Network Engineer - SD-WAN & Zero Trust

Join Keystone Solutions as a Network Engineer consultant for a client-facing mission focused on designing, implementing, securing, and supporting modern enterprise network infrastructures across on-premises and cloud environments. This consultancy assignment spans 6-12 months with potential extension, requires on-site presence three days per week, and may involve occasional travel within Europe. As a Keystone Solutions consultant, you will bring a security-first mindset and deliver high-quality outcomes while collaborating closely with client stakeholders in a dynamic setting.

Consultancy Nature of Work:

As a Keystone Solutions consultant, you will operate within the client's environment, working on-site three days per week and engaging directly with client teams. You will apply your expertise to their enterprise network landscape across LAN, WAN, SD-WAN, wireless, cloud connectivity, and security, ensuring alignment with best practices and the client's strategic objectives.

Dynamic Projects:

This mission offers exposure to diverse challenges across on-premises and cloud networking, Zero Trust Network Access, SD-WAN, and enterprise security technologies. You will collaborate with cybersecurity, cloud, and infrastructure teams, contribute to incident response and root cause analysis, and support lifecycle management activities, providing a rich, evolving project scope.

Turbo-Charged Learning and Development:

By working across technologies such as Palo Alto Networks firewalls, Prisma solutions, Cisco and HPE/Aruba switching and routing, and cloud networking (AWS, Azure, or Google Cloud), you will deepen your technical breadth and sharpen troubleshooting and analytical skills. Documentation, design, and operational procedure creation further reinforce continuous professional growth.

Ambition Skyrocketing within a Consultancy Framework:

Keystone Solutions empowers consultants to deliver excellence in complex environments. Through this engagement's scale and variety-from Zero Trust and segmentation to high availability architectures-you will strengthen your capability to lead initiatives, mentor junior engineers, and drive impactful results in a fast-paced context., * Design, deploy, and maintain enterprise network infrastructure including LAN, WAN, SD-WAN, wireless, and cloud connectivity.

• Implement and support Zero Trust Network Access (ZTNA) architectures and security best practices.
• Configure, manage, and troubleshoot Palo Alto Networks firewalls and security policies.
• Deploy and support Prisma solutions including Prisma Access and Prisma Cloud.
• Manage switching and routing environments using Cisco and HPE/Aruba technologies.
• Monitor network performance, availability, and security posture using enterprise monitoring tools.
• Collaborate with cybersecurity, cloud, and infrastructure teams to ensure secure network integration.
• Support VPN technologies, segmentation, NAC, and identity-aware access controls.
• Perform network upgrades, firmware updates, patching, and lifecycle management.
• Create and maintain technical documentation, diagrams, and operational procedures.
• Participate in incident response and root cause analysis for network/security issues.
• Provide technical guidance and mentorship to junior engineers where applicable.

Do you have experience in WAN?, * 3-7+ years of experience in network engineering or infrastructure engineering roles.

• Strong understanding of SD-WAN technologies and WAN optimization concepts.
• Experience implementing or supporting Zero Trust security models.
• Hands-on experience with:

• Palo Alto Networks firewalls
• Prisma Access and/or Prisma Cloud
• Cisco switching and routing
• HPE/Aruba switching technologies

• Strong knowledge of:

• TCP/IP, DNS, DHCP, BGP, OSPF, VLANs, VPNs
• Network segmentation and micro-segmentation
• Firewall policy management and NAT
• High availability and redundancy architectures

• Experience with cloud networking concepts in AWS, Azure, or Google Cloud.
• Strong troubleshooting and analytical skills.
• Excellent communication and documentation abilities.

Preferred Qualifications:

• Certifications such as:

• PCNSA / PCNSE
• Cisco CCNA / CCNP
• Aruba certifications
• ZTNA or cloud security certifications

• Experience with:

• SASE architectures
• NAC solutions
• Automation and scripting (Python, Ansible, Terraform)
• SIEM and monitoring platforms
• Hybrid cloud networking

Desired Attributes:

• Security-first mindset
• Strong customer service orientation
• Ability to work independently and collaboratively
• Adaptable in fast-paced environments
• Detail-oriented with strong problem-solving skills

Example Technologies Environment:

• Palo Alto Networks Firewalls
• Prisma Access
• Prisma Cloud
• Cisco Catalyst / Nexus
• Aruba / HPE Switching
• SD-WAN Platforms
• Azure / AWS Networking
• VPN & Zero Trust Solutions
• Network Monitoring & SIEM Tools, As a K-Stone consultant, you bring a security-first, service-oriented, and collaborative approach to every engagement. You balance independence with teamwork, adapt quickly to changing priorities, and maintain meticulous documentation and problem-solving practices to support reliable, secure, and scalable network operations.