Senior / Principal Offensive Security Consultant £100k

Senior / Principal Offensive Security Consultant £100k

Location: Hybrid (2 days per month in London)Salary: £80,000 - £100,000 + benefits

Are you a Senior Offensive Security Consultant or Principal Penetration Tester ready to take the next step into Red Teaming and Adversarial Simulation This is your opportunity to join an agile, rapidly growing UK cyber security consultancy where you can own and shape an entire offensive service line, build advanced infrastructure, and contribute to research and tooling that truly make an impact.

About the Role

As a Senior / Principal Offensive Consultant, you'll lead complex technical engagements that go beyond standard penetration testing - focusing on advanced exploitative infrastructure testing, Active Directory compromise, and assumed breach assessments.

You'll work directly with clients to scope, plan, and deliver high-impact projects, while helping to expand the organisation's Red Team and adversarial simulation services.

Key Responsibilities:

• Lead and deliver high-level infrastructure and Active Directory penetration testing engagements.
• Conduct advanced exploitative testing, lateral movement analysis, and privilege escalation within real-world environments.
• Support presales activity - crafting scopes, proposals, and technical solutions aligned with client objectives.
• Build and maintain strong, trusted client relationships, acting as a technical authority and strategic partner.
• Develop and enhance Red Teaming, assumed breach, and adversary simulation services.
• Contribute to tooling, infrastructure, and research initiatives - including whitepapers, presentations, and thought leadership.
• Mentor junior consultants, helping grow the internal capability and knowledge base.

About You

You'll be an experienced Penetration Testing Consultant / Offensive Security Professional who combines strong technical capability with commercial awareness and client empathy. You'll thrive on pushing boundaries, building new services, and seeing your work directly shape business growth.

Essential Skills & Experience:

• Proven background in offensive security consulting or senior penetration testing ( with particular emphasis on infrastructure and Active Directory).
• Deep understanding of exploit development, privilege escalation, and lateral movement techniques.
• Experience with adversarial simulation, assumed breach, or Red Teaming (or a strong interest in progressing into this space).
• Strong client-facing, presales, and scoping experience.
• Excellent written and verbal communication - capable of translating complex findings into actionable business advice.
• Desire to contribute to tool development, research, and technical innovation.

Why Join?

This is more than just another cyber security job - it's a genuine opportunity to make your mark. You'll be joining a team that values technical excellence, creativity, and collaboration, where your ideas are heard and implemented.

• Be part of a dynamic, agile cyber consultancy with a clear technical vision.
• Shape and own a new offensive service line and see it grow under your leadership.
• Work on cutting-edge adversarial simulation and Red Team engagements.
• Collaborate on research, tooling, and whitepapers that influence the industry.
• 2 days per month in London for strategy sessions and team building.
• Competitive salary: £80,000 - £100,000 + benefits.

If you're an experienced Offensive Security Consultant, Senior Penetration Tester, or Red Team Operator looking for a role where you can drive innovation, lead engagements, and build something exceptional, we'd love to hear from you.

Apply now to take ownership of your next challenge and shape the future of offensive security. Email if you don't want to upload your CV to the job board.

Circle Recruitment is acting as an Employment Agency in relation to this vacancy. Earn yourself a referral bonus if you refer somebody else who fills the role! We also offer an iPad if you refer a new client to us and we recruit for them. Follow us on Facebook - Circle Recruitment , Twitter - @Circle_Rec and LinkedIn - Circle Recruitment.