Senior IT Systems EngineerHybrid / Dublin-based roleSalary:€70,000 – €75,000 per annum plus an excellent benefits package includedApplicants must be eligible to work in Ireland – Irish, EU, Stamp 4, or Spouse Visa holders only.We are currently recruiting for aSenior IT Systems Engineerto join the IT team of a leading multinational SaaS company headquartered in Dublin. Reporting to the IT Manager, this role involves managing demanding IT infrastructure and security needs while supporting both Cloud and on-prem environments.This is an excellent opportunity to broaden your technical skills and make an active contribution as the company transitions its IT Infrastructure from on-premise to Cloud.Core Responsibilities:Provide world-class infrastructure support:Respond to complex helpdesk queries from technical engineersEnsure cost-effective and efficient use of IT infrastructure while identifying improvementsLiaise with hardware/software vendorsEnsure proper configuration of cloud security measures such as IAM, firewalls, and encryptionAdminister operating systems (Windows, Apple), virtual environments (VMware), and cloud platforms (AWS, Azure)Participate in creating and enforcing best practices, guidelines, and proceduresConduct security checks and maintain operational securityAnalyse and resolve faults – from system crashes to expired service accountsManage and deploy email, anti-spam, and virus protectionMonitor all user accounts and endpoint devices using cloud-based toolsCollaborate with cross-functional teams including network engineers, developers, and security professionalsInstall, support, and maintain new server hardware and infrastructure (Azure)Develop, deploy, and maintain security systems (firewalls, IDS/IPS, encryption, authentication)Maintain secure access for development environmentsContinuously monitor network activity for security threatsManage endpoint protection and DLP solutionsImplement and manage perimeter security (firewalls, VPNs, access control)Evaluate and deploy additional security tools and technologies (SIEM, IDS/IPS, endpoint protection)Skills Required:Advanced knowledge of Microsoft technologies: Active Directory, GPO, Windows OS, Exchange, SQL ServerStrong understanding of IT security, networking protocols (TCP/IP), firewall/VPN configuration, malware and virus protectionAdvanced technical knowledge of Microsoft Cloud Technologies (Azure, Entra ID, Intune, O365, Defender, SharePoint, Teams, BYOD)Advanced knowledge of Palo Alto on-prem and cloud firewalls - MustExperience managing Apple MacBook devices with MDM systemsStrong analytical, problem-solving, and communication skillsAbility to work independently and manage multiple prioritiesExperience with Linux systems, databases, or firewalls (advantage)Azure DevOps experience and automation knowledge (advantage)SaaS industry experience (advantage)Experience managing Email Gateway and Email Protection systemsEagerness to learn, adapt, and share knowledgeEducation & Experience:6–10 years' IT Systems Engineer experience (exceptional candidates with less will be considered)Third-level degree or equivalent experienceAdvanced Palo Alto / Prisma Firewall management experience & certification - MustAdvanced Microsoft Azure / Office 365 management experience & certificationExperience planning, deploying, and maintaining Microsoft Suite technologiesIf you're an experienced IT Systems Engineer looking to work in a dynamic, innovative SaaS environment — we'd love to hear from you