Senior Systems Admin – MSSP (L3) | AU | WFH

Staff Domain

2d • Remote

About The Position

We are a boutique Managed Security Service Provider focused on delivering secure, well-architected environments for mid to enterprise clients. We operate with a strong engineering mindset, high standards, and a clear direction toward AI-driven operations and automation. We are seeking a Senior Systems Administrator to take ownership of complex environments and operate with a high degree of autonomy within a modern, AI-first service model. You will act as the senior escalation point across L2/L3, responsible for resolving complex issues and maintaining high-performing, secure environments. You will own technical outcomes across your assigned environments, make decisions independently, and drive improvements without relying on constant direction. The role is hands-on, with a focus on stability, optimisation, and long-term quality. You will also gain exposure to AI-driven tooling and automation as part of our evolving service delivery model.

Requirements

• Proven experience in a senior systems administrator or equivalent role
• Experience managing complex network environments or working within an MSP or MSSP
• Strong expertise across Microsoft technologies including Active Directory, Azure AD, Microsoft 365, and Windows Server
• Advanced networking capability across routing, switching, firewalls, VPN, wireless, and SD-WAN
• Experience with virtualisation platforms including VMware vSphere and Hyper-V
• Strong understanding of cybersecurity principles and operational practices
• Hands-on experience with Azure and AWS environments
• Experience with backup platforms such as Veeam and Metallic

Nice To Haves

• Exposure to MSSQL or Oracle is advantageous

Responsibilities

• Own and resolve complex technical issues end-to-end
• Take full technical ownership of assigned client environments
• Provide escalation support and guidance to junior engineers
• Maintain and optimise Microsoft, cloud, and network infrastructure
• Drive improvements in security, performance, and standardisation
• Contribute to automation and AI-driven operational enhancements
• Assist with delivery of infrastructure and security projects as required

Benefits

• HMO, Dental, and Life Insurance for you and one free dependent from day one (with option to enroll more)
• Paid Leaves: Birthday, Vacation, Medical, and Maternity (up to 6 Vacation Leaves convertible to cash on your anniversary)
• Employee Engagement Activities: Year-End Party, Family Day, Team Building, and more

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed