Network Security Engineer

il y a 2 semaines


Guyancourt, Île-de-France OneSource Consulting Temps plein

Job Title: Network & Security Engineer

Duration: 220 Days

Start Date: 24 November 2025

Languages: French (Preferred)

Location: Guyancourt – France

Working Mode: Hybrid (3 days per week on-site)

Sector:
Engineering

Profile

Position:
Network & Security Engineering (Experienced)

Languages Required:
English (CONFIRMED)

Mandatory Skills:

  • English (CONFIRMED)
  • Build reseaux & security (CONFIRMED)
  • Ansible, Python (CONFIRMED)

Description

General Information

A common IT production platform bringing together several entities in the financial sector. On January 1, 2019, more than 1,500 employees from the IT production activities of several entities pooled their skills within a new common house.

Objective:

To meet the challenges of the digital revolution, in order to strengthen the group's competitive position.

Our Ambitions:

  • Develop new platforms adapted to digital practices.
  • Guarantee a high level of security and confidentiality.
  • Become a leading technological hub in Europe, attractive to employees, new talents, and technological partners
  • If you have a taste for a challenge and want to become a player in the digital transformation, join us

Job Description

The cluster concerned constitutes the entry point for all infrastructure and production issues related to investment banking activities. This model integrates a global approach with the various regional hubs.

The
Network & Security Build Engineering
team is responsible for implementing new solutions and/or major changes to network & security infrastructures on a global scale.

Requirements:

  • Proven experience in collaborating with various profiles (project managers, architects, application engineers, etc.).
  • Ability to communicate and popularize the elements to be implemented from a network & security point of view.
  • Coordinate with the various interlocutors in French and English.

Technical Experience:

  • "Switched" and "routed" environments.
  • Mastery of protocols:
    STP, BGP, OSPF, MPLS.
  • Proven competence on security equipment such as
    proxy, F5, firewalls.
  • Proactive approach in optimizing working time by automating network tasks via tools such as
    Ansible, Python.

Skills & Experience

Minimum Education Level:
Bac + 5 / M2 and above

Specialization:
IT

Minimum Experience:
3 years

Experience Requirements:

A minimum of 3 years of experience in
network & security build
is required.

Experience with the following methods/new technologies is appreciated:
Ansible, DevOps, CI/CD
, etc.

Technical Skills Sought:

  • Network Technologies:
    Cisco, Fortinet, Juniper, Checkpoint, McAfee, Arista
    , etc.
  • Protocols:
    BGP, OSPF, ACI, ACL, MPLS
    , etc.
  • Security Cross-functional and general culture.

Professional Skills:

  • Network & Security Engineering
  • Basic knowledge of technical architectures (system, storage, middleware)
  • Modelling/writing of technical architectures (HLD/LLD)


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