
About the Company
Infillion is the first fully composable advertising platform, built to solve the complexity, waste, and opacity in the digital media ecosystem of the last decade. Born from $750 million in investment and the unification of category-defining technologies, including MediaMath, TrueX, Gimbal, Drawbridge, and most recently Catalina, Infillion engineered these powerful assets into scores of interchangeable, agentic-ready components.
Infillion provides a single, flexible infrastructure that serves media buyers, tech decision-makers, and media sellers. Whether through white-glove managed service, self-service control, or API-based automation, Infillion empowers businesses to execute their unique strategies with zero-hop efficiency, proprietary AI logic, and radical data transparency. Headquartered in New York City, Infillion powers the world's leading brands, agencies, and platforms. Learn more at www.infillion.com
About the Job
The Principal Client Partner role will be tasked with selling the MediaMath DSP, a self-service programmatic advertising platform, to brands and agencies. Experience and agency/client relationships within key markets in the area are important to succeed in this role, as well as an express ability to demonstrate recent business successes in this location.
You will be a key member of a fast-paced and quickly growing sales team. Your focus, and that of your team, is the positioning, presentation, and execution of partnerships leveraging Infillion’s unique value-exchange engagement ads as well as location technology and media execution platform.
What you will be doing:
Who you are:
A tenacious sales professional: You love the thrill of landing a new account or sale and consistently strive to exceed expectations.
A well-connected social butterfly: The only thing that grows faster than your closed sales is your Rolodex. Your relationships span beyond whatever company you are with or product you are selling.
A mover and a shaker: You’re two steps ahead of the person who’s two steps ahead, and you’ve probably already started your 30-60-90 day sales-plan
What you have:
Benefits & Perks
It’s no secret that we work hard, but we also strive to create an office environment where the lines between work and play are blurred. This means we offer these great perks to help keep our team healthy, productive, and happy.
We are committed to an inclusive and diverse work environment. Infillion is an equal opportunity employer. We do not discriminate based on race, color, ethnicity, ancestry, national origin, religion, sex, gender, gender identity, gender expression, sexual orientation, age, disability, veteran status, genetic information, marital status or any legally protected status.

Infillion is the only global media platform combining the power of MediaMath’s industry-leading data and technology with the unrivaled performance of TrueX’s interactive video and CTV technology. Infillion works with more than 1,400 of the world’s leading agencies and brands with premium managed- and self-service cookieless media solutions that deliver guaranteed attention in an increasingly opaque media environment.
Infillion is headquartered in New York City, and owns MediaMath, Gimbal location-based technology, InStadium, NeXt, Analytiks.ai and Phonic.ai. The company is one of the most awarded ad-tech companies in the media, marketing, advertising and technology industries and is now one of FastCo’s Most Innovative Companies.