Step Forward With Us

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

About the role

L3Harris in Melbourne is the base for our Enterprise Network Modernisation Program (ENMP) for Airservices Australia. In partnership with Airservices, L3Harris will lead a consortium to plan and design an integrated, enterprise system to support all telecommunications, radio communications, ADS-B surveillance and network services for the National Airways System, including support for civil aviation, and aviation rescue and firefighting services.

As an Information Security Systems Engineer at L3Harris Technologies, you will design, develop, and validate advanced network and system security architectures. Beyond daily operations, you will provide strategic leadership to ensure our mission-critical defense and commercial systems remain protected against evolving cyber threats. In this role, you will drive the assessment of emerging technologies, establish enterprise security standards, and act as the subject matter expert safeguarding our global cyber infrastructure.

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:

• Bachelor’s degree in computer science, Information Technology, Electronics & Communication, or a related engineering field.
• 6+ years of experience in Security Architecture or Security Engineering.
• Strong knowledge of security frameworks and hands-on experience with technologies such as IPSEC/SSL, Palo Alto Firewalls, SIEM, EDR, AAA, DNS Security, F5 Load Balancers, and IDS/IPS.
• Familiarity with SD-WAN concepts; experience with Cisco or Fortinet appliances is a plus.
• Proficiency in scripting, preferably with Python.
• Proven ability to develop security policies and perform architectural risk assessments.
• Industry certifications such as CISSP or CCIE Security are highly regarded.

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.

As an equal opportunities employer, L3Harris is committed to the equal treatment of all current and prospective employees and does not condone discrimination on the basis of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, or marriage and civil partnership.