Agency:
Critical Mass

Job Function:
Media

Job Subfunction:
Media Planning and Buying

Job Description:
Critical Mass is hiring a SeniorPerformanceMedia Associate,Planningto join our growing team.As the SeniorPerformanceMedia Associate, Planning, you willsupport the execution, reporting, and optimization of performance media campaigns across multiple channels. This role builds foundationalexpertisein data-driven media planning and supports the broader team in delivering measurable business outcomes.

You will:

Assistin building andmaintainingmedia 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

Identifyinitial insights and optimization opportunities

Support A/B testing and performance evaluation efforts

Assistin 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)

Solid 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/

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📌 Senior Performance Media Associate, Planning (Ontario)
🏢 Adelphi Group
📍 Ontario