Title:  IT Systems & Infrastructure Engineer

About the role

L3Harris Trenchant is an elite global team of engineers and security researchers charged with building world-class computer security products. Trenchant’s expertise is the by-product of the L3Harris acquisition of two highly-regarded information security businesses – Azimuth Security and Linchpin Labs. United under Trenchant, we are a key component of L3Harris’ Intelligence & Cyber Division. We are a trusted, discrete partner furnishing security products, consultancy, training and integration services to allied security, defence, and law enforcement agencies.

As part of the Global IT Operations team, you’ll play a key role in strengthening and modernizing our core IT services across the region. You’ll work across systems, networks, cloud platforms, and automation tools to deliver secure, reliable, and high-quality services for a highly technical global workforce.

In this role, you’ll help improve operational maturity, enhance service quality, and foster a culture of continuous improvement and accountability. Joining during an exciting growth phase, you’ll contribute to stronger governance, greater trust, and a solid IT foundation as we expand our team and infrastructure.

You’ll support a talented global workforce of around 150 engineers and researchers and may act as the primary technical contact for your site or collaborate closely with peers in a shared-responsibility model.

What the role will involve

The responsibilities of your role will include the following:

• Design and implement secure network and application architectures for mission-critical systems.
• Assess security risks and provide expert guidance to engineering and SOC teams.
• Develop and enforce security policies, standards, and best practices.
• Evaluate and integrate new security technologies and tools.
• Oversee firewalls, IDS/IPS, antivirus, and SIEM systems to optimize protection.
• Lead incident response and resolution for complex security issues.
• Collaborate across teams to ensure systems are “secure by design” and meet compliance requirements.

What you’ll bring

To succeed in this role, you’ll need the following experience and skills:

• Proficient in Linux system administration, Juniper JunOS, Cisco IOS, pfSense firewalls, and VMware vSphere.
• Strong problem-solving and analytical skills.
• Hands-on experience with networking, containerization, and cloud platforms.
• Eligible to obtain a security clearance (current clearance highly regarded).
• Familiar with automation tools and security best practices.
• Excellent communication and organizational abilities.
• Bachelor’s degree in a relevant field and 5+ years of experience in systems, network, or infrastructure engineering.
• Experience supporting technical or engineering teams.

About L3Harris Australia

L3Harris Australia excels as a prime defence contractor, providing integrated tech solutions for over four decades. Specialising in technology that connects and shapes operations spanning multiple domains: space, air, land, sea, cyber and first responders. Today, we employ over 500 professionals in all major cities who understand the region’s unique requirements.

A few of our employee benefits are:

• An additional week of leave per annum plus the option to buy or sell up to 2 weeks additional annual leave.
• Salary continuance insurance (SCI pays 75% of your base salary and bonus for up to 2 years)
• Flexible working hours and patterns depending on location
• Discounted private health insurance
• Life & Total Permanent Disability Cover
• Novated Car Leasing
• Company supported professional development programs
• Retail Reward programs

Important to know

Due to the nature of our work many our roles require an Australian citizenship and will require the successful candidate to successfully apply and hold an Australian Defence Security Clearance and/or be assessed to work with ITAR information.  Please answer the pre-screening questions upon applying for this assessment.