IT@JH Enterprise Directory and Messaging is seeking a Sr. Systems Engineer who is responsible for administering and maintaining the institution’s enterprise email infrastructure, including the JH Email Gateway (Cisco IronPort), the Sympa ListServ bulkmail distribution service, and the Microsoft Exchange environment. This role supports all users with a Johns Hopkins mailbox-faculty, staff, students, clinical and administrative departments, and affiliated organizations that rely on the enterprise messaging platform. The position works primarily with Windows based systems, with some Linux components, and manages both ticket based and project-based assignments, including security tasks, system maintenance, on-call support, and cross departmental work with groups such as