Science Applications International (SAIC) 10-Q 2025 Q2 Quarterly report

Exhibit 32.1

SCIENCE APPLICATIONS INTERNATIONAL CORPORATION

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO

18 U.S.C SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Science Applications International Corporation (the “Company”) on Form 10-Q for the period ended August 2, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Toni Townes-Whitley, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

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: September 5, 2024

/s/ Toni Townes-Whitley

Toni Townes-Whitley

Chief Executive Officer