Senior Manager, New Stream - Sell Side

dentsu•New York, NY

5d•$82,000 - $110,000•Hybrid

About The Position

The New Stream Media team at dentsu leads strategy, activation, and optimization for a large Retail Media client. We are looking for a dynamic, organized, and highly collaborative leader to join our growing team. This role will report to the Group Director, Commerce & Retail Media. As a Senior Manager, you will serve as the primary strategic partner across your client portfolio, responsible for developing growth strategies, identifying opportunities, solving business challenges, and strengthening client and partner relationships. You will play a critical role in supporting the planning, execution, and ongoing management of retail media campaigns and supplier partnerships, ensuring work is delivered accurately, on time, and with a high level of quality. This role is ideal for someone who can create strong governance and communication practices, manage multiple priorities, and proactively troubleshoot issues ranging from campaign delivery needs to more complex operational or technical challenges.

Requirements

Bachelor’s degree in Marketing, Business, Communications, Analytics, or a related field preferred
4+ years of digital performance marketing experience in eCommerce, retail media, search, programmatic, or a related field
2+ years of experience leading retail media or eCommerce programs preferred
Experience working with retail media platforms, DSPs, search platforms, or related digital advertising technologies preferred
Strong project management and organizational skills, with the ability to manage multiple priorities, competing deadlines, and evolving business needs
Strong business acumen and problem-solving skills, with the ability to identify opportunities, resolve issues, and drive solutions to completion
Strong written, verbal, presentation, and storytelling skills, with the ability to communicate effectively across stakeholders and teams
Experience developing campaign recaps, performance reports, and optimization recommendations
Strong analytical mindset with the ability to interpret performance data and translate insights into actionable business recommendations
Advanced proficiency in Microsoft Excel and PowerPoint; experience with formulas, pivot tables, and large datasets preferred
Ability to work independently while collaborating effectively within a team environment
Enthusiasm for retail media, eCommerce, and the evolving digital advertising landscape

Responsibilities

Serve as the strategic account lead across assigned accounts, translating client priorities and business challenges into account strategies and growth opportunities
Own account and campaign workstreams, ensuring timelines, deliverables, documentation, stakeholder follow-ups, and key milestones are managed effectively
Build strong relationships and coordinate effectively across suppliers, retailers, vendors, Sales, Planning, Analytics, Activation, and Account Management teams to ensure seamless communication and execution
Lead day-to-day campaign execution across setup, QA, launch readiness, pacing, and reporting in partnership with internal teams and external partners
Monitor campaign performance, identify risks or opportunities, and support development of performance recaps and optimization recommendations
Troubleshoot client, supplier, and campaign-related issues, escalating when needed and driving timely resolution across stakeholders
Contribute to process improvement initiatives, training materials, documentation, and best practice development
Provide guidance to junior team members and help reinforce consistent ways of working across assigned accounts
Support ad hoc strategic and operational initiatives in a fast-paced, evolving environment