April 9 (Reuters) - Castellum AB:: *CASTELLUM PREPARES FOR CEO SUCCESSION *CEO JOACIM SJÖBERG HAS INFORMED CHAIR OF BOARD OF CASTELLUM THAT HE WISHES TO STEP DOWN FROM HIS POSITION AS CEO IN 2026 *JOACIM SJÖBERG WILL REMAIN EMPLOYED BY CASTELLUM UNTIL 31 DECEMBER 2026 *JOACIM SJÖBERG TO LEAVE POSITION ONCE NEW CEO TAKES OFFICE *JOACIM SJÖBERG WILL LEAVE HIS POSITION AS PRESIDENT AND CEO OF CASTELLUM ONCE A NEW CEO HAS TAKEN OFFICE *WILL NOW INITIATE A PROCESS FOR RECRUITMENT OF JOACIM SJÖBERG'S SUCCESSOR