The Skills I Need Are:

Strength in all three areas. Depth in offensive security and demonstrable AI agent-building are both non-negotiable.

Offensive security depth

• Around 7 years hands-on, including at least 4 delivering client-facing engagements.
• Network testing: external and internal, Active Directory attack paths, privilege escalation, lateral movement, post-exploitation.
• Web and API testing: the OWASP Top 10 and, more importantly, what it misses, meaning business logic flaws, authentication and session weaknesses, and multi-step chains.
• Red teaming: objective-based operations covering initial access, command and control, EDR evasion, and purple-team work, against a client actively trying to catch you.
• Excellent written English, with redacted reports or a willingness to sit a writing exercise. The report is the product.

Agentic AI capability, the differentiator

• The part we care most about, and the part candidates most often overstate. We want evidence of building, not of using.
• You have shipped a non-trivial LLM agent: something that plans, calls real tools, handles errors, and finishes a multi-step task unsupervised. A private repository or a work project you can describe in detail counts.
• You are fluent with tool calling, structured output, the Model Context Protocol, and at least one agent framework or SDK (LangGraph, CrewAI, the OpenAI or Claude Agent SDKs, PydanticAI, or a hand-rolled loop). We are framework-agnostic and interested in your reasoning.
• You can describe an evaluation harness you built: the dataset, the scoring, how you caught regressions, and how you handled the fact that the same input does not give the same output twice.
• You are honest about the limits and can say with examples which parts of a test agents do well, badly, or should not attempt at all.

Software engineering and disposition

• Strong Python, the working language of this role. Go, Rust, or TypeScript is useful.
• Version control, code review, tests, CI/CD, containerisation, infrastructure as code, one major cloud. This runs unattended against client estates, so build it like production software.
• Genuine enthusiasm for automating a craft you spent years mastering, and the honesty to say when it is not good enough yet.
• Comfortable with ambiguity and with distributed, written-first working. Much of this role is deciding what to build next.

Preferred Qualifications

• Consultancy, MSSP, or managed service experience.
• Exposure to commercial autonomous or continuous testing platforms (XBOW, Horizon3.ai NodeZero, Pentera) as a user, evaluator, or competitor.
• Open-source contributions to offensive or agent tooling, published research, conference talks (DEF CON, Black Hat, BSides, AI Village), or a CVE record.
• Detection engineering experience, or familiarity with CREST, PCI DSS, CBEST/TIBER-EU, or DORA threat-led testing.

I Know I Have Done A Great Job If:

• Delivering high-quality network, web, API, cloud and red-team engagements that provide clear, actionable outcomes for clients.
• Building agentic systems that can safely complete defined stages of offensive testing with increasing levels of autonomy.
• Proving that the automation works through robust evaluation, testing and measurement of accuracy, coverage, reliability, cost and time saved.
• Convert successful automation into a repeatable, scalable, multi-tenant managed service with clear service levels and commercial value.
• Creating a clear understanding of where automation can be trusted, where human expertise is required and where an agent should not be used.
• Embedding appropriate safeguards, including scope validation, authorisation controls, kill switches, prohibited-action lists and complete audit trails.
• Raising the technical quality bar across the team and sharing your expertise in both offensive security and production-grade software engineering.
• Ultimately, you will have helped Quorum Cyber deliver continuous assurance at a scale that traditional penetration testing alone cannot achieve.

Other Information:

You will get an excellent salary, with world class benefits.

As leading-edge technology company you will have access to the latest technology, and an environment that will encourage and nurture your curiosity. We are passionate about your development, and you will be empowered to advance your skills and expertise.

Our Commitment to Equality & Diversity:

"Our diversity is a huge part of our success, and collecting data during the hiring process helps us understand how to keep strengthening and supporting that diversity."

We are an equal opportunity employer. We are committed to fostering an inclusive, accessible, and equitable workplace where all qualified applicants receive fair consideration. We do not discriminate on the basis of race, national or ethnic origin, colour, religion, age, sex, sexual orientation, gender identity or expression, marital status, family status, disability, or any other characteristic protected under applicable federal, provincial, or territorial human rights legislation.

The information requested below is collected to help us meet our employment equity and reporting obligations, and to support our ongoing diversity and inclusion initiatives. Providing this information is entirely voluntary. It will not be shared with hiring managers and will not be used in any hiring decision. Declining to provide this information will not affect your application in any way.