Red Team Operator

Overview

At Core Tech we have a rich pedigree of conducting world‑class security research across a multitude of platforms. Having established and delivered many successful projects in this area over the years, we are expanding into adjacent areas. We are hiring Red Team Operators at all levels of seniority to help grow and deliver a new service. You will be part of a long‑term offensive security capability with backing, a clear mandate, and a roadmap for growth.

Our Red Team will operate with a realistic adversary mindset, focusing on end‑to‑end attack simulation, stealth, and meaningful outcomes rather than checklist‑driven testing.

• Plan and execute full‑scope red team operations, simulating real‑world threat actors as well as honing your own tradecraft.
• Conduct red team engagements across:
  • Network infrastructure, cloud, and Active Directory environments
  • Web applications and APIs
  • Social engineering and phishing campaigns
• Configure and use C2 frameworks for command and control.
• Use network and endpoint detection (EDR) evasion techniques.
• Perform post‑exploitation activities including privilege escalation, lateral movement, persistence, and exfiltration.
• Develop and modify custom tooling, payloads, and infrastructure.
• Produce high‑quality reports that tell the story of the attack and drive remediation.

• Commercial experience of working on full‑scope engagements in a similar role as a Red Team Operator, including being able to lead engagements.
• Good understanding of networking, network technologies, DNS, routing, firewalls, IDS, IPS and common VPN solutions.
• Experience with regulatory‑driven engagements such as CBEST, TIBER, or GBEST.
• Linux server configuration experience.
• Experience using Infrastructure‑as‑Code to deploy infrastructure.
• Experience building and configuring an Active Directory environment (as a lab for example).
• Understanding of the common detection tools and services available to customers.
• Experience recommending relevant mitigations and detection techniques to customers.
• Ability to explain why an attack technique worked and how a customer can mitigate against it in future.
• Good knowledge of existing tools and techniques and how to customise them.
• Ability to customise existing code and write scripts without support.

Due to the sensitivity of the role, successful applicants must be British Citizens and be willing to undergo extensive background checks to obtain a security clearance. Ideally, applicants will already hold an active Developed Vetting security clearance.

• A relevant certification such as those offered by Offensive Security (OSEP, OSEE, OSWE), CREST (CCRTS, CCSAS, CCT), Cyber Scheme (CSTL, Red Team Manager) and SANS.

• Promotions are based on technical excellence and reviewed regularly.
• 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year.
• Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service.
• We offer financial support to cover HMRC allowable costs of relocating if you’re moving to the area.
• Training and development opportunities to support your career aspirations.
• O’Reilly books subscription which provides access to huge range of technical books.
• Regular events including internal technical conferences, company socials and pizza‑fuelled lunchtime seminars.
• Free seasonal fruit, tea, coffee, milk, squash and hot chocolate.

• Private online GP, and a helpline to speak with various healthcare professionals.
• Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain.
• Mental health – counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists.
• Annual Health assessment.

• A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date.
• 8% company contribution to pension with no minimum requirement for employee contribution.
• Death in Service cover of 4x base salary.

• Enhanced…