We're partnering with a leading enterprise technology environment supporting large-scale, mission-critical infrastructure across Singapore. This is an opportunity to work on complex hybrid IT systems with strong governance, structured processes, and exposure to enterprise-grade operations. We are looking for a highly skilled Messaging Engineer to join a fast-paced enterprise infrastructure team supporting large-scale, mission-critical environments. This role is ideal for candidates with strong experience in Microsoft Exchange, Active Directory, infrastructure automation, and enterprise messaging operations across multi-site data centre environments. Key Responsibilities: • Manage and maintain Enterprise Microsoft Exchange & Active Directory environments • Support enterprise mail systems and Identity & Access services • Handle incident, change, configuration, vulnerability, patch, and backup management activities • Perform platform upgrades, migrations, maintenance, and optimization act...