L3 Systems Engineer (Systems, Networking & Security)

About the Role As a Level 3 Systems Engineer, you will serve as a senior technical escalation point while playing a key role in infrastructure and security project delivery. You will take ownership of complex technical incidents, perform advanced troubleshooting and root-cause analysis, and design, configure and deploy solutions across cloud and on-premises environments. Working alongside senior engineers, project managers and technical leadership, you will help strengthen escalation capability, support project delivery and provide technical guidance to Level 1 and Level 2 engineers. About the Client You will be working with a growing Australian managed services and technology provider supporting organisations across commercial, government, education, healthcare, not-for-profit and community sectors. The business delivers cloud and on-premises infrastructure, managed IT support, cybersecurity and compliance, networking, communications, and specialist technology solutions. It maintains a strong focus on security, high-quality documentation and dependable service delivery. Ideal Profile Background & Experience Demonstrated Level 3 or senior systems engineering experience within an MSP or complex, multi-site IT environment. Advanced troubleshooting expertise across Microsoft 365, Windows, cloud and on-premises infrastructure. Strong knowledge of Microsoft cloud technologies, security, identity, endpoint and access management. Solid experience with servers, virtualisation, networking, firewalls and infrastructure deployments. Proven ability to own complex incidents, identify root causes and determine effective resolutions or escalation paths. Experience contributing to or delivering infrastructure and technology projects from configuration through deployment. Strong understanding of cybersecurity and compliance-focused environments. Familiarity with the Australian Essential Eight is strongly preferred; exposure to ISO-aligned, DISP, SOCI or comparable environments is highly regarded. MSP experience is preferred, although candidates from sophisticated internal IT environments may also be considered. Exposure to VMware, SD-WAN, Starlink, remote-community networks, IoT, cameras, alarms or building systems is advantageous. Experience with PSA, RMM and knowledge-management platforms is desirable. Strong technical fundamentals with the ability to quickly learn new technologies and vendor platforms. Systems & Tools Microsoft 365, including Intune, Purview, Defender for Endpoint and Defender for Cloud. Microsoft Azure and Entra ID. SharePoint and Microsoft Teams.

Google Workspace. EasyDMARC, ConnectSecure and ThreatLocker. Blackpoint Cyber SOC/MDR and Keeper Password Manager. Exclaimer, Phriendly Phishing, Inforcer and AdminDroid. Datadog. Datto Autotask PSA, Datto RMM and Datto SaaS Protection. Hyper-V and VMware. 3CX voice systems and Adobe products. Hardware & Infrastructure Fortinet firewalls and associated security products. Ubiquiti networking, wireless, routing, security and camera solutions. Ruckus Wi-Fi and D-Link networking technologies. Lenovo, Dell, Apple, HP, ASUS and other endpoint hardware. Datto BCDR backup solutions. Professional Skills Ability to work autonomously while collaborating effectively with senior engineers, project managers and wider technical teams. Strong written and verbal communication skills. High standards of technical documentation and knowledge sharing. Responsibilities Act as a senior escalation point for complex, high-impact and persistent technical incidents. Lead advanced troubleshooting and root-cause analysis across Microsoft 365, Microsoft security, identity, endpoints, cloud and on-premises infrastructure. Design, build, configure and deploy infrastructure and security solutions for technology projects. Support server, virtualisation, networking, firewall, SD-WAN, remote-site and security uplift initiatives.