L1 Expert Security Engineer

Join us at Orange Business!

We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.

Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.

The Incident & Change Management Expert operates as an advanced technical layer between Service Desk/L1 and L2 SOC experts. The role focuses on mid-to-advanced technical triage, firewall and network security analysis, policy validation, and secure change implementation within customer environments. The objective is to improve SLA performance, reduce escalations, and enhance technical ownership across network security operations.

Key Responsibilities

• Perform advanced technical validation and analysis of firewall, VPN, proxy, and network security alerts.
• Analyze network traffic flows, NAT rules, routing behavior, and firewall policy impacts to determine root causes of security events.
• Own and resolve network security incidents end-to-end, including investigation, containment, and resolution.
• Troubleshoot firewall drops, IPS blocks, VPN tunnel failures, and routing issues impacting network security operations.
• Implement standard and pre-approved firewall rule changes following appropriate risk validation and change management procedures.
• Validate rollback procedures prior to change implementation to ensure safe recovery in case of failure.
• Perform post-change verification to confirm successful implementation and maintain service stability.
• Identify risky, unused, or redundant firewall rules and recommend rule optimization and policy improvements.
• Maintain structured and evidence-based documentation in ServiceNow for incidents, investigations, and change activities.
• Support audit, compliance, and governance requirements by providing technical evidence and documentation when required.
• Act as a technical escalation point for Level 1 engineers, supporting complex alerts, investigations, and troubleshooting activities.
• Mentor and guide Level 1 engineers during incident investigations, ensuring adherence to SOC procedures and investigation quality.
• Deliver knowledge-sharing sessions and technical workshops to strengthen Level 1 engineers’ capabilities and promote best practices.
• Contribute to the development and maintenance of SOC runbooks, knowledge base articles, and troubleshooting documentation.
• Identify and drive operational improvements, including monitoring optimization, alert quality enhancement, and workflow efficiency.
• Support innovation initiatives by proposing and contributing to projects that enhance SOC automation, efficiency, and security operations.

You bring passion, energy, taste for exploration and adaptability. You seek the opportunity to expand your knowledge and develop new skills.

• Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.
• Flexible Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).
• Professional Development: training programs and upskilling/re-skilling opportunities.
• Career Growth: Internal growth and mobility opportunities within Orange.
• Caring and Daring Culture: Health and well-being programs and benefits, diversity & inclusion initiatives, CSR and employee connect events.
• Reward Programs: Employee Referral Program, Change Maker Awards.

Regardless of your age, gender identity, race, ethnic origin, religion/belief, sexual orientation, marital status, neuroatypia, disability, veteran status or appearance, we encourage diversity within our teams because it is a strength for the collective and a vector of innovation. Orange Group is a disabled-friendly company and equal opportunity employer: don't hesitate to tell us about your specific needs.