Senior Manager, New Stream - Sell Side

Job Description: 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 and serve as the primary strategic partner across the client portfolio, responsible for developing growth strategies, identifying opportunities, solving business challenges, and strengthening client and partner relationships. 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 Qualifications 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 Benefits Annual salary range: $82,000‑$110,000. Placement within the salary range is based on relevant experience, knowledge, skills, and other factors permitted by law. Medical, vision, and dental insurance Life insurance Short‑term and long‑term disability insurance 401(k) plan Flexible paid time off At least 15 paid holidays per year Paid sick and safe leave Paid parental leave Dentsu complies with applicable state and local laws regarding employee leave benefits, including, but not limited to, providing time off pursuant to the Colorado Healthy Families and Workplaces Act, in accordance with its plans and policies. Location: New York Dentsu is committed to providing equal employment opportunities to all applicants and employees. We do this without regard to race, color, national origin, sex, sexual orientation, gender identity, age, pregnancy, childbirth or related medical conditions, ancestry, physical or mental disability, marital status, political affiliation, religious practices and observances, citizenship status, genetic information, veteran status, or any other basis protected under applicable federal, state, or local law. Dentsu is committed to providing reasonable accommodation to, among others, individuals with disabilities and disabled veterans. If you need an accommodation because of a disability to search and apply for a career opportunity with us, please send an e‑mail to View email address on click.appcast.io. #J-18808-Ljbffr Dentsu Aegis Network Ltd.