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Assistant, MX Investment

Horizon Media
New York City, United Statesfull_timeVerifiedPosted 18 May 2026
💰 $50,000/yr($40,000/yr$50,000/yr)

About the role

Job Description

Who We Are   

Horizon Media, founded in 1989 by Bill Koenigsberg, is recognized as one of the most innovative marketing and advertising firms. We are headquartered in New York City, with offices in Los Angeles and Toronto. A leader in driving business solutions for marketers, Horizon is known for its highly personal approach to client service.  Renowned for its incredible culture, Horizon is consistently named to all the prestigious annual Best Places to Work lists published by Fortune, AdAge, Crain’s New York Business and Los Angeles Business Journal. Together we are building a place of belonging. 
 
At Horizon, we understand the value that different perspectives can bring to our clients and culture, so we strive for an environment where our employees feel welcomed, safe and empowered. We value YOU and believe that your authentic voice and unique perspective allows us to create a more rewarding culture, and experience, together. 

Our simple recipe for success? We hire talented people (thinkers, doers, dreamers, makers), challenge them and give them every opportunity to grow. 

Media Excel (MX) is Horizon Media’s principal-based buying arm focused on delivering value and financial solutions for clients. MX identifies emerging market trends and makes investments with media, tech, and data partners to deliver advantageous rates and terms to Horizon clients. 

 

What You’ll Do  

 

Media Investment and Negotiation – 15% 

  • Assist in the negotiation of pricing with media vendors across multiple media types 

  • Manage communication with vendors to ensure timely receipt of schedules and plans 

  • Collaborate with MX team to ensure vendor plans meet all pricing and guideline requirements and manage follow ups with vendors as needed 

Campaign & Data Management & Execution - 40% 

  • Assist in management of day-to-day communication with internal teams as well as external vendors 

  • Schedule inputs and QA in SBMS and Core 

  • Assist with tagging and trafficking of digital buys 

  • Request prelogs form networks in advance of upcoming week to ensure schedules will run as planned and alert internal team to any variances 

  • Assist in evaluation and acceptance of makegoods, ADU’s and plan changes 

Billing Reconciliation – 15% 

  • Check that invoices are input correctly by the billing department 

  • Request any missing invoices from vendors 

  • Resolve billing discrepancies  

  • Work with your manager and Ops to make sure all billing adjustments are complete before client billing is approved 

Reporting & Analysis - 10% 

  • Collect and enter TV post-log data into Core/SBMS on a weekly basis for reporting 

  • QA reporting to make sure post log airings match schedules purchased 

  • Create and maint

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Company

Horizon Media

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