Senior Red Team Security Consultant - CBEST, CCSAS

Senior Red Team Security Consultant - CBEST, CCSAS
Salary: £85,000 - £105,000 (Depending on Experience) + Bonus
Location: UK or Europe (Remote-First)
Travel: Occasional overseas travel required

Company Overview

This is an attractive opportunity for a Senior Red Team Security Consultant to join a prestigious and prominent cyber security organisation, home to some of the sharpest minds in the industry - absolute specialists in adversarial simulation, offensive security, and threat-driven testing.

The Role

We are specifically seeking someone with outstanding operational experience - a practitioner who excels in live operations, complex attack chains, stealthy execution, and delivering intelligence-led adversarial engagements at the highest level. In this senior position, you will conduct complex Red Team operations, adversary simulations, and intelligence-led threat exercises across enterprise environments.

Key Responsibilities

* Lead Red Team engagements, TIBER-EU and CBEST testing.
* Develop advanced threat scenarios and attack chains.
* Build offensive tooling, malware, implants, and C2 frameworks.
* Execute stealthy lateral movement, privilege escalation, EDR evasion.
* Operate across cloud and hybrid infrastructures.
* Provide consultancy, risk translation, and uplift strategies.
* Contribute to R&D projects, PoC tooling, exploit development.

About You - Required Skills & Experience

You will be an exceptional offensive security professional with outstanding proven operational-level experience in delivering complex Red Team and adversarial engagements. You must demonstrate a solid understanding of modern endpoint detection technologies and maintain a strong OPSEC-driven mindset - ensuring disciplined, stealthy execution throughout all stages of an engagement.

Expertise in:

* TIBER-EU, CBEST.
* Adversarial tradecraft, OPSEC, stealth ops.
* Active Directory exploitation, cloud attack paths.
* C, C++, C#, .NET, Python.
* C2 frameworks such as Cobalt Strike, Sliver, Mythic.

Required & Valued Certifications in at least one of the below please

* OSEP - Offensive Security Experienced Penetration Tester
* OSCE/OSCE³ - Offensive Security Certified Expert/Expert³
* OSEE - Offensive Security Exploit Expert
* OSCP - Offensive Security Certified Professional
* OSWE - Offensive Security Web Expert
* OSED - Offensive Security Exploit Developer
* CCSAS - Crest Certified Simulated Attack Specialist
* CRT - Crest Registered Penetration Tester
* CCT INF/CCT APP - Crest Certified Tester (Infrastructure/Applications)
* GPEN - GIAC Penetration Tester
* GXPN - GIAC Exploit Researcher & Advanced Penetration Tester
* CRTO - Certified Red Team Operator

Professional Attributes

Exceptional consulting capability, communication, analysis, collaboration, OPSEC discipline.

Security Requirements

Legal right to work in UK/EU. Must undergo background checks.

Key Responsibilities

* Lead Red Team engagements, TIBER-EU and CBEST testing.
* Develop advanced threat scenarios and attack chains.
* Build offensive tooling, malware, implants, and C2 frameworks.
* Execute stealthy lateral movement, privilege escalation, EDR evasion.
* Operate across cloud and hybrid infrastructures.
* Provide consultancy, risk translation, and uplift strategies.
* Contribute to R&D projects, PoC tooling, exploit development.

What We Offer

£85,000 - £105,000 + bonus, remote-first, occasional travel, elite team environment, R&D time

About Adecco
Adecco is acting as an Employment Agency. We are proud to be an equal opportunities employer. We are on the client's supplier list for this position.