Nenad Karlovcec
Designing, securing, and automating complex network infrastructures across enterprise environments.
Professional Summary
Seasoned network security professional with deep expertise in security architecture, firewall design, and network security assessments. Strong background in the design, implementation, and hardening of complex IP-based networks.
Skilled across major firewall platforms (Palo Alto, Fortinet, Cisco, Check Point) with a focus on security policy development, threat prevention, and infrastructure protection. Recognised for initiative, hands-on delivery, and mentoring.
Professional Experience
iON United
Team Lead, Service Delivery
iON United
Sr. Network Security Engineer
iON United
Sr. Network Architect
University of Toronto
Firewall Engineer
Contributed to projects and day-to-day operations within the Network Security Team, managing a fleet of Cisco ASA appliances and internet-facing Palo Alto firewalls.
Oslon IT Limited
Owner
Independent contractor focused on networking and security technologies. Delivered projects with leading integrators (CDW Canada, Insight Canada) in Sr. Network Security Consultant / Network Architect roles. Frequently acted as project Team Lead: coordinating engineers, guiding solution design, and ensuring successful delivery.
Siemens Canada Limited
Network Consultant
Implemented designs including RUGGEDCOM products and multivendor solutions; developed training curricula and materials; delivered training; advanced routing/switching services across RUGGEDCOM platforms (ROXI, ROXII, ROS).
Technical Skills
Vendors
Routing & Switching
Network Technologies
Cloud, Platforms & Automation
OS & Applications
Certifications
PCNSC
Palo Alto — Network Security Consultant
Exp. Mar 2027
PCNSE
Palo Alto — Network Security Engineer
Exp. Mar 2027
PCSFE
Palo Alto — Software Firewall Engineer
Exp. May 2026
FCSS
Fortinet — Network Security Specialist
Exp. Aug 2026
FCP
Fortinet — Network Security Professional
Exp. Mar 2026
PSE (SASE)
Palo Alto — SASE Professional
Exp. Jun 2026
PSE
Palo Alto — Software FW Professional
Exp. Jul 2026
PCCSE
Prisma Cloud — Cloud Security Engineer
Exp. Jul 2026
Selected Projects
Signature Infrastructure Work
New Network Build & Migration
Migration from existing firewall and LAN to new vendors. Complete redesign and security hardening.
Sr. Network Architect / Technical Lead
IT Mission Global Services
Multi-Site Fortinet Deployment
Multi-site rollout including ADVPN solution, remote access, and FortiAuthenticator-based authentication.
Sr. Network Architect / Technical Lead
IT Mission Global Services
Redundant WAN Design
Fully redundant network with certificate-based IPSec VPNs, dynamic routing, User-ID + SSL decryption, and DUO MFA.
Network Architect / Technical Lead
IT Mission Global Services
Firewall Migration
Architecture and migration from Cisco ASA to Fortinet 200F with new services implementation.
Sr. Network Consultant / Technical Lead
IT Mission Global Services
UAT / PoC: URL, Threat, WildFire, SSL
Proof of Concept testing for URL filtering, threat prevention, WildFire, and SSL decryption capabilities.
Sr. Network Consultant / Technical Lead
University of Toronto
Network Segmentation Programme
Segmentation programme replacing existing L3 switches with Extreme Networks VSP appliances.
Sr. Network Consultant / Technical Lead
Capgemini Canada — Ontario Power Generation
SD-WAN Proof of Concept
SD-WAN proof of concept design and configuration.
Sr. Network Consultant / Technical Lead
IT Mission Global Services
SD-WAN Replacement Programme
Replacing existing security appliances with a Cisco Meraki SD-WAN solution.
Sr. Network Consultant / Technical Lead
IT Mission Global Services
New Network Build
New network build using Cisco ISR, ASA, and Catalyst setup and configuration.
Sr. Network Consultant / Technical Lead
IT Mission Global Services
Education
University of Zagreb
Physics & Computer Science (Masters)
Languages
Ready to fortify your
network infrastructure?
Consult on architectural design, security audits, or large-scale automation projects.