Level 3 Systems Engineer - Sydney About the Role We are partnering with a growing managed services provider to hire a Level 3 Systems Engineer to join their high-performing Assist Team. This role will see you operating as a senior escalation point across complex infrastructure and security environments, while also playing a key role in technical leadership, automation, and continuous improvement initiatives. You'll work across a broad range of Microsoft, virtualisation, and network technologies, supporting enterprise clients while mentoring junior engineers and driving best practice across the team. Key Responsibilities Provide Level 3 support across systems, infrastructure, and network environments Troubleshoot and resolve complex incidents across Microsoft technologies (Windows Server, M365, Exchange, SharePoint, SQL) Support and manage virtualisation platforms (VMware, Hyper-V) Maintain and support Citrix environments (Virtual Apps, Desktops, Netscaler, WEM) Deliver network-level support across WAN/LAN, firewalls, routing, and connectivity Act as a senior escalation point for L1/L2 engineers and assist with critical incident resolution Communicate effectively with clients, providing updates, managing expectations, and ensuring service quality Key Skills & Experience Strong experience in a Level 3 Systems / Infrastructure Engineer role Deep expertise across Microsoft environments (Windows Server, M365, Azure) Experience with virtualisation (VMware, Hyper-V) and Citrix technologies Strong networking knowledge (WAN/LAN, firewalls, routing, security) Experience with endpoint management (Intune, Autopilot) Scripting/automation experience (PowerShell highly desirable) Exposure to security frameworks and tools (Defender, Secure Score, etc.) Proven experience in a managed services or client-facing environment Certifications (Desirable) Microsoft Certifications (AZ-104, MS-500, M365 Expert) Security certifications (Security, CISSP, CISM, etc.) Other relevant infrastructure or cloud certifications Ideal Candidate Profile Strong technical depth with a proactive and solutions-focused mindset Experience working in MSP or multi-client environments Comfortable mentoring others and leading technical initiatives Strong communication skills with the ability to engage with both technical and non-technical stakeholders Commercially aware with a focus on delivering high-quality outcomes