The Emerald Crusaders had to make a living, and they did so while often on the move from city to city, job to job. Finding whatever employment was necessary to supplement their true careers as crime fighters, each Green Lantern found a diverse lifestyle while meeting interesting folk along the way.
Hal Jordan began his career as a test pilot at Ferris Aircraft, testing prototype planes for his employer Carol Ferris... herself running the company in behalf of her father.... while forming a friendship with mechanic Thomas Kalmaku Despite a budding romance between the two, tension developed and he eventually moved on. On Earth-Two, Ferris' counterpart corporation was All-American Aviation headed by Hop Harrigan and his mentor Prop Wash as well as his buddy mechanic Ikky, wherein they also tested some of Prop's flying inventions.
Undoubtedly, these Green Lanterns did not know how to root themselves in any one community for very long!