Jobs
My ads
My job alerts
Sign in
Find a job Career Tips Companies
Find

Infrastructure systems administrator

Sydney
Amentum
System Administrator
Posted: 1 May
Offer description

Role description

Seeking an NV2 cleared Infrastructure Systems Administrator, you will play a critical role in ensuring the stability, security and performance of the Fleet Battle Lab System. You will work across Windows, Linux, virtualisation and network environments, supporting highly available, secure infrastructure in line with Defence cyber standards.

Responsibilities

* Responsible for the stability, security, efficiency, and scalability of the Fleet Battle Lab System;
* Administer and maintain Windows Server (2022) and Red Hat Enterprise Linux 8 systems.
* Manage Active Directory, Group Policy, DNS, DHCP, and system security/hardening.
* Configure, support, and optimise Hyper‐V and VMware virtualization environments.
* Manage Veeam Backup & Replication, including testing and disaster recovery planning.
* Configure, monitor, and troubleshoot Cisco switches/routers and FortiGate firewalls.
* Support LAN, WAN and VPN infrastructure with a focus on uptime and security.
* Assist with the integration of simulation systems using simulation architecture;
* Ensure that systems are maintained in accordance with current cyber standards;
* Monitor system and network performance, applying patches, updates, and hotfixes.
* Automate administration tasks using PowerShell and Bash scripting.
* Provide Tier 2/3 support, troubleshoot incidents, and document solutions.
* Collaborate with vendors and key stakeholders on incidents, issues, resolutions, and ongoing support, following change management processes.
* Maintain and update documentation for all operational and new ICT systems, services, and processes to support effective management.
* Contribute to a collaborative, high‐performing team culture, supporting cohesion and operational excellence.

Essential requirements

* Minimum 5 years' experience in systems administration within medium to large IT environments
* Tertiary qualifications in IT, or equivalent industry certifications, such as Microsoft Certified: Windows Server Administrator, RHCSA / RHCE, VMware Certified Professional (VCP), Cisco CCNA / CCNP, Fortinet NSE (4 or higher), Veeam Certified Engineer (VMCE), CompTIA Security+ or Network+
* Strong experience administering Windows Server and/or Linux (RHEL) systems
* Hands on experience with Hyper V, VMware and Veeam Backup & Replication
* Strong knowledge of Active Directory, DNS, DHCP and Group Policy
* Proven experience with Cisco networking and FortiGate firewalls, including VLANs, routing, VPNs and multicast
* Solid understanding of networking concepts: TCP/IP, routing, switching and VPNs
* NV2 Active clearance Certificate IV, Diploma, Graduate Certificate or Graduate Diploma in an IT discipline; or
* Industry certifications such as:
* Microsoft Certified: Windows Server Administrator
* Red Hat Certified System Administrator (RHCSA) or Engineer (RHCE)
* VMware Certified Professional (VCP)
* Cisco CCNA/CCNP
* Fortinet NSE certification (NSE 4 or higher)
* Veeam Certified Engineer (VMCE)
* CompTIA Security+ or Network+

Desirable

* Ex serving Defence member with an IT or Combat Systems Operations background
* Exposure to C4I systems such as Link 16 or GCCS and strong proficiency in PowerShell and Bash for automation and system management

Security clearance level

NV2

Location

Navy Fleet Battle Labs, Garden Island Sydney, NSW. In location support is required to support integrated team operations. Flexibility of Working from home, dependant on tasking requirements.

Weekly hours

Monday-Friday, 40 hours per week

Compensation

The compensation range or hourly rate listed for this position is provided as a good‐faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements and relevant laws.

Benefits Overview

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

* Health, dental, and vision insurance
* Paid time off and holidays
* Retirement benefits (including 401(k) matching)
* Educational reimbursement
* Parental leave
* Employee stock purchase plan
* Tax‐saving options
* Disability and life insurance
* Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara‐O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Equal Opportunity Employer

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, colour, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low‐income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law.

#J-18808-Ljbffr

Send an application
Create a job alert
Alert activated
Saved
Save
Similar job
Linux system administrator
Sydney
Whizdom
System Administrator
Similar job
System administrator – cloud & incident response (apac)
Sydney
Imagine Communications
System Administrator
Similar job
System administrator (hybrid)
Sydney
Imagine Communications
System Administrator
Similar jobs
IT and Tech jobs in Sydney
jobs Sydney
jobs New South Wales
Home > Jobs > IT and Tech jobs > System Administrator jobs > System Administrator jobs in Sydney > Infrastructure Systems Administrator

About Jobstralia

  • Career Advice
  • Company Reviews

Search for jobs

  • Jobs by job title
  • Jobs by sector
  • Jobs by company
  • Jobs by location

Contact / Partnership

  • Contact
  • Publish your job offers on Jobijoba

Legal notice - Terms of Service - Privacy Policy - Manage my cookies - Accessibility: Not compliant

© 2026 Jobstralia - All Rights Reserved

Send an application
Create a job alert
Alert activated
Saved
Save