Lionbridge Technologies (LIOX)

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2009, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: May 8, 2009

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Date: March 13, 2009

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: November 10, 2008

35

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Date: November 10, 2008

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: August 11, 2008

1

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Donald M. Muir, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: November 9, 2007

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: August 9, 2007

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 10, 2007

1

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: March 16, 2007

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: November 9, 2006

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quartely Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: August 9, 2006

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: May 10, 2006

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: March 16, 2006

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quartely Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending September 30, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: November 9, 2005

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending August 8, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: August 5, 2005

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: May 9, 2005

1

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Lionbridge Technologies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2004, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Rory J. Cowan, Chief Executive Officer of the Company, and Stephen J. Lifshatz, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to our knowledge, that:

Dated: February 28, 2005