Harry J. Pearce, chairman of MDU Resources board, said: “Sister Thomas’ contributions during her remarkable 22 years as a board member have been invaluable to the successful implementation of our diversified business strategy and the growth that it has produced. We thank Sister Thomas for her extraordinary contributions, and for helping ensure that as our company grew we have remained true to our core value of integrity and to our commitment to shareholders, employees, customers and the communities in which we operate. We will miss her counsel and the work of a true servant leader.”