Performance Media Analyst & Activation Specialist

Critical Mass; Toronto; Hybrid; CAD 55,000 - 65,000; Full time

Job summary

Critical Mass, an experience design agency, is seeking a data-driven marketing assistant to support performance media programs in Toronto. You will help plan, activate, measure, and report on campaigns, building strong analytical fundamentals and reliable execution to deliver insight-driven results.

Ideal candidates have exposure to marketing analytics, understand paid media basics, and can work with spreadsheets while maintaining QA and attention to detail.

Qualifications

• Experience in marketing, advertising, analytics, or related area.
• Understanding paid media basics, customer journeys, and performance KPIs.
• Comfort with spreadsheets and quantitative data.
• Strong attention to detail and data QA.
• Clear communication and collaborative work style.
• Organized, curious, dependable, and willing to ask effective questions.

Responsibilities

• Support media plans, campaign briefs, audience definitions, budgets, and KPI documentation.
• Build and QA campaigns, tagging, tracking parameters, audiences, and conversions.
• Monitor delivery, pacing, budgets, and basic performance indicators.
• Pull, reconcile, organize, and visualize performance data for reporting.
• Conduct basic analysis to identify trends, anomalies, and optimization opportunities.
• Maintain naming conventions, logs, invoices, and records.
• Participate in team and client workflows while expanding platform knowledge.

Skills

Marketing analytics

Paid media basics

Data accuracy

Communication

Team collaboration

Tools

Spreadsheets

Job description

Critical Mass, an experience design agency, is seeking a data-driven marketing assistant to support performance media programs in Toronto. You will help plan, activate, measure, and report on campaigns, building strong analytical fundamentals and reliable execution to deliver insight-driven results.

Ideal candidates have exposure to marketing analytics, understand paid media basics, and can work with spreadsheets while maintaining QA and attention to detail.