Engineering and construction services company Jacobs Engineering ( JEC) said third-quarter earnings rose 38.3% from a year ago, helped by higher revenue. The company earned $50.6 million, or 84 cents a share, in the quarter, compared with $36.6 million, or 62 cents a share, a year ago. Adjusted for stock option expenses, Jacobs earned 88 cents a share in the latest quarter, as against analysts' expectation of 76 cents a share. Revenue rose 32.9% to $1.93 billion. According to Thomson First Call, analysts had estimated a revenue of $1.81 billion for the third quarter. The Pasadena, Calif.-based company's revenue from technical professional services rose 17.6% to $872 million, while the revenue from field services jumped 49% to $1.05 billion. Jacobs' reported order backlog totaling $9.4 billion at the end of the third quarter compared with $8.4 billion a year ago. For the full year, the company expects earnings per share growth of 27% to 30% before expensing for stock options.