Senior Cybersecurity Analyst — Global Defender XDR Expert

Lightsource bp; Greater London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Lightsource bp is seeking a dynamic Senior Cybersecurity Analyst to monitor cyber risk and lead the remediation of identified vulnerabilities across our IT systems globally. You will be responsible for threat detection, investigation, and incident response, leveraging a modern security technology stack with a strong focus on the Microsoft Defender ecosystem.

Working across multiple business areas and time zones, you will proactively hunt for security issues, assess emerging threats, and partner

Qualifications

• 5+ years in cybersecurity with at least 2+ years in a SOC or incident response role.
• Advanced proficiency with Microsoft Defender XDR and expert-level knowledge of Microsoft Sentinel, including KQL query writing and analytics rule development.
• Strong hands-on experience with Microsoft Defender for Endpoint, including policy configuration and threat investigation.
• Demonstrable experience responding to cyber threats and working in an Azure-focused cloud environment.
• Proven experience with the Cyber Kill Chain, MITRE ATT&CK, and other security defence and intelligence frameworks.
• Experience in stakeholder management and engagement at C-Suite level.
• Experience working for Critical National Infrastructure (CNI) organizations is desirable.
• Knowledge of: Defender XDR, Tenable IO/Nessus, Defender EASM; Microsoft Purview; Entra ID; Intune; Cisco Meraki and Fortinet FortiGate; NIST 2.0, NIS2, NERC CIP, SOC2, IEC 62443 OT; ITIL; various security tools.
• Strong documentation and reporting skills for technical and executive audiences.

Responsibilities

• Continuously monitor the organization's security systems and infrastructure using SIEM, EDR, and related toolsets to detect signs of compromise and investigate security events to completion.
• Proactively conduct threat hunting using threat intelligence frameworks (MITRE ATT&CK, Cyber Kill Chain) and available security platforms to identify and mitigate emerging threats.
• Assess new and evolving cyber threats to the business, optimizing existing Defender technologies and other security solutions.
• Identify vulnerabilities in systems and applications; coordinate with Infrastructure, Digital Workplace, and Support teams to remediate.
• Manage core SecOps tooling platforms, ensuring configuration accuracy and good documentation.
• Communicate with stakeholders during investigations and escalations with clear updates to technical and non-technical audiences.
• Support development and enforcement of cloud security policies aligned with NIST 2.0, CIS, NIS2.

Skills

Threat detection

Incident response

Security operations

Microsoft Defender XDR

KQL queries

Azure security

Stakeholder management

Communication skills

Cross-functional teamwork

Education

Bachelor's degree in CS/InfoSec

AZ-500

CISSP

CCP

CompTIA Security+

GCIH

GCIA

Tools

Microsoft Defender XDR

Microsoft Defender for Endpoint

Microsoft Sentinel

Tenable IO

Nessus

Azure

Intune

Job description

Lightsource bp is seeking a dynamic Senior Cybersecurity Analyst to monitor cyber risk and lead the remediation of identified vulnerabilities across our IT systems globally. You will be responsible for threat detection, investigation, and incident response, leveraging a modern security technology stack with a strong focus on the Microsoft Defender ecosystem.

Working across multiple business areas and time zones, you will proactively hunt for security issues, assess emerging threats, and partner