Sr. Manager, Strategic Partnerships & Agency Development

Key Responsibilities

• Act as the primary strategic supporter to the VP, operationalizing the overarching agency partnership strategy and managing daily workflows to drive business objectives.
• Cultivate and maintain deep, daily relationships with core leaders, media planners, supervisors, and key influencers across holding companies and independent agencies.
• Partner closely with internal Sales, Client Services, Product, and Marketing teams to track deliverable timelines, align agency feedback with product roadmaps, and support revenue-driving initiatives.
• Own the development and rollout of partner-facing toolkits, POVs, playbooks, and case studies. Facilitate education and scaled learning sessions to ensure agency teams fully understand Big Happy’s unique value proposition.
• Monitor, analyze, and report on agency partnership performance, spend adoption metrics, and joint business plan (JBP) progress to internal leadership.
• Identify organic growth opportunities within existing agency accounts, support commercial deal structuring (such as endeavors or JBPs), and assist in pitches for net-new agency access.
• Execute Big Happy’s agency partnership framework across holding companies, independents, and specialty shops.
• Position Big Happy as a seamless, day-to-day extension of agency teams for DOOH, high-impact mobile execution, and offsite retail media.
• Coordinate GTM materials and lead training efforts to unlock net-new agency access and support Sales teams in deeper account penetration.

Skills, Knowledge and Expertise

• Bachelor’s degree or equivalent work experience.
• 5+ years of professional experience specifically within agency development, retail media, or broader ad tech ecosystem management.
• Exhibit a natural “builder” mentality with a strong focus on seamless execution and independent workflow management.
• Deeply understand the nuances of agency operating structures, holding company dynamics, and contemporary media activation strategies.
• Demonstrate a history of fostering account growth and the confidence to present effectively to mid-and-senior-level external agency leadership.
• Communicate with clarity, effectively distilling complex technical platform features into tangible business value for media planners and strategists.
• Strong analytical skills with an ability to leverage performance metrics and spend data to drive joint business objectives.

Description

Focus: Agency Partnership Execution, Account Management, and Enablement

Department

Sales

Location

New York

Compensation

$140,000 - $180,000 / year