Security Engineering Senior Engineer - Firewall Security

Employment Type

Permanent

Closing Date

9 June 2026 11:59pm

Job Title

Security Engineering Senior Engineer - Firewall Security

Job Summary

Job Description

You’ll work hands-on in a fast-paced Agile environment alongside engineering and DevOps teams to assess and reduce risk across our platforms. This role blends technical depth with strategic influence — ideal for someone who thrives on solving complex challenges and improving security at scale. 

 As a trusted advisor, you'll contribute to secure design and implementation while helping uplift security practices and shape Telstra’s overall security capability.

Our Perks & Benefits:

• Work-life integration - we understand life happens when you're busy making other plans, so we offer flexibility around where, and when you work

• 16 weeks paid parental leave for primary and secondary carers

• Professional development program

• An epic (free) Telstra mobile phone plan

• Laptop/Device allowance renewed every 2 years

• Purchased Annual Leave scheme

• Discounted Telstra products and services

What You’ll Do

• Partner with engineering and platform teams to embed security into solution design and delivery lifecycles. 

• Lead the implementation of security controls within cloud, DevOps, and network environments. 

• Provide technical consulting and design input across security and network platforms. 

• Support deployments and changes — including some flexibility for after-hours work as required. 

• Operate as a subject matter expert, working autonomously and collaboratively within an Agile team. 

• Contribute to the evaluation and integration of emerging technologies, tools, and best practices.

• Drive the adoption of automation and AI-enabled capabilities in network security engineering, leveraging scripting, APIs, and intelligent analytics to streamline operations, enhance threat detection, and improve delivery efficiency.

About You

You’re a seasoned Security Engineer or Network Security Specialist with experience supporting enterprise-scale environments. You’re technically strong, a great communicator, and enjoy working across teams to embed secure solutions. 

We’d love to see: 

• 5–8+ years of experience in network security, cloud security, or infrastructure security roles. 

• Strong experience with one or more major firewall platforms (e.g. Palo Alto, Cisco FTD, Juniper, Checkpoint). 

• Solid hands-on skills in routing & switching (e.g. OSPF, BGP, VLANs, port channels, VRFs). 

• Familiarity with cloud environments (e.g. AWS, Azure) and CI/CD or DevOps security practices. 

• Experience working in Agile environments and collaborating across multidisciplinary teams. 

• Degree in Computer Science, Engineering, or a related field (or equivalent experience). 

• Strong capability in driving automation and AI-enabled capabilities within network security engineering, leveraging scripting, APIs, and intelligent analytics to streamline operations, enhance threat detection, and improve delivery efficiency.

Nice to have (but not required): 

• Exposure to SR-MPLS or carrier-grade networking. 

• Certifications such as CISSP, CISM, CCNP Security, or similar. 

• Experience with automation tools (Terraform, Ansible) or scripting for security use cases. 

If this opportunity sounds like a perfect fit for you, we'd encourage you to apply!

Diversity is more than a policy – it’s how we thrive

We know diverse teams deliver better outcomes, and we’re committed to creating an environment where everyone feels safe, respected, and supported — regardless of gender, background, or ability.

We strongly encourage women and gender-diverse people to apply and are happy to discuss flexible working arrangements or adjustments to the recruitment process.

We're amongst the top 2% of companies globally in the CDP Global Climate Change Index 2023, being awarded an 'A' rating. If you want to work for a company that cares about sustainability, we want to hear from you.

As part of your application with Telstra, you may receive communications from us on +61 440 135 548 (for job applications in Australia) and +1 (623) 400-7726 (for job applications in the Philippines and India).

When you join our team, you become part of a welcoming and inclusive community where everyone is respected, valued and celebrated. We actively seek individuals from various backgrounds, ethnicities, genders and disabilities because we know that diversity not only strengthens our team but also enriches our work. We have zero tolerance for harassment of any kind, and we prioritise creating a workplace culture where everyone is safe and can thrive. 

As part of the hiring process, all identified candidates will undergo a background check, and the results will play a role in the final decision regarding your application.

We work flexibly at Telstra. Talk to us about what flexibility means to you. When you apply, you can share your pronouns and / or any reasonable adjustments needed to take part equitably during the recruitment process.

We are aware of current limitations with our website accessibility and are working towards improving this. Should you experience any issues accessing information or the application form, and require this in an alternate format, please contact our Talent Acquisition team on [email protected] or via the additional contact options found at www.telstra.com.au/careers/diversity-equity-and-inclusion/disability-employment.