Hasan Ramusevic is Founder and CEO of HARMONIUM, a consultancy focused on agency engagement, growth strategy, and M&A advisory. Over a 35+ year career, he has led more than 500 agency reviews across creative, media, digital, PR, and integrated disciplines. Hasan is known for helping marketers and agencies build stronger, more productive partnerships through a more human, transparent, and strategic approach to agency relationships. He advises both brands and agencies on partnership optimization, compensation, organizational alignment, and long term growth.
