06/26/2026 updated
100 % available
Senior Network Operations & Security Specialist
Meteren, Netherlands
Only remote
Bachelor of Science in Network Operations and Security, Western Governors University (WGU), 2020About me
Freelance Senior Network Security Specialist with 10+ years of experience in enterprise networking and security. Skilled in Palo Alto, Check Point, Cisco ASA/FMC/WSA/ESA, F5 BIG-IP, Infoblox, VPNs, routing & switching, and network operations. Available for remote contracts.
Cisco Certified Network ProfessionalDomain Name System (DNS)Network AdministrationLoad BalancingFirewalls (Computer Science)Cisco FirewallsPalo Alto NetworksCheck Point FirewallsCisco Switches
Firewall Architecture & Management
Extensive expertise in designing, implementing, and managing enterprise firewall solutions including Check Point Firewalls R81, Palo Alto Firewall, and Cisco FMC. Architectural design and technical governance of complex security environments across large organizations.
DNS/DHCP/IPAM Solutions (Infoblox)
Deep hands-on experience with Infoblox NIOS for DNS, DHCP, and IPAM management. Ownership of high-level design, grid extension strategy, and migration frameworks to ensure controlled transition of business-critical DNS and DHCP services.
Load Balancing & Application Delivery (F5 BIG-IP)
Proven experience configuring and optimizing F5 BIG-IP (LTM/GTM) devices for load balancing, traffic management, application security, and high availability of business-critical services.
Cisco Networking (Switches, Routers & Wireless)
Broad experience with Cisco Switches, Routers, Cisco Prime Infrastructure, Cisco Wireless, and Cisco ASR, including configuration, migration projects, and large-scale infrastructure deployments.
VPN Technologies & Network Security Policies
Implementation and maintenance of VPN configurations, access control policies, and security policy management across complex enterprise network environments.
Security Monitoring & SIEM (Splunk, SolarWinds)
Utilization of Splunk and SolarWinds for security monitoring, incident troubleshooting, and maintaining the stability and security of network infrastructure.
Cisco ESA/WSA (Email & Web Security)
Administration of Cisco ESA and WSA devices to secure email communication, web traffic, and content filtering within corporate environments.
Identity Service Engine (ISE) & Network Access Control
Configuration and management of Cisco Identity Service Engine (ISE) for network access control and security policy enforcement.
Cloud Connectivity & High-Availability Network Design
Experience with cloud connectivity solutions, high-availability network designs, and large-scale infrastructure migrations ensuring business continuity.
Palo Alto Panorama (Centralized Firewall Management)
Centralized management and optimization of Palo Alto Networks firewalls via Panorama, ensuring standardized security policies and effective threat visibility across complex environments.
Extensive expertise in designing, implementing, and managing enterprise firewall solutions including Check Point Firewalls R81, Palo Alto Firewall, and Cisco FMC. Architectural design and technical governance of complex security environments across large organizations.
DNS/DHCP/IPAM Solutions (Infoblox)
Deep hands-on experience with Infoblox NIOS for DNS, DHCP, and IPAM management. Ownership of high-level design, grid extension strategy, and migration frameworks to ensure controlled transition of business-critical DNS and DHCP services.
Load Balancing & Application Delivery (F5 BIG-IP)
Proven experience configuring and optimizing F5 BIG-IP (LTM/GTM) devices for load balancing, traffic management, application security, and high availability of business-critical services.
Cisco Networking (Switches, Routers & Wireless)
Broad experience with Cisco Switches, Routers, Cisco Prime Infrastructure, Cisco Wireless, and Cisco ASR, including configuration, migration projects, and large-scale infrastructure deployments.
VPN Technologies & Network Security Policies
Implementation and maintenance of VPN configurations, access control policies, and security policy management across complex enterprise network environments.
Security Monitoring & SIEM (Splunk, SolarWinds)
Utilization of Splunk and SolarWinds for security monitoring, incident troubleshooting, and maintaining the stability and security of network infrastructure.
Cisco ESA/WSA (Email & Web Security)
Administration of Cisco ESA and WSA devices to secure email communication, web traffic, and content filtering within corporate environments.
Identity Service Engine (ISE) & Network Access Control
Configuration and management of Cisco Identity Service Engine (ISE) for network access control and security policy enforcement.
Cloud Connectivity & High-Availability Network Design
Experience with cloud connectivity solutions, high-availability network designs, and large-scale infrastructure migrations ensuring business continuity.
Palo Alto Panorama (Centralized Firewall Management)
Centralized management and optimization of Palo Alto Networks firewalls via Panorama, ensuring standardized security policies and effective threat visibility across complex environments.
Languages
EnglishFluentFrenchBasic knowledgeDutchFluent
Project history
Responsible for the architectural design and technical governance of the Infoblox DDI migration from ATOS to KPN. Owned the development of the High-Level Design (HLD), Grid Extension strategy, and overall migration framework to ensure controlled transition of business-critical DNS and DHCP services. Authored the end-to-end change plan and test plan, defining implementation sequencing, risk mitigation, rollback strategy, and validation criteria. Served as the technical authority coordinating alignment between KPN, NS, and ATOS stakeholders. Technologies: Infoblox NIOS, DNS, DHCP, Grid Architecture, High Availability, Change & Release Governance, Migration Strategy.
Responsible for the centralized management and optimization of Palo Alto Networks firewalls via Panorama, ensuring standardized security policies and effective threat visibility across complex environments. Managed F5 BIG-IP (LTM/GTM) load balancers to optimize application traffic and guarantee high availability for business-critical services. Administered Cisco firewalls through FMC, implementing security policies, intrusion prevention, and performing advanced traffic analysis and troubleshooting in collaboration with multidisciplinary teams.
Responsible for managing and maintaining Check Point Firewalls to establish secure perimeter defense, implementing access control policies, VPN configurations, and threat prevention mechanisms. Configuring and optimizing F5 Big IP devices for load balancing, traffic management, and application security. Implementing and maintaining Infoblox DNS/DHCP/IPAM solutions, ensuring efficient IP address management, DNS resolution, and DHCP service availability. Managing Cisco ESA and WSA devices to secure email communication, web traffic, and configuring content filtering.