CHICAGO, March 29 (UPI) -- Twenty percent of U.S. workers do not know what the top executive of their corporation looks like, a CareerBuilder survey released Thursday said. In a poll of more than 7,000 workers, conducted by Harris Interactive, the majority of respondents -- 60 percent -- indicated that they had met the chief executive officer of their company and 40 percent said they had not. The numbers varied by region and occupation. In the South and the Midwest, 23 percent of workers said they did not know what their CEO looked like. In the East, 18 percent said they did not know, while 19 percent of respondents in the West said they did not know. Workers in sales, manufacturing and business services were most likely to indicate they had met their CEOs, while workers in information technology, financial services and retail were the least likely to indicate they had met their top executive. The survey was conducted Nov. 9 through Dec. 5. The results include a margin of error of plus and minus 1.11 percentage points.