Founded and was CEO and President of the RKMiller Lumber Company, Scranton, Pennsylvania with warehouses in Elmira, New York, Scranton, Pennsylvania.
He was noted for being the first to develop wholesale distribution sites for building materials for regional retail lumber yards and providing distribution of manufacturers products from across the United States.
RK, as he was known to business colleagues, friends and family, was also a 33rd degree Mason. He actively participated in the Scranton Consistory providing leadership, support for remodeling of the community stage and also directing and forming in a number of the community stage performances.
He was active in the regional Methodist Church activities and building programs.
He also was active as a Dartmouth College fundraiser.
He was also President of the Onyx Real Estate Corporation withholding in Pennsylvania and New York State. He also developed and remodeled home and apartment buildings throughout Lackawanna County.
At one time, he was the largest real estate holder in Clarks Green, Pennsylvania.