Senior System Administrator

Employment Hero; Adelaide; On-site; AUD 100,000 - 140,000; Full time

Job summary

QuantX Labs in Adelaide is seeking a Senior Systems Administrator to strengthen IT across corporate and engineering environments. This hands-on role covers Linux servers, Microsoft 365, Entra ID, security controls and external vendors, with a focus on scalable, reliable IT practices.

Reporting to the Head of Operations, you will own day-to-day IT operations, contribute to infrastructure planning, and drive automation and security improvements while collaborating with engineers and product teams.

Qualifications

• Experience administering Linux environments.
• Experience administering Microsoft 365 and Entra ID.
• Experience supporting on-premises and cloud infrastructure.
• Experience across identity and access management, endpoints and security controls.
• Strong troubleshooting and problem-solving skills.

Responsibilities

• Administering and maintaining Linux-based servers, systems and services.
• Managing Microsoft 365 services including Entra ID, Exchange Online, SharePoint, Teams, Intune and Defender.
• Coordinating IT support, infrastructure activities and projects delivered through external MSPs and technology vendors.
• Maintaining system documentation, procedures and configuration records.
• Supporting cyber security controls and ongoing improvements to the security of the environment.

Skills

Linux admin

Microsoft 365

Entra ID

Identity management

Security controls

Troubleshooting

Tools

Azure AD

SharePoint

Exchange Online

Job description

AI Job Summary

• Hands-on experience administering Linux-based servers, systems and services.
• Experience administering Microsoft 365 services including Entra ID, Exchange Online, SharePoint, Teams, Intune and/orDef
• Experience with identity/access management, endpoint administration and security controls.

Role Type

Permanent, Full-time, Mid-level Senior

Description

Adelaide | Permanent Full-time | Growth-Focused Deep-Tech Business

QuantX Labs is an emerging Australian deep-tech company developing advanced technologies across the Space, Defence and Commercial sectors. We are growing quickly, working on complex programs and building the systems, capability and infrastructure needed to support our next phase.

As we continue to grow, we're creating a new Senior Systems Administrator role to strengthen our internal technology capability across both our corporate and engineering environments.

This is a broad, hands-on role for someone who likes being close to the technology. You'll work across infrastructure, systems, security, Microsoft 365, Linux environments and external technology providers, while helping us build more scalable and reliable IT practices as the business grows.

Reporting to the Head of Operations and working closely with our Engineering function, you'll play an important role in supporting day-to-day technology operations while also contributing to infrastructure planning, systems improvement and future capability requirements.

The Opportunity

You will be responsible for the day-to-day administration, reliability and security of our IT environment, including:

• Administering and maintaining Linux-based servers, systems and services.
• Managing Microsoft 365 services including Entra ID, Exchange Online, SharePoint, Teams, Intune and Defender.
• Supporting on-premises and cloud-hosted infrastructure.
• Managing user identities, permissions, access controls and endpoint administration.
• Troubleshooting systems, applications, infrastructure and end-user technology issues.
• Supporting backup, recovery, patching, monitoring and lifecycle management.
• Coordinating IT support, infrastructure activities and projects delivered through external MSPs and technology vendors.
• Supporting software deployment, licensing, device provisioning and asset management.
• Maintaining system documentation, procedures and configuration records.
• Supporting cyber security controls and ongoing improvements to the security of the environment.
• Identifying opportunities to automate, simplify and improve IT systems and processes.

About You

You will be an experienced, practical systems and infrastructure professional who is comfortable working independently and taking ownership of issues through to resolution.

You will bring:

• Strong hands-on experience administering Linux environments.
• Experience administering Microsoft 365 and Entra ID.
• Experience supporting on-premises and cloud infrastructure.
• Experience across identity and access management, endpoints and security controls.
• Strong technical troubleshooting and problem-solving skills.
• Experience working with Managed Service Providers, vendors or specialist technology partners.
• Strong communication skills and the ability to work effectively with both technical and non-technical stakeholders.
• The ability to prioritise competing requirements and operate effectively in a growing, fast-moving environment.

Experience supporting engineering, product development or technology environments will be highly regarded, as will experience in Defence, Space or other security-sensitive environments.

Relevant qualifications in IT, Computer Science, Information Systems or a related discipline are desirable, although strong equivalent industry experience will also be considered. Relevant Microsoft, Linux, cloud, cyber security or IT service-management certifications would be advantageous.

Why QuantX Labs?

At QuantX Labs, you will be part of a growing Australian technology company working on challenging, high-impact problems across Space, Defence and advanced technology.

What makes this opportunity different is the combination of technical complexity, autonomy and influence. You will work directly with highly capable engineers and technical specialists, with the opportunity to shape how our IT environment evolves as the company grows.

You can expect:

• Meaningful work - supporting technologies and capabilities that contribute to Australia's sovereign capability.
• Real ownership - this is not a narrow support role; you will have visibility across the environment and the opportunity to influence how it develops.
• Interesting technical challenges - working across corporate and engineering systems in a complex, fast-moving technology environment.
• A high-calibre team - working alongside experienced engineers, scientists and technical specialists.
• The opportunity to build and improve - helping establish scalable systems, processes and controls rather than simply maintaining what already exists.
• A growing organisation - where your contribution is visible and there is genuine scope to shape how things are done.
• A collaborative environment - with direct access to decision-makers and the ability to work across teams without unnecessary layers.

If you are someone who enjoys solving problems, improving systems and taking ownership in a technically challenging environment, we would like to hear from you.

Company Overview

QuantX Labs is a privately-owned, highly respected Australian company and a world-leader in high-precision timing and quantum sensor technologies. We are providing a unique, sovereign industrial capability to support Australian Defence and Space programs in phased array radar, surveillance and intelligence, quantum technology and alternate PNT networks.