The two positions are effective immediately, according to a news release.
Lewis was previously president of the Americas division with responsibility for leading the company’s Watch and Buy growth strategy in Latin America. He also managed the business performance and strategic direction of Nielsen Buy in the U.S. and Canada.
“The past seven years have been full of growth, innovation and positive change for Nielsen and I’m pleased to take on a new and expanded role, leading all commercial teams worldwide,” Lewis said in the release.
Fichuk has been with Nielsen for more than 20 years. Most recently, she was the North American commercial go-to-market leader. In her previous role, Fichuk introduced new service models to better address the needs of the company’s clients in a competitive CPG marketplace. She was also a global client leader for Kraft and Mondelēz.
“Karen Fichuk has been with Nielsen for over 20 years, gaining broad experience across Nielsen’s extensive retailing and manufacturing client base. I have tremendous confidence in her ability to move the business forward with her commitment to analytics and big data outcomes,” Lewis said.