(ShareCast News) - Shares in AIM-listed RTC Group plummeted as the recruitment firm said delays to infrastructure projects has meant that results for the full-year are to be lower than current market expectationsThe company said that while trading in the first half of the year was in line with expectations, the second half had seen delays in the start of infrastructure projects which is affecting trading.The delays have affected the short-term performance of the ATA recruitment consultancy business, primarily in its permanent vertical market activity.The infrastructure projects are expected to start in the near future and the company said it remained confident in the overall future prospects of the business.Ganymede, the recruitment business which focuses on rail, energy, engineering and construction industries, "continues to perform well and in line with expectations".Shares in RTC Group were down 25.23% to 40p at 0859 BST.