The issue may be priced as early as today, after the company ended a three-day roadshow on Tuesday, the source said.
ICTSI has hired HSBC and JPMorgan for the debt issue. The firm plans to list the bonds in Singapore.
Established in 1987, ICTSI operates in Brazil, Poland, Madagascar, Japan, Indonesia, Syria, China, Ecuador, Colombia, Georgia, Brunei and Argentina, besides the Philippines.