Manager, Client Leadership- eCommerce

Mars United℠ Commerce is a global commerce marketing practice that aligns people, technology, and intelligence to make the business of our clients better today than it was yesterday. Our worldwide capabilities coalesce into four key disciplines — Strategy & Analytics, Content & Experiences, Digital Commerce, and Retail Consultancy — that individually deliver unmatched results for clients and collectively give them an unparalleled network of seamlessly integrated functions across the entire commerce marketing ecosystem.

These disciplines are powered by our industry-leading technology platform, Marilyn®, which helps marketers understand the total business impact of their commerce marketing activation, enabling them to make better decisions, create connected experiences, and drive stronger, measurable results. Learn more at

We are seeking a Manager, Client Leadership- eCommerce. Please note, this is not a sales role. Ideal candidates must have CPG or shopper marketing agency related experience including Amazon or Instacart.
Candidate must reside within a commutable distance to our Toronto office for a hybrid work schedule.

• Work with the internal cross-functional team (Strategic Planning, Media, Client Leadership and Creative) to develop optimal and actionable strategies, concepts and tactics
• Have a strong understanding of media capabilities from Search to Display
• Manage the implementation of key client projects
• Build strong working relationships with assigned retailer client contacts
• Manage execution of approved programs through team
• Work with external client vendors/agencies to execute projects as assigned
• Approach and manage partnership relationships with other manufacturers or properties
• Identify retailer direct and manufacturer platforms
• Develop and manage project timelines and budgets
• Manage communication of project status and budget to client teams
• Work hand-in-hand with internal teams on planning and implementation of retail marketing extensions of brand and category programs (national retainer clients)
• Measure post-promotion results using agency and client-provided data
• Be comfortable using AI in media planning, execution, and program wrap up

• Bachelor’s degree in advertising, marketing, business, or related field
• 5-7 years’ experience in marketing in ecommerce in Amazon or Instacart
• Proven Project Management experience
• Experience working with retail media networks and media vendors
• Strategic thinking in the development of Shopper Marketing programs and management of day-to-day business
• Sound decision making skills based in industry knowledge
• Passion about business – always thinking of ways to improve/grow assigned client/business
• Strong listening skills and attention to detail
• Excellent verbal, written, presentation and interpersonal skills
• Desire to dig in and do what’s needed to get the job done right

Our Publicis Groupe motto “Viva La Différence” means we’re better together, and we believe that our differences make us stronger. It means we honor and celebrate all identities, across all facets of intersectionality, and it underpins all that we do as an organization. We are focused on fostering belonging and creating equitable & inclusive experiences for all talent.

Publicis Groupe provides robust and inclusive benefit programs and policies to support the evolving and diverse needs of our talent and enable every person to grow and thrive. Our benefits package includes medical coverage, dental, vision, disability, as well as parental and family care leave and flexible time off.

If you require accommodation or assistance with the application or onboarding process specifically, please contact

Compensation Range: $75,050- $107,835 CAD annually. This is the pay range the Company believes it will pay for this position at the time of this posting. Consistent with applicable law, compensation will be determined based on the skills, qualifications, and experience of the applicant along with the requirements of the position, and the Company reserves the right to modify this pay range at any time.

Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan through a third-party benefits administration system once certain criteria have been met. For regular roles, the Company will offer medical coverage, dental, vision, disability and paid time off. The Company anticipates the Final date to receive applications for this job posting will be March 30, 2026.

All your information will be kept confidential according to EEO guidelines.