Summary
Overview
Work History
Education
Skills
Websites
Timeline
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MACKENZIE CLAPPERTON

Kitchener,ON

Summary

Dynamic and results-driven leader with extensive experience managing Canada’s Demand Solutions team at the world’s largest independent sell-side advertising company. Proven success in delivering impactful programmatic and managed service campaigns across key digital channels for top Canadian agencies and brands. Expertise in campaign optimization and leveraging data-driven insights to drive performance, align strategies with client objectives, and maximize ROI. Strong relationship builder with a focus on mentoring high-performing teams and delivering exceptional outcomes.

Overview

7
7
years of professional experience

Work History

Senior Account Director, Demand Solutions

Magnite
01.2025 - Current
  • Lead and oversee the delivery and performance of all Canadian managed service and programmatic budgets exceeding $15M annually across CTV, OLV, Display, Native, and Audio ad formats.
  • Conduct in-depth data analysis and lead reporting efforts using Tableau, Salesforce, and MicroStrategy to uncover actionable insights, drive revenue growth, and optimize profit margins; regularly present findings to senior executives to inform strategic decision-making.
  • Lead and mentor a team of three account managers, overseeing hiring, training, and performance reviews.
  • Evaluate and forge strategic partnerships with potential vendors to support the successful launch of new products.
  • Represent Magnite at key industry events, fostering relationships with senior leaders and stakeholders to drive strategic engagement and industry positioning.
  • Facilitate cross-functional meetings with internal and external partners to gather insights on new product offerings, presenting key information to the sales team to ensure effective selling.

Account Director

Magnite
01.2023 - 12.2024
  • Monitor and optimize programmatic campaign delivery and performance for mid-sized agency clients, troubleshooting and escalating issues while identifying optimization and up-selling opportunities.
  • Lead media planning efforts, including inventory forecasting, curating targeted site lists, and recommending product offerings throughout the RFP process.
  • Facilitate client calls to review campaign performance, troubleshoot issues in collaboration with DSP partners, and ensure timely resolution (within 24 hours) to optimize budget delivery.
  • Act as a client advocate, providing feedback to Product, Marketing, and Technical Support teams to improve customer outcomes.

Account Manager

Magnite (Formerly Telaria)
07.2018 - 12.2023
  • Manage, optimize, and execute $1M+ annual budgets across video and display managed service campaigns, acting as the primary point of contact for clients throughout the campaign lifecycle.
  • Deliver weekly performance reviews, in-depth wrap-up reports, and Quarterly Business Reviews to clients.
  • Create and update marketing materials (pitch decks, one-pagers, case studies) to support new business opportunities.
  • Coordinate with third-party vendors to execute campaign add-ons, such as brand lift and attribution studies.

Education

Bachelor of Arts - Communication Studies & Business Management

Wilfrid Laurier University
Waterloo, ON
05-2017

Skills

  • Programmatic advertising
  • Data analysis
  • Media planning
  • Customer service
  • Performance optimization
  • Team leadership
  • Salesforce CRM
  • Tableau analytics
  • Google Workspace
  • Excel

Websites

Timeline

Senior Account Director, Demand Solutions

Magnite
01.2025 - Current

Account Director

Magnite
01.2023 - 12.2024

Account Manager

Magnite (Formerly Telaria)
07.2018 - 12.2023

Bachelor of Arts - Communication Studies & Business Management

Wilfrid Laurier University

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MACKENZIE CLAPPERTON