Profilbild von Jens Wilczek Netzwerk Engineer CISCO / Enterprise Datacenter / Nexus / ASR9000 /HLD/LLD/ Ansible/ aus Huenenberg

Jens Wilczek


Letztes Update: 01.01.2022

Netzwerk Engineer CISCO / Enterprise Datacenter / Nexus / ASR9000 /HLD/LLD/ Ansible/

Firma: Jens Wilczek
Abschluss: nicht angegeben
Stunden-/Tagessatz: anzeigen
it depends of kind of project, remote possibilitys etc.
Sprachkenntnisse: deutsch (Muttersprache) | englisch (verhandlungssicher)


  • Spirent Testcenter Konzept / Desigh and implementation and administration
  • Nexus 9000, 7000, 5000 and 2000 specialist
  • Catalyst speialist
  • Routing and switching specialist on expert level
  • Paloalto PA5050 , Fortinet, Checkpoint hands on expirience
  • zoning concepts, Zero Trust setup and best praxis
  • ACI Setup and Implementation, migration Green Field to brown Field,  administration.
  • Ansible,
  • Migration ACE to F5 BIG IP LTM
  • Administration ACE 20/30 
  • IPSEC NGE WAN security solutions
  • Good knowledge and experience with projects for internet service providers and enterprise/data centre networks
  • HX Clustering
  • 20+ years in business


08/2014-now     R+V Versicherung  Wiesbaden (Ratiodata)
 (R+V: Migration Project ACE to F5 BIG IP LTM ACE20/30, support operation, engineering NGE solutions)
  • Full administration ACE20/30
  • Nexus 7010, 5076 and FEX Extender configuration
  • Design IKEv2 GET-VPN solution, migration DMVPN to FLEX-VPN, NGE
  • TCL Scripting , EEM scripting, Syslog, etc,
  • Riverbed Steelhead administration, troubleshooting e.t.c.
  • Bandwidth upgrades WAN-Side
  • Change initiation and coordination and implementation,
  • QIP administration
  • Support Operation, Support engineering, Support projects organization
  • Documentation
Visio, Cisco Prime, eHealth, CA Spectrum, BMC Remedy, WLC administration >400 AP, Router ISR1&2 1941, 2911, 3925, 3945, 6504, 6513, CAT3850Stack config-template NGE, SUP2T, SUP10G, AS1004, Nexus 7010, 5000, 2000, Riverbed SH, ASA5540 e.t.c.F5 Big IP LTM,
04/2014 -07-2014              Course CCNP R&S, CCIE R&S version 5, CCNP Security (new Version), EHCE course, VMware vSphere 5.1.
07/2013 – 03/2014                                               several IT and not IT based projects for IPSEC Net Solutions GmbH in USA and Switzerland
06/2012 – 06/2013             MPLS - Support and engineering / operation for a private Bank in Zürich.
                                           L2 Stack design and configuration - template creation, client migration to new Stacks and verification of function and completeness
L3 Stack design and configuration - template creation, client migration to new Stacks and verification of function and completeness.
Developing of new standard access-router and access-switch configuration – templates, definition of traps, community, access list , aaa, etc.
Hardware evaluation and migration to newer standards
TAC case opening and triggering
SNMP Trap Definition for Monitoring System with lab verification and implementation
creating of documentation and acceptance-test definition
NAC rule definition, setup an test environment and pilot implementation in parts of the operational environment

WAN-Edge VRF implementation:
routing and peering re-design in in lab environment
template definition and implementation during an maintenance window. Customization of access-rules for WAN-traffic         
Responsible to open new TAC cases and organization, preparation and implementation of new solutions during a maintenance window.

Setup 7206 VXR VSS Cluster with IOS 15.2.XX and „In Service Upgrade to new IOS version

configure new context, server, server farms, FW load balancing, probes, stickiness, redirection, backup, header insertion, header replacement, TCL Scripting etc.,  
Migration CISCO ACS 4.2 to 5.1
                                           User and profile management,
TACACS+ setup for user
Responsible for Initiating the change request and definition of the upgrade steps
organization of to-do workgroups (RED-HAT server systems, Windows server systems)
Organization of maintenance windows with all affected units
Acceptance test definitions and organization of the resources

ASA 5540 VPN administration, creating new VPN‘s for new customers and verification/troubleshooting of the configurations and sides

Checkpoint administration in “read only” modus to verify new implemented rules

office migration Hong Kong:, remote configuration and troubleshooting MPLS issue from ISP Interout. (Reference is available on request)

