NiSource Corporate Services Co is a company based out of Delaware, United States. NiSource Corporate Services is based at our corporate headquarters in Merrillville, Indiana, and Columbus, Ohio. Corporate Services employees work in a variety of functions, including accounting, finance, communications, information technology, human resources and legal, supporting NiSource and its operating companies. Because these functions support all operating companies, they provide an opportunity to see all parts of the business, allowing room for movement, growth and advancement.