Coordinator, Client Experience

We are Assembly, a leading global omnichannel media agency that merges data, talent, and technology to catalyze growth for the world's most esteemed brands.

Our holistic approach weaves together compelling brand narratives with a comprehensive suite of global media capabilities, driving performance and fostering significant business expansion.

Our initiatives are powered by STAGE, our proprietary operating system, and executed by a dedicated global team of over 3,000 professionals across 44 offices worldwide.

Committed to purposeful action, we lead the way in social and environmental impact within the agency realm.

As a proud member of Stagwell, the challenger network designed to revolutionize marketing, Assembly continues to set new standards of excellence.

ICYMI: Assembly was named Campaign’s 2025 Most Innovative Agency and Sustainability Standout and 2024 Media Agency of the Year.

Our innovative work has also earned prestigious accolades, including The Webby Awards, Effies, and Cannes Lions.

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Assembly is looking for a Coordinator, Client Experience (Assistant Media Planner) in developing, executing, and monitoring media plans for assigned clients .

You will be responsible for gathering and organizing data required to develop strategy and media plans to deliver client work .

• Builds rapport with key internal teams
• Understands the importance of deadlines and works to ensure deadlines are met with continuous follow-up with manager
• Supports Senior Manager and Associate Manager in media plan development and makes necessary revisions to tactical media plans to ensure they are up to date.
• Understands the role of each media channel and its contribution to marketing
• Prompt communication between Finance and Activation for billing and reconciliation
• Works in collaboration with Research Team on competitive reporting
• Assists in researching media opportunities
• Researches and contributes to POVs
• Set up client in all planning and finance systems/tools
• Supports billing which includes monthly vendor invoice reconciliation; creating monthly client billing invoice packets; reviewing activation team buy entries for accuracy; monitoring client aging reports and requests late payment updates; investigating vendor inquiries due to late payment
• Track project tasks and work closely with internal teams and shared Project Manager to manage processes efficiently