[Hiring] Client Security Lead @Theos Cyber Solutions Ltd.

Role Description

The Client Security Lead (CSL) is the named technical security owner for a defined set of client accounts and is accountable for the effectiveness and continuous improvement of the MTDR service delivered to those clients. The CSL is the two-way technical interface between the client and Theos Defence, representing the client within the SOC and ensuring analysts understand the client's environment, technology, business context, and security priorities.

• Be the client’s security champion.
• Bridge the gap between the client and the SOC.
• Run real, hypothesis-driven threat hunts.
• Convert Threat Intel into detections.
• Kill the noise (Own Detection Quality).
• Spot the non-detection flaws.
• Get hands-on during real incidents.
• Support cyber response operations.
• Level up the analysts.

Qualifications

• Detection Engineering
• Incident Analysis & Threat Hunting
• Cloud & Identity Security
• Client & Stakeholder Capability

Requirements

• Experience with major SIEM/XDR platforms, especially Microsoft Sentinel or CrowdStrike Falcon.
• Ability to write non-trivial detection logic independently.
• Experience in threat hunting or incident response.
• Working knowledge of at least one major cloud/identity ecosystem (Microsoft Azure, Entra ID, M335, or AWS).
• Comfortable communicating with senior leadership and technical teams.
• Ability to write professional documentation for clients.

Benefits

• Opportunity to work with leading technologies and expertise.
• Continuous development of skills and knowledge.
• Supportive team environment focused on innovation.