Research group Dun & Bradstreet said Sunday there was a 27 percent rise in the number of professional jobs and a 20% increase in general employment available at the 20 largest engineering firms in Israel in 2005. The top five companies had revenues of $358m. last year, D&B said, showing an increase of 16%. The biggest of these, the Baran Group, employed 1,250 professional engineers, compared to 900 employees in 2004, and had $210m. in revenue. In second place, Ludan Engineering employed 436 engineers, followed by the Tahal Group with 365 workers.