Offensive Security Consultant in Brisbane

About us

Mantel is an Australian-owned IT Professional Services consultancy, focused on emerging technology to help advance our clients by leveraging AI, Digital, Cloud, Data & Security technology. We are a fully AI-enabled technology consultancy and the partner that bridges the gap between blue-sky ambition and practical steps to deliver value. Since our inception in November 2017, we have experienced remarkable growth across Australia & New Zealand and are honoured to be recognised as a Great Place to Work for 7 years in a row! We hire smart and talented people and get out of their way. As a principle-based organisation, we have a flat structure with no hierarchy. By focusing on our five principles and not getting caught up in red tape, we trust you to get the job done!

Working in our growing cyber security capability allows you to work closely with clients across our teams. Our security capabilities span governance, risk and compliance, cyber engineering, and offensive security. We enable large-scale cyber security initiatives for our clients, and improve the protection of IT environments.

About the role

As an Offensive Security Consultant at Mantel, you will be an integral part of our cybersecurity team, helping to identify and mitigate security vulnerabilities for our clients. In this role, you will conduct penetration tests, analyse security gaps and work alongside experienced professionals to improve the security posture of client systems. This is an ideal role for a detail-oriented individual looking to develop their skills in ethical hacking and security assessment.

Your day to day

• Work on both large scale and targeted penetration testing projects for enterprise customers.
• Conduct penetration tests on client applications (web/mobile/desktop), networks and systems to identify vulnerabilities and weaknesses.
• Work on a mix of blackbox, greybox and whitebox source code assisted penetration tests.
• Perform vulnerability assessments using various tools and techniques, then document findings and suggest remediation actions.
• Contribute to detailed reports that summarise findings, prioritise risks, and provide actionable recommendations for improving security.
• Communicate findings to clients in both technical, and clear non-technical manners and work with them to understand security requirements and potential impacts.
• Provide offensive security experience and recommendations across a wide range of technologies and solutions, including conducting security reviews.
• Stay current with the latest vulnerabilities, exploits, and cybersecurity trends.
• Contribute to the team’s continuous improvement efforts by researching new tools and methodologies.

What you’ll need to be successful

• Experience running multiple types (network/web/mobile) of penetration tests for customers.
• Foundational understanding of networking, operating systems, and common web application security principles.
• Knowledge of penetration testing tools (e.g., Burp Suite, Metasploit, Nmap) is essential.
• Ability to review and understand application source code to identify security issues in business logic, authentication and authorisation, input handling, and data processing.
• Excellent written and verbal communication skills, with the ability to explain technical concepts to both technical and non-technical audiences.
• Strong analytical skills with a keen eye for identifying vulnerabilities and weaknesses in complex systems.

At Mantel, we want you to be yourself. We trust our team members to use their professional judgment while treating colleagues and clients with respect, compassion, and professionalism in alignment with our five principles. You take ownership, always stepping up to help and prioritising your teammates. You're also a clear, kind communicator who makes sound decisions based on good judgement.

Highly desirable skills:

• Experience in AI pen testing and using AI security tools.
• Ability to write code in modern programming languages.
• Ability to use coding skills during security testing, including writing scripts, tooling, and proof-of-concept code to support white-box and code-assisted penetration testing.

What you can expect from us:

• You’ll get all the tools you need to hit the ground running including a new phone, laptop & swag.
• We believe in unique experiences for all. Our My Deal program allows you to tailor your yearly plan, with the support of your Leader, to decide on what’s most important to you.
• Mantel is a certified Family Inclusive Workplace, which means we are committed to improving your wellbeing at work through leading practices on flexible work, parental leave, family care and family wellbeing.
• A true investment in your AI-first career. We are a fully AI-enabled consultancy and provide you with the tools to lead.
• You’ll be genuinely supported by an organisation that cares about not only you but your family as well.
• Mantel offers Flexible Personal Leave options for those unplanned moments in life.
• We support a flexible hybrid approach to working which is guided by our principles; we trust each other to “make good choices” about the best workplace locations for the requirements of the project, role and client.
• We know you won’t have one job for life. At Mantel, we believe in supporting our team to take their career in a direction that aligns with their passions.
• We value a diverse workplace and strongly encourage people from all backgrounds and minority groups to apply.