Open to collaborations & guest lectures
whoami

Guido Frissaer

Lecturer in Systems and Network Management @ Hogeschool PXL · MSc. Industrial Engineer

Sint-Truiden, Flanders, Belgium

Get in touch LinkedIn
// about_me

About Me

I combine technical depth in Linux and networking with practical, student-focused teaching.

Profile

I am a lecturer at Hogeschool PXL within PXL-Digital, with a background in Industrial Engineering Sciences and a specialization in Electronics-ICT from Hasselt University.

My work focuses on translating complex infrastructure and networking concepts into clear lessons, hands-on labs, and practical scenarios that students can apply immediately.

Approach

Practice-oriented teaching built around real Linux and networking environments.
Clear progression from fundamentals to troubleshooting, security, and automation.
Modern tooling and AI only where they genuinely improve the learning experience.
Strong focus on motivation, independence, and readiness for professional IT contexts.
// technical_stack

Skills & Certifications

── Linux & Systems Administration
RHEL Debian / Ubuntu Bash scripting nftables / Firewalld Kea-DHCP DNS / Bind9 Squid Proxy SELinux VMware vSphere Virtualisatie & Containers
── Networking
CCNA Enterprise Networks Routing & Switching (OSPF, EIGRP, STP) VPN / IPSec / GRE Wireless LAN Packet Tracer / GNS3 VLANs / Trunking Network Troubleshooting
── AI & Development
AI-enhanced Course Design AI-Assisted Coding AI Automation AI Infrastructure AI Model Deployment AI Tools and Methodologies AI Workflows Generative AI tooling Data Pipelines Python Responsible AI Retrieval Augmented Generation (RAG) Workflow Optimization Markdown / LaTeX Git / Version Control Data Analysis
── Credly Verified Skills (Networking & Security)
Access Security Dual Stack eBGP Fundamentals EIGRP Optimizations Infrastructure Security IP Services Layer-2 Redundancy Network Assurance Network Automation OSPF Implementations Quality Of Service Remote Access Site-to-site VPNs Virtualization Wireless Access Points Wireless LAN Controllers BGP Advanced Features Bidirectional Forwarding Detection Dynamic Multipoint VPNs EIGRP Troubleshooting Flexible Netflow GRE Tunnels IPsec IPv6 First Hop Security MPLS VPNs OSPF Optimizations Route Redistribution SNMP Ethernet IP Connectivity IP Subnetting IPv4 and IPv6 Addressing Network Fundamentals Security Fundamentals Switching Access Connectivity First-hop Redundancy High Availability Routing Switching Protocols Dynamic Routing Network Address Translation (NAT) Network Automation Basics Quality Of Service (QoS) Security Threat Mitigation Software Driven Networks Wide Area Networks AAA Access Control Lists ASA Authentication Confidentiality Cryptography Data Confidentiality Integrity Intrusion Prevention Systems Layer 2 Attacks Remote-access VPNs Site-to-site IPsec VPN Stateful Firewall Troubleshooting Zone-Based Policy Firewall Application Layer Services IPv4 Addresses Network Media Network Types Protocols Standards Wireless Access Binary Systems Cisco Devices Cisco IOS Cisco Routers Cisco Switches Copper and Fiber Cabling Documentation Endpoint Devices Help Desk Hierarchical Network Design Network Layer Protocols Transport Layer Protocols User Support ARP IPv4 Subnetting Cloud Services Virtualization and Cloud Services
── Credly Verified Skills (Linux, Automation & Teaching)
Application Deployment Applications Application Security Automation Cisco Platforms Development Cloud DevOps DevOps Engineer Infrastructure and Automation IoT JSON Network Infrastructure Python Software Design Software Development Basic Hardware Concepts Basic Scripting Closed Source Applications Command Line Creating/Restoring Backups File Management Linux OS Components Open Source Applications System Security User/Group Permissions Experience Facilitation Presentation Skills Teaching Training Adverbs Articles Comparative Forms Countable and Uncountable Nouns Idioms Phrasal Verbs Prepositions Superlative Forms Conditional Sentences Imperative Forms Modal Verbs Present Continuous Present Perfect Adjectives Gerunds Modals of Obligation Relative Clauses Transitive Verbs Adjective Formation with Prefixes and Suffixes Cybersecurity Vocabulary Determiners Generic and Impersonal Pronouns Indefinite Compound Pronouns Polite Indirect Questions Quantifiers

// certifications
CCNP: Core Networking
Cisco (2024)
CCNP: Core Networking badge

Enterprise-level switching, routing and wireless architecture—the backbone of my lab design and student instruction. Issued Nov 2024.

CiscoOSPFQoSNov 2024
CCNP: Advanced Routing
Cisco (2024)
CCNP: Advanced Routing badge

Advanced routing protocols (BGP, OSPF) and VPN design. Applied directly in enterprise network courses. Issued Nov 2024.

CiscoBGPIPsecNov 2024
DevNet Associate
Cisco (2024)
DevNet Associate badge

Python APIs and infrastructure automation—skills I use in AI-assisted course design and network scripting. Issued Jan 2024.

