Gioia Messinger

Director and Chair, Nominating and Governance Committee, One Stop Systems [email protected]

(760) 402-7703

April 12, 2025

Ken Potashner

Chair of the Board, One Stop Systems [email protected]

(858) 774-0419

cc: Dennis Doucette

Dear Ken,

I hereby resign from the Board of Directors of One Stop Systems, effective the date of the upcoming shareholder meeting. I do not intend to stand for reelection.

Sincerely,

Gioia Messinger