Revenue during the quarter went down marginally by 1.39 percent to $4,297.65 million from $4,358.35 million in the previous year period. Gross margin for the quarter contracted 62 basis points over the previous year period to 3.28 percent. Total expenses were 98.71 percent of quarterly revenues, up from 96.71 percent for the same period last year. That has resulted in a contraction of 200 basis points in operating margin to 1.29 percent.

Operating income for the quarter was $55.39 million, compared with $143.39 million in the previous year period.

However, the adjusted operating income for the quarter stood at $219.50 million compared to $188.20 million in the prior year period. At the same time, adjusted operating margin improved 79 basis points in the quarter to 5.11 percent from 4.32 percent in the last year period.

"Drawing on our full suite of capabilities and global reach, AECOM's strong momentum has continued into fiscal 2017," said Michael S. Burke, AECOM's chairman and chief executive officer. "Our first quarter wins totaled nearly $6 billion, highlighted by the selection of our joint venture for the more than $1 billion decommissioning of the San Onofre Nuclear Generating Station (SONGS). Importantly, our confidence in the five-year financial targets that we introduced in December is bolstered by the bipartisan support for infrastructure, the more than $200 billion global nuclear decommissioning market, prospects for increased defense spending, and the new administration's emphasis on improving the climate for business investment in the U.S."

For financial year 2017, the company projects diluted earnings per share to be in the range of $2.15 to $2.55. The company projects diluted earnings per share to be in the range of $2.80 to $3.20 on adjusted basis.