Ketchum Pleon Change, formerly known as Stromberg Consulting, was created over 35 years ago in New York. In 2001, Ketchum Inc., a global public relations firm in the Omnicom Group acquired Stromberg.  Increasingly, Ketchum's clients asked for help in tackling their organizational effectiveness challenges.  Stromberg was the perfect answer.  

Since Stromberg's acquisition, the firm continued to grow its practice in North America through offices in New York, Atlanta, and Chicago. In 2007, we opened an office in London to better serve our global customers.  In 2009, Ketchum merged with Pleon, the leading European communications consultancy.  In 2010, Stromberg Consulting officially became Ketchum Pleon Change, which includes Pleon's former Change & Transformation Practice.  The launch of our new business almost doubles the size of our organization and extends our European reach via a new hub in Munich.