Permanent
23 July 2026 11:59pm
Senior Security Engineer (Fixed & Core Network Security)
Job Summary
As a Senior Security Engineer (Fixed & Core Network Security), you are an expert in Telecommunications, Transport & IP, Automation, Infrastructure as Code, DoSP, and/or Cyber Security. You apply your expertise in security technologies, standards, and policies to design, implement, operate, and continuously improve security capabilities across Telstra’s Service Provider and Core Network environments.
Working closely with Engineering, Operations, Architecture, Product, Cyber Security, and vendor teams, you embed security controls into network platforms, services, and change initiatives, ensuring risks are proactively identified, managed, and reduced. You contribute to security assurance, vulnerability management, compliance, automation, telemetry, and security uplift activities that strengthen the resilience of Telstra’s critical network infrastructure.
You play a key role in delivering Telstra’s security strategy and protecting the confidentiality, integrity, and availability of Telstra’s platforms, networks, applications, and services.
What we offer
Performance-related pay
Access to thousands of learning programs so you can level-up
Global presence across 22 countries; opportunities to work where we do business. Purchased annual leave scheme
Additional Telstra day off
Additional 30% off Telstra products and services
Toolkit provided (laptop + mobile phone + plan paid for)
What You’ll Do
Network, Product and Technology (NPT) - Security & Operations is responsible for Telstra's security and operations, protecting Telstra's assets and infrastructure.
Define and operationalise, in collaboration with key stakeholders, appropriate security controls across networks and cloud platforms to protect Telstra and customer information, systems, and network assets.
Provide security design and architecture assurance input for network solutions, with a particular focus on Telstra’s service provider, fixed and core network environments.
Provide input into the security strategy, standards and frameworks to ensure security controls and hygiene are built into network and cloud engineering designs and processes.
Work collaboratively with network engineering, operations, DevSecOps, and cyber security teams to ensure security requirements are understood and effectively implemented.
Authentically engage with the business and leverage customer feedback to initiate continuous improvements in security engineering and technology designs that are fit for purpose and meet customer requirements.
Foster a culture of continuous improvement and coaching by modelling Telstra and best practice security engineering standards and actively develop less experienced engineers through coaching, mentoring and collaboration.
Demonstrate strong written and verbal communication skills in promoting security awareness and / or network or technology issues to Leaders / stakeholders.
Deliver outcomes to a high standard by actively collaborating in security capability design, change implementation and support of platform, applications, services and product issues.
Significantly contribute to the design, build, installation, integration and maintenance of a variety of network technologies, platforms, applications, services, products and/or systems.
Document your work to ensure that business continuity, security and operational activity can seamlessly be supported and maintained by others.
Actively engage in enhancing and improving CI/CD capabilities (testing, automation) to reduce cycle time while retaining quality.
Ensure solutions are re-usable, scalable, reliable, manageable and operable and align with the Telstra technology strategic directions and meet any specific OKR’s.
Assess capability of vendor solutions and offerings to meet business requirements.
Take an active role in managing vendor performance and technology delivery to ensure that agreed technical functionality, time and cost outcomes are met.
About You
General knowledge and experience with security engineering related to Fixed, Transport & IP Networks, DoSP and/or DevSecOps.
Understanding of traditional Network and Cloud native security components (e.g., firewalls, proxies, WAF, identity and access managment, threat prevention, vulnerability management, secure external access, secrets management, PKI/RPKI, PAM, SIEM logging and monitoring, IDS/IPS, DoSP, Infrastructure As Code, Micro Segmentation, Zero Trust architecture etc.).
Technical skills across TCP/IP Routing, SDN and virtualised networking, Radio Access Networks, LINUX, Docker, Kubernetes or Application Security.
Ability to work with DevSecOps, Networks and Cloud Security teams on CI/CD and orchestration security for virtual and containerised network functions and applications.
Familiar with Agile tools and methodologies.
Familiar with Industry Security Frameworks, Standards and Guidelines including SOCI, CIS & NIST
Excellent interpersonal skills as you’ll be required to collaborate with other Network, Security and Cloud SMEs and coordinate with external groups for security engagements and integrations with external systems.
Team player, add to an already great team culture.
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 abilities 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 via the contact details found at www.telstra.com.au/careers/diversity-equity-and-inclusion/disability-employment.
