With more workers vying for summer jobs this year, those looking for seasonal employment need to prepare for a challenging job market. Nearly a quarter (23 percent) of employers plan to hire seasonal workers for the summer, in line with last year's findings, but the competition for those jobs will be stiffer than in years past due to high unemployment and a tough economy. This is according to CareerBuilder's Annual Summer Job Forecast that was conducted from February 20 to March 11, 2009, among more than 2,500 employers.