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About me


My name is Sebastiaan Versluis. I am a freelance senior network engineer with 20 years of experience.


A network engineer is a technology professional who has the necessary skills to plan, implement and oversee the IP data networks that support in-house voice, applications, data, video and wireless network services. Engineering deals with planning, design and technical specifications.


I have experience in networking and security, including hands-on experience in providing network support, installation and analysis for a broad range of LAN/WAN/MAN communication systems. Detailed understanding of different layer 2 and layer 3 protocols. Also experienced in secure data-center setup and operations.


I love structure and order. I also stand for quality. I like spending time fixing details and perform optimizations. I also feel comfortable working in a team since it blends complementary strengths.


Tux

Tux is a penguin character and the official brand character of the Linux kernel.

Linux has long been the basis of commercial networking devices, but now it's a mainstay of enterprise infrastructure.

Abilities

Quote "Life without knowledge is death in disguise"
Find some of my skills below (max rating: )

  • Local Area Network (LAN) design & setup - High Level Design (& business case) to Low Level Design hard skill
  • Wireless Local Area Network (WLAN) design & setup - High Level Design (&business case) to Low Level Design hard skill
  • Campus Area Network (CAN) design & setup - High Level Design (& business case) to Low Level Design hard skill
  • Metropolitan Area Network (MAN) design & setup - High Level Design (& business case) to Low Level Design hard skill
  • Wide Area Network (WAN) design & setup - High Level Design ((& business case)) to Low Level Design hard skill
  • Enterprise Private Network (EPN) design & setup - High Level Design (& business case) to Low Level Design hard skill
  • Virtual Private Network (VPN) design & setup - High Level Design (& business case) to Low Level Design hard skill
  • IT network security, control and manage the environment (setup & operations) hard skill
  • Make machine data accessible by identifying data patterns & providing metrics & intelligence for operations hard skill
  • IT infrastructure DC LAN & network migrations hard skill
  • Programming/scripting with a focus on rapid network deployment and/or monitoring critical infrastructure hard skill
  • Network project management or network team lead hard skill
  • Cisco Systems IOS, IOS XE, IOS XR & NX-OS technical skill
  • Linux Debian, Linux openSUSE, Linux Ubuntu technical skill
  • L2 switching, VLANs, spanning-tree, VRRP, HSRP, VSS, L2 WAN extension with high availability technical skill
  • L3 IP routing (& virtualization): GRE, VRF, VXLAN, BGP, EIGRP, IGRP, OSPF, RIP, NAT with high availability technical skill
  • Defenses against L2 attacks: Port Security, Root Guard, BPDU Guard, Loop Guard, DHCP snooping, Dynamic ARP Inspection, Storm Control technical skill
  • Defenses against L3 attacks: Firewalls & related services i.e. Cisco, Checkpoint, iptables, UFW, IPS/IDS, Squid Proxy technical skill
  • Setup, maintaining & hardening of Linux network applications & services (DNS, DHCP, Radius, Nginx, Proxy, Snort, strongSWAN, Quagga, Zebra technical skill
  • Setup, maintaining & hardening of Linux telemetry applications & services i.e. SNMP, NetFlow, Syslog, Cacti, NeDi, Nagios, Graphite, Zabbix technical skill
  • Setup, maintaining & hardening of Windows network applications & services (DNS, DHCP, Radius, Active Directory, FTP, SMB, IIS, etc) technical skill
  • Proficient in diagnose and troubleshooting with i.e. following tools: ping, traceroute, nmap, nslookup, tcpdump, wireshark, netflow, snmptools) technical skill
  • Scripting/programming i.e. Ansible, Bash scripts, FPC/Delphi, Perl, Phython, Batch, Powershell technical skill
  • Communication soft skill
  • Collaboration soft skill
  • Critical Thinking soft skill
  • Problem Solving soft skill
  • Troubleshooting soft skill
  • Detail Oriented soft skill

Experience

Quote "Life can only be understood backwards, but it must be lived forwards"











Contact


Visit: ICTSLUIS - Fascinatio Boulevard 220 - 3065WB (Zip) - Rotterdam - The Netherlands

Phone: +31107988530

Email: sebastiaanversluis@ictsluis.nl

Linkedin: profile in new tab

Availability

AVAILABLE

Available for new assignments! Please use the contact details if you like to get in touch with me.

Partners

B-CT: Independent advice & management for communication technology

Initium: ICT Architecture - advice, project and interim management

Blog & news