Senior Systems Administrator (Level 3) – MSSP | Work from Home

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.

About the Role
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.

Key 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

Skills and Experience

• 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

• Exposure to MSSQL or Oracle is advantageous

About You
You are comfortable operating independently and taking full ownership of technical outcomes. You make decisions with confidence and accountability. You focus on doing things properly, not just quickly, and continuously look for ways to improve systems and processes. You are engaged, responsive, and operate as a senior member of the team in a remote environment.