Junior Network Security Operator (m/f)

BDO in Luxembourg is looking for an Junior Network Security Operator (mf/)!

Who are we?

BDO is present in over 166 countries, and we offer an extensive range of services in the areas of Audit, Tax, Advisory, Accounting, Business Services and Outsourcing.

At BDO Luxembourg, our mission is to provide our clients with our expertise of our global network tailored to the unique needs of the Luxembourgish market, delivering personalized service and building valued relationships.

With over 650 people representing more than 40 nationalities, we embrace diversity and encourage skill development and ownership among our team members.

Our core values, honesty, integrity, quality, respect, and responsibility define our culture. Hence, our People can expect to grow in a stimulating work environment that nurtures professional development and fosters inclusivity.

What will you do?
The role purpose is to support day-to-day operations of network security controls (perimeter, remote access, and cloud network security) by implementing approved changes, maintaining security platforms, and assisting troubleshooting.

Perimeter Security & Firewalls

• Implement approved changes on firewalls (rules, NAT, objects) under change management.

• Support firewall hygiene activities (rule review support, cleanup, basic validation and post-change checks).

• Assist with troubleshooting perimeter security issues and escalate to senior engineers when required.

  Remote Access & VPN

• Support remote access services (e.g., GlobalProtect) and troubleshoot common user connectivity issues.

• Support site-to-site VPN operations (tunnel monitoring, basic troubleshooting, change implementation).

  Web Application Firewall

• Support WAF operations (policy updates, logging checks, troubleshooting) in coordination with application owners.

  Cloud Network Security

• Support cloud networking/security operations (e.g., Azure networking constructs and Azure firewall policies) under established standards and change control.

  Vulnerability & Hardening Follow-up

• Support vulnerability scanning operations coordination (scope validation, scheduling, basic troubleshooting).

• Track and support remediation actions for network/security findings (patch/firmware updates planning support, retest coordination, validation of fixes).

This offer is for you if:

• Early-career professional in network/security operations, infrastructure support, ideally with 1–3 years' experience in an enterprise environment, or relevant internships/apprenticeships.

• Comfortable working in a ticket-driven environment

• Active team player, with good communication skills, able to coordinate issues resolution with other team members and escalate clearly and promptly.

• Proactive and reliable: takes ownership of assigned tasks, follows through, and contributes to continuous improvement.

• Professional fluency in French and English.

Technical Skills (Required / Preferred)

Required

• Fundamentals of networking (TCP/IP, routing basics, DNS, HTTP/S).

• Basic understanding of firewall/VPN concepts (rule bases, NAT, authentication, least privilege).

• Operational discipline: change execution, rollback awareness, evidence-based troubleshooting.

Nice to Have

• Exposure to multiple firewall technologies, SSL VPN, PKI/certificates, WAF, and vulnerability management.

• Familiarity with the Microsoft security ecosystem (e.g., Defender / M365), ITIL best practices, and common security standards (e.g., ISO 27001, NIST) will be appreciated.

What is waiting for you:

• 13th month + performance bonus + pension plan

• Car leasing scheme, mobility budget

• Lunch vouchers

• Extra days of annual leave

• Flexible hours & homeworking

• Parking access

• Canteen on site

• Free access to our fitness room

• Career development opportunities & continuous learning and development through a wide range of trainings on technical and soft skills

• Company mobile phone and laptop

• Action Teams eligible to participate (e.g. football) and classes (spinning, yoga, pilates, etc)

Are you willing to grow your career in a multicultural, pleasant and dynamic environment? Then, take your chance!

--

In accordance with the provisions of the Luxembourg law of 23 July 2016 amending the law of 29 March 2013, candidates may be required to provide an extract from their criminal record. This document, issued by the authorities, must not be older than three months. Such a document will be requested with the aim of carrying out a character check on candidates, bearing in mind the area of activity of our establishment and, more particularly, the tasks described in the job description.