CiscoPythonAPIsJan 2024
Cisco AI Technical Practitioner
Cisco (2026)
Cisco AI Technical Practitioner badge

Foundational to intermediate AI skills focused on workflow automation, AI solution design, and responsible AI in technical teams. Issued Mar 2026.

CiscoAIAutomationMar 2026
Networking Devices and Initial Configuration
Cisco (2026)
Networking Devices and Initial Configuration badge

Core skills in cloud and virtualization concepts, IP addressing, and initial Cisco device setup to build and validate small networks. Issued Mar 2026.

CiscoInitial ConfigIPv4Mar 2026
Network Addressing and Basic Troubleshooting
Cisco (2026)
Network Addressing and Basic Troubleshooting badge

Focused on IPv6 addressing, multi-layer end-to-end connectivity, and practical troubleshooting in Packet Tracer activities. Issued Mar 2026.

CiscoAddressingTroubleshootingMar 2026
Network Support and Security
Cisco (2026)
Network Support and Security badge

Covers endpoint, user and network support with hands-on diagnostics, documentation, and remote support workflows. Issued Mar 2026.

CiscoSupportSecurityMar 2026
Network Technician Career Path
Cisco (2026)
Network Technician Career Path badge

Comprehensive path covering networking fundamentals, Cisco device setup, troubleshooting, support, and foundational wireless practice. Issued Mar 2026.

CiscoCareer PathNetworkingMar 2026
English for IT: Describing and Comparing
Cisco (2026)
English for IT: Describing and Comparing badge

Builds practical English communication for describing and comparing systems, processes, and project collaboration in IT contexts. Issued Mar 2026.

CiscoEnglish for ITCommunicationMar 2026
English for IT: Advice and Time
Cisco (2026)
English for IT: Advice and Time badge

Covers modal verbs, conditionals, and tense usage to give advice, instructions, and progress updates in day-to-day IT scenarios. Issued Mar 2026.

CiscoEnglish for ITAdviceMar 2026
English for IT: Needs and Responsibilities
Cisco (2026)
English for IT: Needs and Responsibilities badge

Strengthens IT-focused English for responsibilities, collaboration, and process descriptions using accurate professional language. Issued Mar 2026.

CiscoEnglish for ITResponsibilitiesMar 2026
English for IT: People and Quantities
Cisco (2026)
English for IT: People and Quantities badge

Focuses on people-related communication, quantities, and cybersecurity vocabulary for clear and polite interaction in IT environments. Issued Mar 2026.

CiscoEnglish for ITCybersecurity VocabularyMar 2026
Linux Essentials & Linux Unhatched
Cisco (2024)
Linux Essentials badge

Practical Linux command line, file management and shell scripting—foundation for everything I teach. Issued Oct 2024.

Cisco/NDGLinuxCLIOct 2024
Network Security
Cisco (2024)
Network Security badge

Firewall and VPN configuration through hands-on labs. Knowledge I share with students in security modules. Issued Feb 2024.

CiscoFirewallVPNFeb 2024
IELTS Academic - C1 (CEFR)
British Council (2026)
IELTS Academic C1 certificate preview Open full PDF

Confirms I can teach and communicate confidently in English, both in class and in international contexts.

EnglishC12026
RH124 / RH134 / RH254 Attendance
Red Hat (2024)
RH124 certificate preview RH124 RH134 certificate preview RH134 RH254 certificate preview RH254

Hands-on Red Hat training in Linux administration, from core operations to advanced system tasks in enterprise-style environments.

Red HatLinux2024
TryHackMe Learning Paths
TryHackMe
Pre Security Learning Path preview Pre Security Complete Beginner Learning Path preview Complete Beginner Jr Penetration Tester preview Jr Penetration Tester Web Fundamentals Learning Path preview Web Fundamentals Introduction to Cyber Security preview Intro to Cyber Security

A practical set of security learning paths where I built up fundamentals and entry-level pentesting skills step by step.

SecurityHands-on2023-2024
Advent of Cyber Challenges
TryHackMe
Advent of Cyber 2025 preview 2025 Advent of Cyber 2024 preview 2024 Advent of Cyber 2023 preview 2023

Annual cybersecurity challenges I use to keep sharpening practical skills outside regular course work.

TryHackMeSecurity2022-2024
Cisco Live 2024 - NetAcad Day
Cisco Live (2024)
Cisco Live 2024 NetAcad Day attendance preview Open full PDF

Participation in Cisco Live 2024 NetAcad Day, with insights I bring back into my networking courses.

CiscoNetAcadEvent
CCNA: Introduction to Networks
Cisco (2022)
CCNA: Introduction to Networks badge

Network fundamentals including subnetting and IP addressing—the starting point for all my advanced courses. Issued Sep 2022.

CiscoITNSubnettingSep 2022
CCNA: Switching, Routing, and Wireless Essentials
Cisco (2023)
CCNA SRWE badge

Switching, routing and wireless fundamentals including redundancy and security. Core concepts for enterprise network design. Issued Jan 2023.

