Penetration Tester

Job Summary

Are you an Australian citizen based anywhere in Australia who wants your work to directly protect millions of Australians across families, communities, and critical services by strengthening the systems they rely on every day?

Curious, creative, and security-savvy? If so, read on.

We’re inviting applications from those who see a login screen and wonder what’s behind it (ethically, of course). If you thrive on solving complex problems, enjoy mentoring others, and love the idea of making systems stronger by testing their limits, this is the role for you.

You'll lead high-impact security assessments, shape future capabilities, and embed automation into our testing program—all while working flexibly in a team that supports you to do your best work, your way. You’ll be joining a supportive, experienced team that values knowledge-sharing, mentoring, and celebrating each other's wins.

What You’ll Be Doing

• Conducting white, grey, and black box penetration tests

• Reviewing source code to uncover hidden vulnerabilities

• Leading vulnerability assessments across systems and networks

• Driving automation and process improvements

• Mentoring team members and promoting secure coding practices

• Collaborating across teams to strengthen Telstra’s security posture

What You Bring

• 7+ years in security testing, including 3+ years in penetration testing and source code review

• Strong scripting and automation skills

• Experience with CI/CD pipelines and security tool integration

• Ability to communicate technical risks clearly to diverse stakeholders

• Industry certifications like OSCP, OSWE, CREST, CISSP, GPEN, or GWAPT are a plus

Why Telstra?

• Flexible work that works for you – remote-first, hybrid options, and genuine flexibility

• Support to grow – lead, learn, and take on new challenges with confidence

• Inclusive and collaborative culture – we value different perspectives, backgrounds, and ideas

• Purposeful work – help protect millions of Australians and build a safer digital future

• Tools that empower – access to cutting-edge tech, a smart team, and space to make an impact

Ready to test boundaries and build resilience?

We’re building a team that reflects the world we protect—diverse in background, united by purpose.

Not sure you meet every requirement? That’s okay. If you’re passionate about security, curious by nature, and keen to grow, we’d love to hear from you.

Apply now and help us secure the future one vulnerability at a time.