Senior Client Success Manager

Nexxen • New York, NY

1d • Hybrid

About The Position

Flexible advertising, unified by data. Nexxen empowers advertisers, agencies, publishers and broadcasters around the world to utilize data and advanced TV in the ways that are most meaningful to them. Our flexible and unified technology stack comprises a demand-side platform (“DSP”) and supply-side platform (“SSP”), with the Nexxen Data Platform at its core. With a global footprint, you can be part of a team that is transforming advertising through our creative, flexible and unified solutions. Employees hustle, commit and dedicate themselves to pillars that make up the Nexxen Way – the 3Cs - Customer Centric, Curious Mindset, Collaborative with No Ego. The Senior Client Success Manager at Nexxen owns two core functions: managed service campaign management and programmatic PMP deal execution, while also serving as a strategic lead across a portfolio of high-value advertiser relationships. As the primary point of contact, you drive long-term client satisfaction, retention, and revenue growth through advanced campaign execution, data-driven insights, and deep technical expertise across Nexxen's full product suite, including our SSP, DMP, and deal infrastructure. In this role, you will operate as a strategic advisor to clients and an internal leader across cross-functional teams. You proactively identify opportunities to expand partnerships, shape account strategy, and influence client investment decisions. Beyond execution, you set best practices, mentor junior team members, and help scale processes that improve efficiency and client impact.

Requirements

• 4+ years in a client-facing account management or operations role within a DSP, SSP, media agency, or publisher
• Proven track record managing programmatic campaigns across CTV, online video, and/or display
• Proven track record of leading campaign strategy, execution, and performance optimizations
• Experience with PMP deal management, SSP platforms, and programmatic deal troubleshooting
• Strong analytical mindset with the ability to translate data into actionable narratives
• Excellent communication skills, able to explain technical concepts clearly to both clients and internal teams
• Highly organized with proven ability to manage competing priorities in a fast-paced environment
• Proficiency in Excel (pivot tables, large datasets) and PowerPoint
• Familiarity with Salesforce, ad servers, brand safety, and verification platforms

Responsibilities

• Serve as the primary post-sale contact for a portfolio of managed service and programmatic advertiser accounts, building deep, trust-based relationships that drive retention and growth
• Diagnose client needs and develop tailored strategies that generate measurable results and incremental revenue for Nexxen
• Onboard new clients through platform demos, training sessions, and ongoing education on Nexxen's offerings and deal capabilities
• Support quarterly regional growth goals through proactive upsell and cross-sell activity grounded in data and performance insights
• Own end-to-end campaign delivery across managed service and PMP channels; including setup, launch, pacing, optimization, and performance reporting against KPIs
• Manage the full PMP deal lifecycle: deal setup, targeting configuration, implementation best practices, QA, and ongoing troubleshooting
• Execute multi-channel programmatic campaigns across CTV, online video, and display with a focus on precision and performance
• Support audience activation and targeting strategies through Nexxen's Data Management Platform (DMP)
• Maintain accurate campaign records and account documentation in Salesforce and internal systems
• Act as a trusted advisor on Nexxen's DSP/SSP offerings — translating complexity into clear, actionable guidance for clients
• Leverage performance data, market trends, and Nexxen's full product suite to develop proactive campaign recommendations and identify upsell opportunities
• Collaborate cross-functionally to troubleshoot campaign and deal performance, surfacing creative solutions that meet evolving client needs
• Mentor newer team members and contribute to onboarding, training, and best practices documentation
• Maintain internal reference resources covering benchmarks, platform capabilities, and QA processes
• Champion a collaborative, high-performing team culture that reflects Nexxen's values

Benefits

• medical
• dental
• vision
• disability insurance
• 401(k)
• EAP
• parental leave
• unlimited vacation
• company-paid holidays

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed