Most recently, Nienhaus led the engagement and development program for the 4As to build successful modern agency models.
In addition, he has worked for BBDO and Digitas, as well as holding companies Omnicom, IPG and WPP. Within that 10-year career, he launched two highly integrated agencies for Omnicom: We Are Unlimited with 200 employees and Velocity with over 60.
Nienhaus has worked for various major clients, such as AT&T, McDonald’s and J&J.
C-K's client roster has included Alzheimer’s Association, Cedar Fair (Knott’s Berry Farm, Cedar Point), Cintas, Corona, Porsche and Spirit Airlines.