Security engineer

Colt Technology Services; Malakoff; Sur place; EUR 50 000 - 70 000; Plein temps

Résumé du poste

A telecommunications company in Île-de-France is seeking a Security Engineer to oversee the deployment and management of security technologies. This role is crucial for protecting both internal and customer-facing security services. Applicants should have 3-7 years of experience in security engineering, a solid grasp of network principles, and familiarity with security tools. Join us in creating intelligent solutions that empower customers globally.

Prestations

Opportunities for career growth

Empowering work environment

Diversity and inclusion initiatives

Qualifications

• 3–7 years of experience in security engineering and/or network engineering.
• Solid understanding of TCP/IP, routing, firewalls, VPN, and network segmentation principles.
• Hands-on experience with security tools such as firewalls, SIEM, IDS, IPS.
• Familiarity with Linux, scripting (Python, Bash), and infrastructure-as-code.
• Knowledge of secure configuration standards and common protocols.

Responsabilités

• Support deployment and integration of customer security products.
• Deploy and manage security technologies across telecom infrastructure.
• Monitor and analyze security events and alerts.
• Assist with vulnerability assessments and configuration hardening.
• Participate in security incident response and remediation efforts.

Connaissances

Cyber Security Architecture

IT Architecture Methodologies

Cyber Security Tools / Products

Cyber Security Planning

Security Compliance

Formation

Bachelor's or Master's degree in Computer Science

Outils

Firewalls (Fortinet, Palo Alto)

SIEM / SOAR

IDS / IPS

EDR

Vulnerability Scanners

Description du poste

Colt provides network, voice, and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure.

Why we need this role

This role is critical for protecting internal telecom infrastructure and customer-facing security services. It ensures the secure deployment and management of technologies across backbone, edge, and cloud environments, supporting the delivery and integration of managed security solutions for customers. The role plays a key part in incident response, vulnerability management, and maintaining security standards. By collaborating with engineering, operations, and product teams, it helps embed security into every layer of the network and service lifecycle, ensuring resilience, compliance, and customer trust.

What you will do

Security Product Engineering (Customer-Facing Focus)

• Support deployment and integration of customer security products such as managed firewalls, SD-WAN, SASE platforms, and DDoS mitigation solutions.
• Perform configuration, troubleshooting, and tuning of security services in customer environments.
• Assist in onboarding, proof-of-concept testing, and support transitions to operations for customer security services.
• Work with solution architects to operationalize and maintain secure design patterns and templates.

Infrastructure Security (Internal Focus)

• Deploy and manage security technologies across the telecom backbone, edge, and data centre infrastructure (e.g., firewalls, IDS / IPS, SIEM, PAM, NAC).
• Collaborate with network and systems teams to secure IP / MPLS transport, SDN platforms, automation tools, and cloud workloads.
• Monitor and analyze security events and alerts, responding to incidents and escalating as appropriate.
• Assist with vulnerability assessments, patch management validation, and configuration hardening.
• Document and maintain infrastructure security standards, configurations, and runbooks.

Support & Collaboration

• Participate in security incident response, root cause analysis, and remediation efforts.
• Provide input on threat modeling, security testing, and design reviews for internal and external services.
• Stay current on security threats, tooling, and telecom-relevant vulnerabilities.
• Collaborate cross-functionally with engineering, operations, product, and customer support teams.

What we're looking for

Must haves

• 3–7 years of experience in security engineering and/or network engineering.
• Solid understanding of TCP/IP, routing, firewalls, VPN, and network segmentation principles.
• Hands-on experience with security tools such as firewalls (Fortinet, Palo Alto, etc.), SIEM / SOAR, IDS / IPS, EDR, or vulnerability scanners.
• Familiarity with Linux, scripting (Python, Bash), and infrastructure-as-code concepts.
• Knowledge of secure configuration standards (e.g., CIS benchmarks) and common protocols (e.g., BGP, DNS, SNMP).

Might haves

• Experience supporting or delivering telecom or ISP infrastructure.
• Exposure to customer-facing security services or managed security environments.
• Familiarity with regulatory and industry standards (e.g., NIST, ISO 27001, UK TSA).
• Certifications such as Security+, GSEC, GCIA, or equivalent are a plus.
• Telecom or carrier experience strongly preferred.

Skills

Cyber Security Architecture, IT Architecture Methodologies, Cyber Security Tools / Products, Cyber Security Planning, Security Compliance

Education

A Bachelor's or Master's degree in Computer Science, Information Security, or a related field.

What we offer you

Looking to make a mark?

At Colt, you’ll make a difference. Because around here, we empower people. We don’t tell you what to do.

Instead, we employ people we trust, who come together across the globe to create intelligent solutions.

Our global teams are full of ambitious, driven people, all working towards one shared purpose: to put the power of the digital universe in the hands of our customers whenever, wherever, and however they want.

We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.

Diversity and inclusion

• Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, you’ll be encouraged to be yourself because we believe that’s what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.