Red Team Operator Cyber Security

Client Server Ltd.; Greater London; Hybrid; GBP 70,000 - 80,000; Full time

Benefits offered by this job

Continuous training

Certifications paid

Career progression

Job summary

Client Server Ltd. in London is seeking a Red Team Operator to conduct approved adversary simulations, red team and breach engagements for a range of clients.

You will scope objectives, plan and execute realistic operations within established rules of engagement and build red team infrastructure with custom tooling. You will work across Windows, Linux, networks, cloud and identity environments with a strong focus on OPSEC, stealth and detection risk, while mentoring others and contributing to

Qualifications

• Extensive Red Team / Offensive Security experience and up-to-date tradecraft.
• Advanced problem solving and critical thinking skills.
• Strong understanding of OSI model, networks, OS, authentication, endpoint controls.
• Ability to read code and develop scripts for red team objectives.
• Appreciation of OPSEC, detection risk, logging, and controlled engagement.

Responsibilities

• Perform approved adversary simulations, red team and breach engagements for clients, scoping objectives and threat scenarios.
• Plan and execute realistic operations within rules of engagement.
• Build and manage red team infrastructure and develop tooling.
• Research emerging TTPs and adapt approaches when standard tooling is unsuitable.
• Operate across Windows, Linux, networks, cloud and enterprise identity environments, focusing on OPSEC and stealth.
• Document operations, timelines and contribute to client deliverables; mentor junior team members.

Skills

Red Team / Offensive Security

Problem Solving

Networking & OSI concepts

Scripting & tooling

Code reading

OPSEC & security considerations

Communication & mentoring

Education

Technical degree from a top-tier university (e.g., Russell Group, Oxbridge)

Job description

London, Greater London | £70k - £80k per year

Opportunity to progress your career at a rapidly scaling technology company that provides a fully managed IT service including security.

As a Red Team Operator you'll be conducting approved adversary simulation, red team and assumed breach engagements for a range of clients. You'll work with clients to scope objectives and threat scenarios, then plan and execute realistic operations within agreed rules of engagement.

The role combines hands-on offensive security with research, problem solving and operational tradecraft. You'll build and manage red team infrastructure, develop custom tooling, research emerging TTPs and adapt your approach when conventional techniques aren't effective.

You'll operate across Windows, Linux, networks, cloud and enterprise identity environments, with a strong focus on OPSEC, stealth, detection risk and controlled execution.

You'll use a broad range of industry standard, open source, commercial and in-house tooling across reconnaissance, web application testing, initial access, command and control, Active Directory, cloud and identity testing. You'll also modify existing tools or develop lightweight scripts and capabilities where standard tooling is unsuitable. Training will be provided on the organisation's in-house platform.

Beyond technical execution, you'll document operations and timelines thoroughly, contribute to client deliverables and support client facing debriefs. You'll work closely with engagement leads, technical teams and client stakeholders, while helping less experienced team members develop their skills through coaching and mentoring.

Location / WFH:

You can work from home, collaborating colleagues remotely but must be commutable to London every 2-3 weeks.

About you:

• You have strong experience in a similar Red Team / Offensive Security role and keep up to date with emerging adversary tradecraft, tooling and TTPs relevant to red team operations
• You have advanced problem solving and critical thinking skills
• You have a strong understanding of low level technical concepts: operating systems, networking, authentication protocols, endpoint controls, identity platforms and the OSI model
• You can read and understand code, identify security weaknesses and develop scripts or tooling to support red team objectives
• You understand that red team operations are not only about achieving technical compromise, but doing so in a controlled, realistic and professional manner, you're able to consider OPSEC, detection risk, logging, payload exposure, infrastructure management, attack path selection and the wider impact of your actions during an engagement
• You have excellent communication and collaboration skills and are comfortable sharing knowledge and mentoring others in the team
• You have a relevant technical degree form a top tier university (e.g. Russel Group, Oxbridge)

What's in it for you:

• Salary to £80k
• Continuous training and career development including paid for certifications
• Excellent career progression as the company scales