Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G Amendment No. 1 dated February 12, 2025 relating to the Common stock, no par value per share, of CRA International, Inc. shall be filed on behalf of the undersigned.

PERTENTO PARTNERS LLP

By: /s/ Eduardo Marques

Name: Eduardo Marques

Title:   Managing Partner

EDUARDO MARQUES

By: /s/ Eduardo Marques