Senior Network Engineer.
Network nerd at home.

Profile

Networks at work and at home.

Senior network engineer in Switzerland. Since 2001 on carrier backbones, enterprise networks, energy and public-safety networks. Trained as a communication electronics technician from 1997.

Networks are also my hobby. I run AS203496, a small IPv6-only network with its own RIPE resources, RPKI and two upstreams. Part of this page is served from it.

Residence

Switzerland

Own network

AS203496 · 2001:67c:1948::/48

Languages

German (native) · English (full professional)

Focus

Design · Engineering · Operations

Top skills

Network Design · Network Engineering · Network Operations · Network Security · Critical Infrastructure

Born

16 December 1979 · Wesel, Germany

Experience

1. 02/2026 - now

   Senior Network Engineer

   Jungfraubahnen Management AG - Interlaken, Switzerland · On-site

   Network engineering and operations.

   [network engineering] [network operations] [system administration]

2. 01/2022 - 01/2026

   Senior Network Engineer WAN

   Axpo Systems AG - Belp, Canton of Bern, Switzerland · Hybrid

   Design and operations of mission-critical networks: Polycom emergency radio, OT networks for power and transport, rail and highway operators. Designed aXbone NG, the next Axpo core. RIPE LIR contact for AS60284.

   [ip/mpls] [mpls-tp] [bgp] [evpn] [flexe] [ripe lir] [juniper mx] [eci/ribbon] [huawei] [aviat] [critical infrastructure]

3. 08/2020 - 12/2021

   IT Network Engineer

   Bern University of Applied Sciences · BFH - Bern, Switzerland · Hybrid

   Network infrastructure of the university across several campuses: WAN, LAN, Wi-Fi, Internet, data centres, automation.

   [cisco] [arista] [sdn] [ansible] [evpn/vxlan] [ipv6] [linux] [dns]

4. 04/2020 - 07/2020

   Customer Solution Authority

   Vodafone Business - Düsseldorf, Germany

   Technical lead for one customer account: network design, solution architecture, change management.

   [network architecture] [solution architecture] [change management]

5. 12/2018 - 03/2020

   Sales Engineer

   Colt Technology Services - Greater Düsseldorf Area · Hybrid

   Pre-sales and solution design for data services, firewalls and DDoS mitigation.

   [pre-sales] [network design] [ddos mitigation] [adva] [ciena] [juniper]

6. 01/2016 - 11/2018

   Administrator 2nd Level Data

   1&1 Versatel - Essen, Germany

   Operations and troubleshooting for the IP network: core and edge AS8881, MPLS VPN core AS15717, metro NGN edge.

   [as8881] [bgp] [ospf] [mpls] [vpn] [firewalling] [ipv6] [xdsl] [bras] [huawei] [cisco]

7. 01/2014 - 11/2015

   Consulting Network Products Engineer

   Verizon Enterprise Solutions - Dortmund, Germany · On-site

   Product engineering for new network offerings.

   [product engineering] [network design]

8. 03/2008 - 12/2013

   Consulting Engineer · Network Planning & Engineering Europe

   Verizon Enterprise Solutions - Dortmund, Germany · On-site

   Technology lead for the European core AS702: architecture, traffic engineering, peering, vendor engineering, proofs of concept.

   [juniper m/mx/t/ptx] [cisco gsr/crs] [bgp] [is-is] [ospf] [mpls] [rsvp-te] [ldp] [vpls] [ipsec] [l2tp] [arbor tms] [ipv6]

9. 03/2001 - 02/2008

   IP Network Engineer · IP NOC Technician · NMC Transmission

   HanseNet - Hamburg, Germany · On-site

   Transmission in the NMC, then the 24/7 IP NOC, then third-level IP support for AS13184 core, edge and access.

   [as13184] [sdh/pdh] [dwdm] [microwave] [v5.2] [juniper erx/e320] [bgp] [ospf] [mpls] [vpn] [qos/cos] [ip operations]

10. 09/1997 - 02/2001

    Communication Electronics Technician

    Deutsche Bahn AG - Wuppertal, Germany

    Vocational training at Deutsche Bahn with the Berufskolleg am Haspel, Wuppertal.

Expertise

Architecture

Core, backbone and WAN design.

Routing

BGP, IS-IS, OSPF, MPLS, EVPN.

Transport

Ethernet, FlexE, DWDM, SDH, microwave.

Automation

Linux, open tooling, repeatable operations.

Own AS

AS203496: IPv6-only, RPKI, two transits.

Skills

Top skills

Network Design · Network Engineering · Network Operations · Network Security · Critical Infrastructure

Routing & protocols

IP · TCP/IP · IPv6 · BGP · OSPF · IS-IS · MPLS · SRv6 · VPLS · EVPN · EVPL · VPN · L2/L3 protocols · Routing Protocols · QoS

Transport & access

Ethernet · Metro Ethernet · DWDM · SDH · Transmission · WAN · Enterprise Network · Next-Generation Network · Internet Services · VoIP

Security & platforms

Firewalls · Cloud Networking · Cloud Computing · Cloud Security · System Administration · Telecommunications · Digital Transformation · Customer Support

Credentials