Implementation of multicast in the campus environment
(VRF-Lite based)
developing End to End solution,  setup different test scenario for troubleshooting and design/re-design
07/11/11 - 05/12/11                                             IT Project in Denver / CCIE LAB based IT Courses/ Colorado
09/04/11 to 19.06.12                                           Study travelling with family to NZ and USA to get experience with language, culture and technical know how.
01/11 – 06/04/2011                                              senior network engineer in well-known company Inventx, security cleared from GKB. Senior engineer for end-to end solutions and developing the new operational environment.
  • Engineering / troubleshooting from GKB network environments based on Nortel Passport 8600 and other Nortel switches like 450/470 and more.
  • engineering BB
  • Setup and CentOS 5.5 Server and implement Rancid as well as Nedi in conclusion with Cacti as new network and monitor tools
  • administration Juniper Netcreen NG5 GKB
  • administration Juniper SSG GKB
  • administration on Cisco CAT6509/Sup720 MPLS and global BB Inventx
10/09 – 09/10                     MPLS WAN and LAN Specialist for FION, one from the biggest energy and power trader in Switzerland
                                           I was responsible for:
  • The migration of  routers and switches to the new standards,
  • Important parts of the implementation of the new data centre environment based on Nexus 7k, Nexus 5000 and Nexus 2000 port extender equipment (any cast design & implementation).
  • Responsible for planning changes, building concepts for changes, pre configuration and implementation of the configuration templates on the backbone and data centre during the monthly change windows.
  • Setup MBGP, OSPF or static connections.
06/09 –08/09                      Network Engineer, Developing, testing and verification for a SHDSL.bis Ethernet First Mile concept in a team of several engineers for Vodafone. My responsibility for the verification of the layer2-design, regarding the behaviour of the QOS –features of the SHDSL.bis modem in connection with Alcatel 7302 ISAM and ALU7750 devices, documentation of the continued process and report it to the customer.
03-09 – 05/09                      Network Engineer: lead in design, developing and implementation Group Encryption Transport VPN solution in multi-vrf environment
                                           Concept - engineer in contract with well known ( for a GET-VPN design and implementation project with the focus to implement this technology at some Swiss Banks in cooperation with a Swiss ISP in Zurich.
  • Developing GET-VPN concept
  • Developing implementation strategies
  • Developing migration strategies
  • Preparation and pre configuration of pilot equipment
  • Setup lab environment
  • Roll-out and Implementation of pilot devices and testing in live environment
  • Coaching the Business Implementation Team of the Service provider on GET-VPN topics with focus on security related tasks like; IPSec, ISAKMP and CA PKI authorisation.
  • Backup engineer for roll-out to productive environment
08/08 – 02/09                     Network Engineer ans supporter: for BEWAN working for the Canton of Bern; Primary responsibilities for tickets and setup and maintenance of their MPLS network from Kanton Bern (BEWAN). 
                                           My tasks were:
  • Setup and Installation of new routers and switches with different kinds of connections
  • Speed upgrades (serial, Multilink, ADSL, SDSL, Ethernet with integration of QoS for voice and video applications
  • Troubleshooting Trouble tickets.
  • Handling change requests from customers to open firewall ports and applications requirements as well as Lan-to-Lan requests from different 3rd-party customers of the Canton of Bern
  • General troubleshooting
  • Definition of standards for connection types
  • Specifying and ordering material for installation
  • Sometimes field service and side-surveys for installation requirements,
  •  Documentation of changes and new installations.
12/07 – 06/08                     VPN Implementation Specialist for O2 in Germany with focus on business customers
                                           Working with MPLS, DMVPN, FR, OSPF, EIGRP, BGP, HSRP, VRRP, QoS , ADSL, SDSL, SHDSL, ADSL2+,ISDN, DDR, Call-back, RAS, SNMP, IPSEC,IS-IS, leased lines, PPPoE, PPPoA and other typical ISP requirements , Switching: Channelling, routing on a stick,  Voice-VLAN configuration, load balancing (GLBP),  trunking, IOS upgrades for routers and switches, CAT-OS. Traffic engineering with “local preference” and “admin distance” in conclusion with route-maps, sometimes special solutions for customers, where are no standard solutions are available.
10/07 – 11-07                      Network Engineer: Checking DWDM design Cisco ONS15454 Ring with 14 half-nodes for a chain of clinics in Hamburg, Germany (design with Metro planner 2.5.1)
06/07 – 08/07                     Cisco works and HPoV configuration for BASF in Basel
10/06 - 04/07                     Member as configuration Specialist from Business Assurance Implementation Team for ISP Cablecom (, Switzerland, responsible for the Service Business Assurance customers.
                                           Configuration and troubleshooting of Internet Service Provider typical hardware and software configuration of an MPLS environment, implementing this routers and switches
09/05                                  Setup of a wireless network with Netgear Routers and Netgear Access points; configuration of the highest possible security level for an automobile company in Vellmar, Germany. 
05/05                                  Freelancer: developing an IP-concept for a metal building company, connecting 4 departments together plus an ADSL connection in Vellmar/Germany
11/04-02/05                       Project member as network engineer for project “Technische Berufsschule Zürich” Atel (now a days it’s ALPIQ). Responsible for setup switches and wireless access points and builds a running environment.
07/04 up to today              Independently with Freelancing in different business units
05/01 – 04/03                     Entrance into the company Allcom AG, far AIS&S AG and Xicom located in Dübendorf. I was employed as system engineer as well as project manager for medium and big sized enterprise and service provider projects
04.12.2000 – 30.04.2001     Network Bootcamp Allcom Internetworking Collage, Dübendorf, Switzerland
1999 - 2000                         Project member as system engineer for „Lufthansa Passage server roll-out“. Responsible for data migration and Novell server setup and implementation
1994 - 1999                         Freelancing for IT-services and transport-services
1993 - 1994                         Filial EDV-Technicians for IT Firma Computer Revolution, filial Kassel, with consulting, responsible for network and PC service support
1992 – 1993                         EDV- Technicians, Fa. Mimpex, Vellmar, supporter for computer, printer, scanner, Novell based networks ver. 3.X

Zeitliche und räumliche Verfügbarkeit


Sonstige Angaben

Name:               Jens Wilczek

Address:            Dorfgässli 5
                       CH-6331 Hünenberg

Office:               0041 545 52 64
Mobil CH:          0041 76 831 43 24
Mobil GER:        0049 176 4123 29 62

Languages:   German, English