Corero Network Security plc announced that Lionel Chmilewsky, the Company's Chief Executive Officer has resigned to pursue other opportunities. Mr. Chmilewsky will remain with the Company until 31 May 2023 in order to ensure an orderly handover but will resign from his position on the Board on 28 February 2023. The Company will initiate a search process for a new Chief Executive Officer to lead the Company in its next phase of growth and will provide an update in due course.