Senior Penetration Tester

At Excelium, cybersecurity and national security are more than just our focus- it is at the heart of what we do. We are not traditional consultants, we are modern, adaptable, and effective professionals from diverse backgrounds, united by a shared commitment to excellence. Our high-performing teams are at the forefront of shaping regulatory frameworks, developing innovative solutions, and delivering exceptional services to government agencies, private enterprises, and critical infrastructure providers across Australia.

With our growing team of specialists, our mission is to counter complex cyber and national security threats, support maturity uplift and strengthen organisational resilience nationwide, in a way that is fit for purpose, practical and sustainable for the organisations we work with.

Our values - building strong relationships, valuing our people, achieving outstanding results, delivering value for money, upholding a solid reputation, and demonstrating honesty and integrity - underpin everything we do.

As a Senior Penetration Tester, you will play a pivotal role within the Security Operations team, leading advanced penetration testing engagements across diverse environments. You will work closely with internal and external stakeholders to ensure systems, applications, cloud platforms, and devices are thoroughly assessed against evolving cyber threats. We are seeking candidates with SFIA Level 4-5 experience who bring both technical depth and strategic insight to the role.

Key Responsibilities

• Lead, design, and coordinate comprehensive penetration testing engagements, including scoping, planning, and execution of tests across complex IT environments.
• Conduct advanced security assessments that leverage real-world attack simulations, uncovering high-risk vulnerabilities and potential exploit paths.
• Build and maintain strong partnerships with stakeholders, providing actionable advice and translating complex technical findings into clear, executive-level insights.
• Develop, maintain, and refine threat models to prioritise vulnerabilities and guide remediation efforts effectively.
• Innovate and enhance internal methodologies, creating new tools, frameworks, and processes to improve testing efficiency and effectiveness.
• Mentor and support team members, fostering a culture of collaboration, knowledge sharing, and continuous improvement.
• Contribute to broader cybersecurity initiatives, including vulnerability management, threat hunting, and incident response activities as required.

Experience & Skills

• Minimum five (5) years' experience in field of expertise
• Formal penetration testing training or recognised certifications.
• Demonstrated experience with or knowledge of PSPF, ISM and Essential Eight.
• Proven ability to lead complex technical discussions and influence decision-making among technical and non-technical stakeholders.
• Exceptional communication skills, including the ability to convey complex security concepts to senior leadership and diverse audiences.
• Strong problem-solving and analytical skills, with a proactive approach to identifying risks and recommending mitigation strategies.

PLEASE NOTE: Shortlisted applicants must be Canberra, ACT based and hold an active AGSVA Security Clearance of NV1 or above to be considered for this opportunity.

Why Join The Excelium Team?

Joining the Excelium team is not just about being part of something greater and making real-world impact - you'll also benefit from:

• Competitive remuneration based on experience
• Day one mentoring from some of the best Penetration Testers in the business
• A collaborative, no-ego culture that supports growth and celebrates success
• Opportunities to work on high-impact projects across private and government sectors
• Flexible work arrangements and ongoing support for professional development and certification.

Our Commitment to Diversity

Excelium is an equal opportunity employer and is committed to creating an inclusive workplace that values and celebrates diversity. We strongly encourage applications from Aboriginal and Torres Strait Islander people, veterans, individuals with disabilities, and people of all cultural backgrounds.

How to Apply

If you're ready to build/continue a thriving career in ICT and cybersecurity, and you meet the selection criteria outlined above- we'd love to hear from you

Please submit your resume along with a cover letter outlining your experience and explaining why you believe you're the ideal candidate for this position.

For a confidential discussion, please email your questions to let's talk