Penetration Testing & Offensive Security Engineer

nbn® Australia; Melbourne; Hybrid; AUD 110,000 - 170,000; Full time

Benefits offered by this job

Reconciliation Action Plan

Accessibility & Inclusion Plan

18 weeks of paid parental leave

WORK180 Endorsed Employer for Women

Job summary

nbn is seeking an Offensive Security Tester in Melbourne to strengthen Australia’s cyber security posture through penetration testing, threat simulation, and red/purple team engagements across diverse environments. You will plan, execute, and communicate testing outcomes, delivering clear, actionable insights to both technical and non-technical audiences.

The ideal candidate brings strong offensive security expertise, certifications (Offsec/HTB/SANS), and a collaborative, mentoring mindset to

Qualifications

• Experience in offensive security and security assessments.
• Ability to plan and communicate tests to a range of audiences.
• Experience with security frameworks, testing methodologies, automation.
• Mentor others and contribute to team growth.

Responsibilities

• Deliver offensive security and technical assurance activities across technologies and environments.
• Conduct penetration testing, threat simulations, red and purple team engagements.
• Perform security assessments and communicate findings to technical and non-technical stakeholders.
• Collaborate with stakeholders, vendors and teams to plan, execute and report results.
• Coach interns and graduate testers to build capability.

Skills

Penetration testing

Security assessment

Threat simulation

Stakeholder comms

Automation

Education

Offensive security certifications

Job description

nbn is seeking an Offensive Security Tester in Melbourne to strengthen Australia’s cyber security posture through penetration testing, threat simulation, and red/purple team engagements across diverse environments. You will plan, execute, and communicate testing outcomes, delivering clear, actionable insights to both technical and non-technical audiences.

The ideal candidate brings strong offensive security expertise, certifications (Offsec/HTB/SANS), and a collaborative, mentoring mindset to