He was a generous supporter of the RiverPark Center and served on its Foundations Board of Trustees for several years.
He served on the Board of Trustees of Kentucky Wesleyan College (KWC) from 1984 to 1993. He chaired the development committee for those nine years. He was Vice-Chairman of the board from 1989 to 1992 and was elected trustee emeritus in 1997. He helped found the annual community event, Concert on the Lawn which is performed each summer by the Owensboro Sympathy Orchestra on the front lawn of KWC. This event is free to the public.
His $1 million gift to KWC for their library was donated to honor his son Howard Greenwell who passed away in 1991 at age 35. This gift was graciously acknowledged by the school by naming the library building in honor of his son.