Exhibit 32.3
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with Amendment No. 1 on Form 10-K/A to the Annual Report on Form 10-K of Emergent BioSolutions Inc. (the “Company”) for the period ended December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Fuad El-Hibri, President and Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, 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. |
Date: March 28, 2007 | /s/Fuad El-Hibri |
Fuad El-Hibri
President and Chief Executive Officer
(Principal Executive Officer)
