Carrie Hightman, who served as president and CEO of Columbia Gas of Massachusetts, once a subsidiary company of Merrillville-based NiSource, is retiring.
Michiana's Leading Regional Business News Site
Michiana's Leading Regional Business News Site
Carrie Hightman, who served as president and CEO of Columbia Gas of Massachusetts, once a subsidiary company of Merrillville-based NiSource, is retiring.