Based in both Raleigh and Dallas and reporting directly to Founder, CEO and Creative Chairman Shon Rathbone, Belloir will lead business development efforts across the agency, including fostering new client relationships, managing incoming opportunities and RFPs, and strengthening partnerships with search consultants and industry stakeholders.
“Kat brings the kind of experience and emotional intelligence that’s incredibly valuable in today’s agency landscape,” said Shon Rathbone, Founder, CEO and Creative Chairman of 3Headed Monster. “She understands that business development is ultimately about relationships, trust, and identifying the right long-term partnerships. As we continue growing the agency, we wanted someone who could help us approach that growth thoughtfully and strategically, and Kat was the perfect fit.”
Belloir has spent her career helping agencies identify growth opportunities, build lasting client relationships, and navigate evolving business needs. She most recently spent 13 years at Baldwin&, where she held multiple leadership roles across account management and agency growth initiatives, working for brands including Volvo Trucks, Burt’s Bees, Epic Games, and more. Prior to Baldwin&, she held positions at Mullen and McKinney, building experience across integrated marketing and client services.
Her appointment comes at a time of continued momentum for 3Headed Monster following recent business wins and expanded national visibility, including the agency’s appointment as creative agency of record for Valvoline Instant Oil Change, Saucy! By KFC, and La Madeleine earlier this year.
“I’ve always been drawn to agencies with a strong point of view and a genuine sense of culture, and 3Headed Monster immediately stood out in that way,” said Belloir. “There’s a unique combination of creativity, ambition, and authenticity here that resonates with me. I’m excited to build new relationships and help shape the agency’s future.”
Beyond her agency career, Belloir also serves on the Board of Directors for the Boys & Girls Clubs of Wake and Johnston Counties, where she previously served as Board President.
She begins her role effective immediately.


