White-collar workers who walk out of the headquarters of the auto companies face few prospects in the Michigan economy. And with G.M. and Chrysler surviving on federal loans, facing a deadline Tuesday to submit new and broader restructuring plans to the government, the outlook grows only more bleak.

The market for the skills of auto engineers or designers in the prime of their careers has evaporated, with no hope in sight for a turnaround. Moving to another city is hardly an option when there are so few buyers for the suburban homes that would have to be sold first.

“I know it’s not great everywhere, but this is probably the worst place to find a job,” said Doug Zupan, a designer who took a buyout in November after working at Chrysler for six years. He was one of 5,000 salaried workers who accepted a buyout the day before Thanksgiving from his job at the Chrysler Technical Center in Auburn Hills, Mich.

Mr. Zupan, a 35-year-old father of three preschool-age children, said he was stunned by the sudden and rapid decline in an industry suffering through its worst sales in more than 25 years. “I am going to do my best to get out of the auto industry,” he said.

G.M., Ford and Chrysler have eliminated a total of 120,000 manufacturing jobs in the last three years. And now the cuts are drastically thinning the ranks of white-collar professionals, turning the once-bustling office towers of the companies into half-empty monuments to better days.