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 recent 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.

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At Omnicom Group, careers are designed for growth. We’ve purposefully crafted a transformative talent experience built with accountability in action — focused on community, impact, and opportunity.

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📌 Senior Performance Media Associate, Planning (Toronto)
🏢 CMICA Critical Mass
📍 Toronto