E-Commerce Manager

Company descriptionAbout Us:Zenith is the ROI Agency. Our more than 6,000 specialists across 95 markets offer unparalleled capabilities in Media, Data, Technology, Commerce and Content. We put effectiveness at the heart of our work to solve complex challenges, drive successful business outcomes, and grow our clients’ businesses. Zenith is part of Publicis Media, the media arm of Publicis Groupe.
Over the past year, Publicis Media has been transforming the way we do our business. From structuring our investment practice around data and digital to bringing our strategy, data sciences and research practice under one house, we’ve been shaping Publicis Media to be the media network of tomorrow. One that both you and I want to work at.
Publicis Media Canada is proud to be Great Places to Work™ certified and recognized with Best Workplaces™ for Today’s Youth. We provide continuing opportunities for career growth by fostering a diverse work environment that respects and supports individual contributions and opinions.
We also offer our employees market leading benefit and incentive programs. You’ll be provided with 3 weeks minimum vacation to start plus additional long weekend Publicis days, holidays closures, your birthday off, free Headspace memberships, wellness and technology credits, and a market leading savings plan.
We strive to provide what matters to you personally with the ability to choose and modify programs to suit your lifestyle
OverviewAs an E-Commerce Manager, you will lead end-to-end retail media campaigns across platforms like Amazon, Walmart, and Instacart, owning strategy, activation, optimization, and performance. You’ll translate client briefs into full-funnel plans, drive data-led insights, and present business reviews to senior stakeholders. The role also involves managing cross-functional teams and external partners while ensuring strong campaign governance, budgeting, and reporting. Additionally, you’ll mentor junior team members and establish best practices to improve performance and scalability.
ResponsibilitiesCampaign Leadership, Activation & Governance
Lead activation and optimization across Amazon, Walmart Connect, Instacart Ads, Criteo, Uber Ads, DoorDash Ads, and Loblaws (MediaAisle).
Own end-to-end campaign governance: creative requirements and QA, tracking/tagging (where applicable), flighting, budget allocations, pacing, keyword/bid/audience optimization, and ongoing brand safety + compliance checks.
Establish clear performance guardrails (KPIs, learning agenda, optimization cadence) and ensure timely escalation of risks (inventory/OOS, pricing gaps, creative fatigue, tracking/reporting issues).
Strategy & Planning
Translate client briefs into channel strategy and full-funnel plans: audience frameworks, targeting approach, measurement plan, and a structured testing roadmap (A/B tests, incrementality/lift, geo tests, creative tests).
Partner with commerce/retail readiness stakeholders to improve conversion and efficiency: catalog hygiene, PDP content, reviews/ratings, pricing and promo strategy, inventory checks, and OOS suppression.
Build and maintain media plans and forecasts (scenario planning, and sufficiency planning where needed).
Reporting & Insights
Own cross-platform reporting and insights across Walmart, Instacart, Criteo, Loblaws (MediaAisle) and other platform UIs;
ensure clean data, consistent definitions, and executive-ready reports.
Turn performance into a clear narrative: what happened, why it happened, what we learned, and what we’re doing next with actionable recommendations and quantified impact.
Client-Facing Ownership
Lead client communications and governance: set expectations, manage approvals and timelines, and proactively communicate trade-offs, risks, and recommended actions to senior stakeholders.
Present monthly business reviews and QBRs with a crisp story that ties media performance to business goals and identifies next-step decisions.
Partner & Cross-Functional Management
Manage senior relationships with Amazon, Walmart, Instacart, Criteo, Loblaws, and other partners/vendors to unlock opportunities, troubleshoot issues, and drive performance improvements.
Coordinate internally across analytics, creative, finance/billing, and account leadership to ensure operational excellence and scalable delivery.
Leadership & Team Development
Lead and mentor Specialists/Coordinators: define priorities, set clear standards, provide coaching, and support development plans.
Drive consistent ways of working: playbooks, QA checklists, pacing/SOV monitors, naming conventions, change logs, and structured post-mortems to improve performance over time.
Responsible for entering media buy inputs into Prisma in a timely manner, and coaching/teaching new team members and Coordinators on Prisma billing processes and best practices.
Ensure budget accuracy within PM media finance systems (including reconciliation checks and timely updates aligned to approved plans).
Update and approve BCR amounts monthly, ensuring alignment across pacing, invoicing, and finance governance.
QualificationsMust-haves
5+ years in retail media / performance marketing with deep, hands‑on Retail Media Search.
Knowledge of Walmart Connect, Instacart Ads, Criteo, Uber Ads, DoorDash Ads, and Loblaws (MediaAisle).
Demonstrated ownership of media planning, forecasting, pacing, and optimization across multiple accounts/campaigns.
Experience leading QBRs/business reviews and influencing senior stakeholders with data-backed recommendations.
Strengths
Strong analytical capability: comfortable with data aggregation, manipulation, and interpretation, and converting analysis into decisions.
Strong project and stakeholder management: can run multiple workstreams, manage ambiguity, and operate with urgency.
Clear communicator and strong storyteller (written + verbal), able to simplify complex performance into actionable takeaways.
People leadership mindset: capable of coaching, setting standards, and raising team performance.
Tools
Advanced Excel and PowerPoint.
Bonus: experience with full funnel programs at Loblaw and Walmart.
Additional informationTransparency matters to us. The salary range for this position is
$70,000-$80,000
per year. Actual compensation within this range will be based on a variety of factors, including relevant experience, knowledge, skills, and applicable certifications. This range reflects what we reasonably expect to offer based on current market data.
We use artificial intelligence (AI) tools to support parts of our hiring process, such as reviewing applications or analyzing resumes. These tools assist our recruitment team but never replace human decision-making. We believe in a human-first approach, where your experience and potential are recognized by people.
Starcom is an equal opportunity employer with a strong commitment to diversity and inclusion. We create and nurture a vibrant work environment that celebrates, values and leverages all aspects of diversity and inclusiveness, attracts world‑class talent and serves as the industry benchmark for best practices. We encourage applications from all qualified individuals and will provide appropriate accommodation for candidates with disabilities or accessibility needs throughout the recruitment process, upon request. Please contact our recruiter for any questions, accommodations or specific requests. We thank all candidates for their interest in Starcom however, only those candidates selected for an interview will be contacted.
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