ISS Resolution evolved from Siam Unisys which was formed in 1990 as a joint venture between Unisys, a worldwide information technology company which provides a portfolio of IT services, software, and technology to clients, and Yip In Tsoi, which provides hardware, software and service solutions to serve all aspects of Information Technology. In 1999 Siam Unisys was reformed under the American Amity Treaty, and renamed Unisys Thailand, a fully owned subsidiary of Unisys. In August 2009 Unisys Thailand was subject to a local management buy-out and became a locally owned Thai Limited Company.

On September 1st 2009 the company name was changed to ISS Resolution

ISS Resolution is founded on the rich heritage of Unisys, a worldwide, world-class services and solutions provider that prides itself on its collaborative approach, inventive solutions, and committed people; a company that combines its expertise in Outsourcing, Systems Integration, Infrastructure, and Security to deliver solutions that really matter to clients, and continues to provide End User Outsourcing and Support Services to both local and global clients.

Copyright 2010 ISS Resolution Ltd.