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Keystone Solutions

Network Security Engineer

Keystone Solutions
Belgium · Full-time · Not Applicable
Mission Overview:

Join Keystone Solutions as a Senior Network Security Engineer consultant to deliver critical network protection and security engineering for our client. In this consultancy mission, you will operate on-site and/or in hybrid setups with the client, performing all responsibilities below as a Keystone Solutions consultant while collaborating closely with client stakeholders.

Key Responsibilities:

  • Design and implement network security measures:
    • Develop and deploy security strategies to protect networks against cyberattacks and unauthorized access.
    • Configure and maintain firewalls, VPNs, and other security devices.
  • Monitor and manage network performance:
    • Continuously monitor networks to detect and respond to security incidents.
    • Perform regular security audits and vulnerability assessments.
  • Troubleshooting and technical support:
    • Diagnose and resolve network security issues.
    • Provide advanced technical support and collaborate with other teams to resolve incidents.


General Competencies:

  • Communication: Ability to explain complex technical concepts clearly and understandably to non-technical audiences.
  • Problem-solving: Aptitude to analyze and quickly resolve network security issues.
  • Leadership: Ability to lead and mentor teams, sharing knowledge and coaching junior members.
  • Adaptability: Flexibility to adapt to new technologies and the rapid changes in cybersecurity.
  • Time management: Skilled at managing multiple tasks and projects while meeting deadlines and priorities.


Technical Competencies:

  • Network Management and Routing: Understanding of core network management principles, including configuration and administration of routers and switches. Knowledge of routing protocols and concepts such as dynamic routing, static routing, and inter-domain routing. This also includes ExpressRoute, ISP connectivity, WiFi networks, DNS solutions, and TACACS.
  • Network Security: Expertise in implementing and managing firewalls, VPN solutions, Proxy (forward and reverse), and Load Balancers.
  • Cloud Security and Secure Access: Understanding of securing cloud environments, including protecting data in transit and at rest, and securing access. Mastery of the ZTNA concept.
  • Security Incident Management: Ability to detect and respond to security incidents, analyze threats, and address vulnerabilities.
  • Automation and Scripting: Skills in automating network tasks to improve operational efficiency using common scripting languages.
  • Operating Systems Knowledge: Familiarity with operating systems used in network environments.
  • Security Standards and Protocols: Knowledge of network security standards and cryptographic protocols to secure communications.


Certifications:

  • Continuous Training and Certifications (optional but beneficial): Commitment to continuous learning and obtaining professional certifications in network management and security.


Behavioral Competencies:

  • Ability to Adapt and Learn Quickly: Rapidly assimilate existing applications and processes; adapt to new environments and technologies.
  • Effective Communication: Communicate clearly with technical and non-technical teams; explain complex concepts in an understandable way.
  • Collaboration and Teamwork: Work collaboratively with diverse teams, including Business, development, and support teams.
  • Problem-Solving: Identify and analyze technical issues; propose creative and pragmatic solutions.
  • Time and Priority Management: Manage time and priorities effectively to meet project deadlines and objectives.
  • Results Orientation: Focus on achieving outcomes, with strong motivation to drive projects to completion.
  • Attention to Detail: Maintain strong attention to detail during requirements analysis, development, testing, and documentation.
  • Stress Management and Flexibility: Manage stress effectively and remain flexible when facing changes and unexpected challenges.
  • Autonomy: Work autonomously while reporting to the domain lead.
  • Sensitivity to New Technologies: Be curious and open to new technologies and industry evolution.


Language Requirements:

  • French or Dutch: excellent
  • Second language (French or Dutch): good
  • English: good


Consultancy Model at Keystone Solutions:

  • You will work as a Keystone Solutions consultant embedded within the client environment, on-site and/or hybrid, delivering value while aligning with Keystone?s quality standards and governance.
  • You will collaborate closely with client stakeholders while benefiting from Keystone?s community of experts, tools, and support.


Dynamic Projects:

  • Opportunity to tackle diverse challenges across client initiatives, from network hardening and incident response to cloud access security and advanced automation.
  • Exposure to varied architectures and technologies, accelerating your expertise in real-world contexts.


Turbo-Charged Learning and Development:

  • Access to Keystone Solutions? knowledge-sharing sessions, mentorship, and guidance for certifications.
  • Hands-on learning through mission-driven engagements that broaden technical and consulting capabilities.


Ambition Skyrocketing within a Consultancy Framework:

  • Structured pathways to grow your responsibilities across engagements, from ownership of security domains to leading cross-functional initiatives.
  • Merit-based recognition for impact delivered across client projects.


Keystone Solutions Values in Action:

  • As a K-Stone, you bring excellence, integrity, collaboration, and curiosity to every client mission.
  • Our values shape how we deliver: pragmatic solutions, transparent communication, and a relentless focus on outcomes.


Role and Skills Snapshot:

    • Active Directory
    • Algosec
    • Ansible
    • ExpressRoute
    • Firewall
    • IP Routing
    • Load Balancing
    • MPLS
    • Netskope
    • Problem Management
    • Proxy
    • Scripting
    • Switching
    • syslog
    • VPN IPsec
    • VPN SSL
    • WAF
    • WiFi


Your Impact as a Keystone Solutions Consultant:

  • Apply your network security expertise across multiple client scenarios, leveraging Keystone?s consulting framework to deliver measurable results.
  • Drive continuous improvement in security posture through auditing, automation, and best-practice implementation.


Apply Now:

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.

Key Skills

Ranked by relevance

network security firewalls cloud incident response security audits embedded switches routers vpns vpn dns
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Country Guide

Belgium

International hub for EU careers

Posted
Feb 26, 2026
Type
Full-time
Level
Not Applicable
Location
Brussels
Company
Keystone Solutions

Industries

Information Technology & Services

Categories

Information Technology

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