Systems Administrator

COMPANY OVERVIEW  ThreatLocker® is a global cybersecurity company providing enterprise-level endpoint protection solutions that help organizations secure their servers, workstations, and critical infrastructure. The ThreatLocker® platform includes Application Allowlisting, Ringfencing™, Storage Control, Elevation Control, Endpoint Network Control, Configuration Management, and Operational Alert solutions, enabling organizations to adopt a Zero Trust approach that blocks malicious activity before it can execute.  As part of our continued growth across Europe, we are seeking a Systems Administrator to join our team in Dublin, Ireland.  POSITION OVERVIEW  ThreatLocker is seeking an experienced Systems Administrator to join our IT Infrastructure team. This is an in-office position based in Dublin and is responsible for maintaining, securing, and improving the company's internal infrastructure.  The successful candidate will have extensive experience administering Microsoft Windows Server environments, Hyper-V virtualization, Microsoft SQL Server, Active Directory, and enterprise networking. Experience supporting Linux servers and modern DevOps technologies is desirable but not essential.  This role requires an individual who enjoys solving complex technical problems, can work independently, and is committed to maintaining a highly available, secure, and scalable infrastructure.  KEY RESPONSIBILITIES  The Systems Administrator will be responsible for, but not limited to:  Administering and maintaining Windows Server environments.  Managing Active Directory, Group Policy, DNS, DHCP, and related Microsoft infrastructure services.  Administering and maintaining Hyper-V virtualization infrastructure.  Installing, configuring, maintaining, and troubleshooting Microsoft SQL Server environments.  Managing enterprise storage, backup, and disaster recovery solutions.  Monitoring infrastructure performance, availability, and capacity.  Installing, configuring, and maintaining network infrastructure, including switches, firewalls, wireless networks, VLANs, VPNs, and routing.  Troubleshooting server, storage, networking, virtualization, and operating system issues.  Planning and implementing infrastructure upgrades and system improvements.  Applying operating system updates, firmware updates, and security patches.  Implementing and maintaining cybersecurity best practices across the server and network environment.  Creating and maintaining technical documentation, network diagrams, and standard operating procedures.  Supporting office infrastructure and assisting with IT projects across multiple international locations.  Working closely with internal engineering, development, and security teams to ensure reliable and secure infrastructure.  Learn&nb...