Senior L3 Security Support Engineer

About the role

The Senior L3 Security Support Engineer will join Orange Business’s global security services team, providing second‑level support and operational management for a portfolio of security solutions delivered to customers worldwide.

Key responsibilities

• Support and operate security services, handling incident, change, release, capacity and vulnerability management.
• Resolve service incidents by troubleshooting faults and performing root‑cause analysis.
• Assess risk and implement service changes, upgrades, patches and migrations.
• Monitor intrusion sensor alarms, differentiate real from false alerts and investigate application‑level traffic.
• Escalate major security events to senior engineers and manage technical escalations.
• Perform routine actions to optimise IPS security policies and maintain configuration management.
• Handle customer calls, provide regular updates and follow support processes.
• Mentor newcomers and SOC staff, offering guidance and technical advice.

Required profile

• B.Sc. degree in Computer Science, Communications or Electronics Engineering.
• At least 3 years of professional experience, with a minimum of 2 years in IT/Network security.
• Strong knowledge of security concepts, incident handling and vulnerability management.
• Relevant certifications (see required skills).

Required skills

• CCSE
• CCSA
• SSCP
• NSE4
• JNCIS-FW
• NSE5
• PCNSE
• CCNP
• CCSP
• CCNA Security
• CISSP