L3 EDR/XDR Security Engineer

About Atos Group
Atos Group is a global leader in digital transformation with c. 56,000 employees and annual revenue of c. €7.2 billion (at the go-forward perimeter), operating in 54 countries under two brands - Atos for services and Eviden for products and systems. European number one in cybersecurity and a leader in cloud, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos Group is the brand under which Atos SE (Societas Europaea) operates. Atos SE listed on Euronext Paris
The purpose of Atos Group is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space
We are looking for an experienced L3 EDR/XDR Security Engineer with expertise in:

• SentinelOne
• Cortex XDR
• Trend Micro Vision One / Apex One

Key Responsibilities:
Manage and support enterprise EDR/XDR platforms including SentinelOne, Cortex XDR, and Trend Micro Vision One/Apex One.
Perform advanced malware analysis, threat hunting, and incident investigations.
Utilize AI-driven analytics and behavioral detection for proactive threat identification.
Develop and tune detection rules, policies, and behavioral analytics.
Lead incident response activities including containment, eradication, and recovery.
Analyze endpoint telemetry, process execution, registry changes, memory indicators, and network connections.
Integrate EDR platforms with SIEM, SOAR, Threat Intelligence, and AI-based security tools.
Perform root cause analysis for security incidents and recommend remediation steps.
Design and implement EDR/XDR security architecture and best practices.
Support MITRE ATT&CK mapping and detection coverage analysis.
Automate repetitive SOC and IR tasks using APIs, scripts, AI workflows, and orchestration tools.
Conduct proactive threat hunting using AI-assisted analytics and anomaly detection.
Collaborate with SOC, Infrastructure, Cloud, and Security teams.
Prepare SOPs, KB articles, and technical documentation.
Mentor L1/L2 analysts and support skill development initiatives.
AI & Advanced Security Responsibilities:
Work with AI-powered threat detection and automated investigation workflows.
Validate AI-generated detections and reduce false positives.
Understand risks related to Agentic AI, AI misuse, and AI-driven attack techniques.
Support AI security posture management and AI governance initiatives.
Perform analysis on AI-assisted phishing, deepfake, and behavioral attacks.
Participate in AI red teaming and security validation exercises.
Support automation using SOAR, GenAI-assisted investigations, and intelligent alert correlation
Required Skills:

• Strong hands-on EDR/XDR experience
• Knowledge of AI-assisted security operations
• Experience with Splunk, QRadar, Sentinel, or Elastic
• PowerShell/Python scripting & automation
• IOC, YARA, Sigma & threat intelligence knowledge
• Understanding of ransomware & fileless attacks
• SOAR integration and automated response workflows
• SOC experience will be an added advantage

Preferred Certifications:
SentinelOne Certified Administrator/Engineer
Palo Alto Cortex XDR Certifications
Trend Micro Certified Professional
AI Security or Cloud Security Certifications
Security+ or equivalentExpected Responsibilities at L3:
Lead complex security investigations
Enhance detection, automation & AI-driven operations
Reduce false positives through advanced tuning
Provide EDR/XDR architecture recommendations
Support security governance & compliance
Strengthen AI security posture and resilience
Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all
Atos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment
Choose your future. Choose Atos.