Senior Security Engineer - Mobile Network Security, Telstra

Telstra

Location:
Australia, Flexible

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

As a Senior Security Engineer in our GNT Business Unit, you'll apply your expertise in Telecommunications, Mobile Core and RAN technologies, Automation, Infrastructure as Code (IaC), and Cyber Security to strengthen the security of Telstra's mobile networks. You'll help design, integrate, and operate security capabilities across our Mobile Core, RAN, and orchestration systems using DevSecOps and Agile practices.

Job Responsibility:

Define and operationalise security controls across Mobile Core and RAN platforms
Embed secure-by-design principles into engineering standards and frameworks
Lead the design, integration, and support network technologies and platforms in line with Telstra's tech strategy
Enhance automation and CI/CD practices to improve delivery speed and quality
Engage with business and technical stakeholders to deliver practical, customer-focused security solutions
Provide technical leadership and mentoring to support team development
Evaluate vendor solutions and manage performance to ensure secure outcomes
Document work for continuity, knowledge sharing, and operational excellence
Participate in the on-call roster to support critical incident response

Requirements:

Broad understanding of Mobile Core, Radio Access Networks (RAN), and security engineering across Network, Telco Cloud, and DevSecOps environments
Strong technical expertise in TCP/IP routing, RAN, Linux, Docker, and Kubernetes
Hands-on experience securing modern infrastructure (e.g. Docker, Kubernetes, IaC with Terraform/CDK)
Experience delivering security capabilities via automation and CI/CD pipelines
Familiarity with Agile methodologies and tools
Knowledge of key security standards/frameworks (e.g. SOCI, NIST, GSMA, 3GPP)
Strong interpersonal skills with the ability to collaborate across teams and partners

Nice to have:

Experience with system hardening and best practice implementations
Experience deploying security capabilities through automation and CI/CD pipelines
Degree in Cyber Security, Cloud Security, Telecommunications, or Network Security — or equivalent industry experience
Relevant certifications such as CISSP, CCIE (Security), CompTIA Security+, or Cloud Security certifications (mandatory for cloud security-focused roles)

What we offer:

Competitive, performance-based pay
Access to thousands of learning programs to help you grow your skills
Purchased annual leave scheme
An additional Telstra day off each year
30% discount on Telstra products and services

Additional Information:

Job Posted:
August 28, 2025

Expiration:
September 11, 2025

Employment Type:

Fulltime

Work Type:

Remote work

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Senior Security Engineer - Mobile Network Security