Managing Director, Client Partnerships - Mediamath

Infillion • New York, NY

5d • $350,000 - $400,000 • Remote

About The Position

Infillion is seeking a Managing Director, Client Partnerships to expand its presence in the U.S. market. This is a new business development role focused on engaging independent and mid-market agencies and brand-direct clients who have not yet utilized Infillion's DSP. The role involves selling a differentiated product that combines MediaMath's programmatic infrastructure with value-exchange engagement formats, Gimbal's location intelligence, and Catalina's purchase-based audience data. The position has a national scope, with emphasis on relationships rather than physical location.

Requirements

• 7–10+ years of programmatic media sales experience, with a demonstrated track record in new business development
• Established relationships across independent and mid-market agencies and brand-direct advertisers
• Deep fluency in the programmatic landscape: DSPs, SSPs, identity solutions, data partnerships, and the open web
• Experience selling multi-layered platforms — you know how to build a value narrative that goes beyond a single product or format
• Consultative and value-based selling skills; you lead with outcomes and back them up with data
• Proficiency in Salesforce and a structured, disciplined approach to pipeline management
• Strong executive presence and presentation skills; you're comfortable in the room with CMOs and senior agency leadership

Nice To Haves

• A relationship-driven hunter. You have a track record of opening and closing net new accounts — not just managing what's handed to you. You know how to build trust quickly and earn a second conversation.
• A dual-threaded seller. You're equally comfortable with agency partners and brand-side stakeholders. You understand how buying decisions actually get made, and you work both sides of the table without missing a beat.
• A platform thinker. You connect the dots between data, technology, and media outcomes in a way that resonates with sophisticated buyers. You lead with business problems, not feature lists.
• A self-starter. Your 30-60-90 is already taking shape. You've identified your targets. You're ready to hit the ground running and make an impact quickly.

Responsibilities

• Prospect, pitch, and close net new business with independent and mid-market agencies and brand-direct advertisers across the U.S.
• Build and manage a pipeline of qualified opportunities from first conversation through signed partnership
• Lead consultative discovery to understand client-specific challenges and connect Infillion's platform to measurable outcomes
• Develop and deliver compelling proposals in collaboration with Sales Planning and Solutions Engineering
• Represent Infillion externally as a programmatic thought leader: at industry events, in trade conversations, and across the advertising community
• Drive DSP adoption by positioning Infillion's capabilities against real client needs
• Partner closely with Client Success at close to ensure smooth handoffs and strong account starts
• Maintain disciplined pipeline hygiene in Salesforce and provide regular, reliable forecast visibility

Benefits

• Base salary of $175,000–$200,000 plus commission, with on-target annual earnings of $350,000–$400,000
• 100% company-paid health, dental, and vision coverage for you and your dependents
• Company-paid life insurance, short-term and long-term disability
• Unlimited paid time off — we trust your judgment
• Opportunities for profit sharing, bonuses, and ownership
• 401(k) plan
• Cell phone reimbursement

What This Job Offers

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