Penetration Tester

Employment TypePermanent

Closing Date8 Sept 2025 11:59pm

Job TitlePenetration Tester

Job Summary

As a Security Testing-Senior Specialist, you have a passion for security and ethical hacking and are equally motivated to build Telstra’s awareness and understanding of security policies, standards and procedures. You thrive on building a deep understanding of how best to protect the organisation's data whilst making innovative recommendations for changes and improvements. Your expertise in vulnerability assessment and penetration testing is critical to identifying and resolving security weaknesses that pose a risk to Telstra and our customers.Job Description

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 make your mark?

We’re building a team as diverse as the country we protect. Don’t worry if you don’t tick every box if you’re passionate, curious, and eager to grow, we want to hear from you.

Apply today and help secure Australia—one vulnerability at a time

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
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.
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