The group has offices in Greater China, United Kingdom, India, Pakistan, Singapore, Malaysia, Indonesia, Thailand, Vietnam, the Philippines, the Middle East and Africa, according to information on its website.
The group says that, by revenue, it is ranked among the largest independent engineering consulting firms globally.
It has expertise in consulting on Civil & Infrastructure, Planning & Urban Development, Structural Engineering, Mechanical, Electrical and Plumbing Engineering, Project Management, Water & Environment.
According to information leaked on the dark web, the group, which has its headquarters in Singapore, about one terabyte of information was leaked from the company before the encryption of files was effected.
While the gang that carried out the attack warned that it would leak the company's data within 72 hours after the notification, there has been no further statement made. Nor is the data available.
But there are quite a few screenshots of technical drawings and listings of computer directories on the dark web site used by the ransomware group.
iTWire contacted the company on 14 September, but has still not heard back. A reminder has been sent on Thursday.
There is no media email address on the company's website for making contact; there is only a generic one to which the query was sent.