ISG, Acquisition, TPI, Sourcing

ISG Completes Acquisition of TPI

ISG Completes Acquisition of TPI, The Global Leader in Sourcing Advisory Services

First Step in Building World Class Information-Based Services Company

STAMFORD, CT, November 16, 2007 – Information Services Group, Inc. (ISG) (AMEX: III.U, III, III.WS) announced that it has completed its acquisition of TPI, the largest independent sourcing advisory firm in the world, focusing on the design, implementation and management of sourcing strategies for major corporate and government clients. The transaction was approved by ISG stockholders on November 13, 2007.

With the completion of the acquisition, Michael P. Connors, Chairman and Chief Executive Officer of ISG, will take on the additional responsibilities of Chairman and CEO of TPI. Ed Glotzbach, previously President and Chief Executive Officer of TPI, will join ISG as Vice Chairman. In his new role, Glotzbach will report directly to Connors and assist ISG with the transition and future expansion of the company.

“This is an exciting and historic day for ISG,” said Connors. “TPI is the clear market leader in a major global industry. TPI provides the right platform for us as we execute our strategy to build ISG into a premier global information-based services company. Ed Glotzbach has been a great partner throughout the past several months and I welcome him and the entire TPI team to ISG.”

About Information Services Group, Inc.

Information Services Group, Inc. (ISG) was founded in 2006 to build an industry-leading, highgrowth, information-based services company by acquiring and growing businesses in advisory, data, business and media information services. In November 2007, the company acquired TPI, the largest independent sourcing advisory firm in the world. Based in Stamford, Conn., ISG has a proven leadership team with global experience in information-based services and a track record of creating significant value for shareowners, clients and employees. For more, visit www.informationsg.com.

About TPI

TPI, a unit of Information Services Group, Inc. (ISG), is the founder and innovator of the sourcing advisory industry, and the largest sourcing advisory firm in the world. We are expert at a broad range of business support functions and related research methodologies. Utilizing deep functional domain expertise and extensive practical experience, TPI’s accomplished industry experts collaborate with organizations to help them advance their business operations through the best combination of outsourcing, offshoring, shared services and internal service optimization. For additional information, visit www.tpi.net.