Bob is a representative of the charitable organization that brought Diego Ramirez to the US for surgery.
A boy named Diego had a large tumor on his face, so his parents tried to get him surgery in Venezuela, but no doctor there would touch it. Through Angels of Humanity, he was bought to Seattle for surgery to remove the tumor, where Donna and Bob took care of him. When the scandal involving Harper Avery broke, Donna and Bob said Angels of Humanity pulled their funding because they didn't want to be associated with the name. However, the surgery went on after Meredith offered for them to do it pro bono.
He works for Angels of Humanity, an organization which brings kids to the United States for medical procedures.