Senior Performance Media Associate, Planning

Agency: Critical Mass

Job Function: Media

Job Subfunction: Media Planning and Buying

Job Description:

Critical Mass is hiring a Senior Performance Media Associate, Planning to join our growing team. As the Senior Performance Media Associate, Planning, you will support the execution, reporting, and optimization of performance media campaigns across multiple channels. This role builds foundational expertise in data-driven media planning and supports the broader team in delivering measurable business outcomes.

You will:

Assist in building and maintaining media plans across digital channels
Support campaign setup, trafficking, QA, and tracking implementation
Maintain reporting dashboards and performance tracking systems
Ensure campaign details align with strategic direction and client goals
Compile campaign performance data and support reporting deliverables
Identify initial insights and optimization opportunities
Support A/B testing and performance evaluation efforts
Assist in translating data into basic client-facing summaries
Support day-to-day client requests and internal coordination
Work closely with Managers and Directors to execute media strategies
Maintain documentation, trafficking sheets, and reporting accuracy
Participate in training and skill development across media platforms

You have:

1–3 years of experience in media, marketing, or advertising
Exposure to digital media channels such as Search, Social, or Programmatic
Basic understanding of campaign metrics (CTR, CPC, CPA, ROAS)
Strong attention to detail and organizational skills
Willingness to learn performance media strategy and execution
What We Offer
Global maternity and parental leave
Competitive benefits packages
Vacation, compassionate leave, personal/sick days, and flex days
Access to online services for families and new parents
Early Dismissal Friday’s (off at 3:00 PM local time every Friday)
13 affinity groups
Internal learning and development programs
Enterprise-wide employee discounts


Toronto: $60,000-$80,000

Omnicom’s policy requires employees to work in the office for a minimum of three days a week, unless additional in-office days are directed by their agency or manager. Our objective is to increase this requirement over time, and many of our agencies as well as Omnicom’s corporate group already require five days of in-office attendance.

Omnicom is committed to hiring and developing exceptional talent. We agree that talent is uniquely distributed, and we’re focused on developing inclusive teams that can bring the best solutions to everything we do. We strongly believe that celebrating what makes us different makes us better together. Join us—we look forward to getting to know you. We will process your personal data in accordance with our Recruitment Privacy Notice.

Link to Recruitment Privacy Notice: https://www.omc.com/privacy-notice/