Having that background, Brother Barber was well - qualified when in 1948 he was assigned as a traveling minister, visiting assemblies and congregations all over the western part of the United States.
Tänu sellisele ettevalmistusele sai vend Barber pädevaks alustama aastal 1948 reisiva jumalateenija tööd, mida tehes ta käis kokkutulekutel ja külastas kogudusi kõikjal USA lääneosas.