Onyx Health is a healthcare marketing communications agency building campaigns that change the lives of patients. Founder Karen Winterhalter began her career as a nurse, moving into pharmaceutical sales and then communications. She has taken on some of the biggest communications roles in Europe, the Middle East and Africa. Onyx Health was created in 2003 from Karen’s desire to make a difference to patients. She wants to give her staff the same opportunities she received, mentoring them to be the best they can be.
