Quest Global investors Bain Capital and Advent International will exit in the transaction, while Quest Global will repurchase its own shares, Carlyle said in a statement.
Ajit Prabhu, chairman and CEO of Quest Global, will acquire an additional stake, Carlyle said.
Representatives for Bain Capital, Advent and Quest Global declined to comment on Quest Global's valuation in the deal.
Established more than 25 years ago, Quest Global focuses on engineering, research and development services for the design, product development and operations of complex engineering systems.
In 2016, Bain Capital and Advent, together with Singapore sovereign wealth fund GIC Pte Ltd (GIC.UL), jointly bought a minority stake in Quest Global for $350 million.
Persons:
Carlyle, Issei Kato, HONG KONG, Ajit Prabhu, GIC, Kane Wu, Yantoultra Ngui, Jason Neely, Mark Potter
Organizations:
REUTERS, Carlyle Group, Quest Global Services, Global, Quest Global, Bain Capital, Advent, Quest, Thomson
Locations:
Tokyo, Japan, HONG, Singapore, Asia, Hong Kong