Civil engineers can help people, too! My husband did a volunteer stint in the Dominican Republic and noticed an unfinished building. It turns out it was a church/community center/storm shelter. They couldn’t afford the steel-framed roof that a local engineer had designed. So DH did pro bono work and redesigned the roof with wood trusses. Then he talked to a wood truss company in the US that donated the trusses. Someone else in the States paid for shipping the trusses to the DR. So this very poor community got a structure that kept a lot of people safe during the last big hurricane that blew through. This is just one small example - you don’t have to be a physician to help people.