CiscoSRWEWirelessJan 2023
CCNA: Enterprise Networking, Security, and Automation
Cisco (2023)
CCNA ENSA badge

Dynamic routing, QoS, WAN design and network automation at enterprise scale. Directly applied in CCNA 3 coursework. Issued Jun 2023.

CiscoENSAAutomationJun 2023
Networking Basics
Cisco (2024)
Networking Basics badge

Network basics refresher via Packet Tracer simulation labs. Issued Feb 2024.

CiscoBasicsIPv4Feb 2024
Instructor 1 Year of Service
Cisco (2024)
Instructor 1 Year of Service badge

Recognition for active teaching and student impact within the NetAcad program. Issued Mar 2024.

CiscoInstructorTeachingMar 2024
// courses_taught

Teaching

🐧
Linux Essentials
Linux command line, file management, users/groups and shell scripting in practical lab environments.
Bachelor · Year 1
⚙️
Linux Advanced
Server administration with RHEL: nftables, SELinux, Kea-DHCP, Bind9, Squid, systemd and enterprise services.
Bachelor · Year 2-3
🌐
Networks 1 (CCNA 1)
CCNA 1 fundamentals: OSI/TCP-IP concepts, Ethernet switching, IPv4/IPv6 addressing, subnetting, and baseline Cisco device configuration in Packet Tracer labs.
Associate degree · Year 1
🌐
Networks 2 (CCNA 2)
CCNA 2 progression: VLANs, trunking, inter-VLAN routing, STP, EtherChannel, and first-hop redundancy, combined with hands-on Cisco troubleshooting labs.
Associate degree · Year 1
🌐
Enterprise Networks 1 (CCNA 3)
CCNA 3 enterprise focus: OSPF, ACLs, NAT, QoS, WAN concepts, and network security, with design and troubleshooting assignments in Cisco lab environments.
Associate degree · Year 2
💼
Workplace Learning 1
Combination of soft skills and technical preparation: planning, self-branding, collaboration, GitHub usage, documentation, and practical assignments. Students also explore possible jobs after graduation so they can better assess whether this study path is the right fit for them.
Associate degree · Year 1
Previously taught
🖥️
C Programming
Focused on learning to think like a programmer: problem-solving reasoning, algorithmic fundamentals, and the basics of C programming through step-by-step exercises.
Bachelor · Year 1
Previously taught
🪟
System Essentials Windows
Windows 10/11 fundamentals with a focus on system usage, PowerShell, scripting, and command-line skills through practical exercises.
Bachelor · Year 1
Previously taught
🐧
System Essentials Linux
Linux command line, file management, users/groups, and shell scripting in hands-on lab environments.
Bachelor · Year 1
// projects

Projects

🤖
AI-Assisted Course Design
Personal education project where AI tools are used to strengthen course material, diversify exercises, and improve learning outcomes.
Educational Innovation · Personal Project
// work_experience

Experience

Oct 2021 — Present
Lecturer in Systems and Network Management
Hogeschool PXL · PXL-Digital, Hasselt
  • Teaching the courses Linux Essentials, Linux Advanced, Networks 1, Networks 2, Enterprise Networks 1, and Workplace Learning 1
  • Design and maintenance of practice-oriented Cisco and VMware lab environments
  • Development of course materials, assignments, and assessments
  • Integration of AI tools where they measurably improve learning quality
  • Curriculum alignment with current industry practice and relevant certification paths
Nov 2020 — Aug 2021
Student Worker
BEEGO
  • Student job in IT support
Feb 2019 — May 2019
Internship
Tosoh Bioscience Diagnostics Europe, Tessenderlo
  • IT internship in an industrial and diagnostics environment
2015 — 2021
Student Worker (multiple organizations)
CM, Ijzerwaren Pierard, others
  • Recurring student jobs in support and operational roles
// education

Education

2019 — 2021
Master's Degree Industrial Engineering Sciences - Electronics-ICT
UHasselt & KU Leuven
Joint IIW program, UHasselt & KU Leuven
2015 — 2019
Bachelor's Degree Electronics-ICT
Hogeschool PXL, Hasselt
Professional bachelor's program in Electronics-ICT
2012 — 2015
Secondary Education in Industrial Sciences
Scholengroep Domein Speelhof
Sint-Truiden
2010 — 2011
Secondary Education in Modern Sciences
vzw KCST-Technicum
Pre-university secondary track
// volunteer_experience

Volunteer Work

Jan 2021 — Present
Department Chair
Rode Kruis-Vlaanderen
Feb 2014 — Present
First Aid Responder
Rode Kruis-Vlaanderen
Dec 2018 — Dec 2020
Department Lead Communication and Recruitment
Rode Kruis-Vlaanderen
Jan 2020 — Dec 2020
Vice Chair
Rode Kruis-Vlaanderen
Jul 2017 — Mar 2020
Webmaster
Rode Kruis-Vlaanderen
// languages

Languages

Nederlands Native
English Fluent (C1)
Français Limited Working Proficiency
Deutsch Basic Proficiency
// interests

Personal

  • Passion for Linux, networking and education
  • Student-centered, motivating teaching style
  • Strong social engagement via Red Cross Flanders
  • Ongoing focus on AI tools in education
  • Objective and open-minded problem-solving approach