Exhibit 99.4

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph W. Brown, certify that:

1. I have reviewed the Quarterly Report of MBIA Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”);

2. Based on my knowledge, this Quarterly Report of the Company does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this Quarterly Report;

3. Based on my knowledge, the financial statements, and other financial information included in this Quarterly Report, fairly present in all material respects the financial condition, results of operations and cash flows of the Company as of, and for, the periods presented in the Quarterly Report;

4. The Company’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the Company and have:

(a) designed such disclosure controls and procedures to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this Quarterly Report is being prepared;

(b) evaluated the effectiveness of the Company’s disclosure controls and procedures within 90 days prior to the filing date of this Quarterly Report (the “Evaluation Date”); and

(c) presented in this Quarterly Report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;

5. The Company’s other certifying officers and I have disclosed, based on our most recent evaluation, to the Company’s auditors and to the audit committee of the board of directors:

(a) all significant deficiencies in the design or operation of internal controls which could adversely affect the Company’s ability to record, process, summarize and report financial data and have identified for the Company’s auditors any material weaknesses in internal controls; and

(b) any fraud, whether or not material, that involves management or others who have a significant role in the Company’s internal controls; and

6. The Company’s other certifying officers and I have indicated in this Quarterly Report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

/S/    JOSEPH W. BROWN

Joseph W. Brown

Chief Executive Officer

May 14, 2003