secunet Security Networks Aktiengesellschaft announced that Marc-Julian Siewert to become new Chairman of the Management Board from July 1, 2025. He is also the designated successor to the CEO. Marc-Julian Siewert possesses long-standing experience in business with public authorities as CEO of the provider for identity solutions Veridos, a joint venture of Giesecke+Devrient and Bundesdruckerei group.