in the office about four days per week.

Benefits and Workplace Experience

Employees have access to WPP Media and WPP networks for learning, relationship-building, and professional development. The organization also supports employee resource groups, in-office team events, and recognition of wins, holidays, and milestones. Benefits mentioned include medical coverage, group retirement plans, vision insurance, dental insurance, generous paid time off, partner discounts, and mental health awareness days.

Additional Information

WPP Media is an equal opportunity employer and reviews candidates without discrimination. If accommodations or flexibility are needed, candidates are encouraged to discuss this during the interview process. Only applicants selected for an interview will be contacted. The privacy notice referenced in the source explains how candidate information is processed.