Christian Wolpert - Cisco Catalyst Center - SDA Wireless Consultant

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Bad Tölz, Germany

Experience

Nov 2024 - Mar 2025

5 months

Berlin, Germany

Cisco Catalyst Center - SDA Wireless Consultant

IT Service Provider

Implemented Cisco Catalyst Center wireless network for a federal ministry in Berlin, focusing on wireless topics
Troubleshooting day-0, day-1 and day-N templates for zero-touch provisioning of switches and access points
Client authentication and authorization troubleshooting using Cisco ISE
Wireless guest access via Cisco ISE captive portals
Ekahau site surveys and WLAN survey reports
Cisco DNA Center, Cisco WLC and Cisco ISE
LAN and WLAN network design and planning based on existing HLD and LLD documents
C9300L and C9500 series switches, CW9166i APs

Jun 2024 - Oct 2024

5 months

Germany

Cisco Catalyst Center - SDA Consultant

IT Service Provider

PoC for outdoor zero-touch provisioning of APs using Cisco Catalyst Center
PoC for switch stack replacement (RMA) of C9300 and C9500 series switches via Cisco DNA Center, Catalyst Center
Troubleshooting day-0, day-1 and day-N issues caused by claim files for zero-touch provisioning
Client authentication and authorization troubleshooting using Cisco ISE
Cisco DNA Center, Cisco WLC and Cisco ISE
LAN and WLAN network design and planning based on existing HLD and LLD documents
Implementation and rollout of networks ranging from 1 to 100 access switches
C9300L, C9500 series switches, C9120 APs

Feb 2024 - Mar 2024

2 months

Germany

Principal Wireless Consultant

IT Service Provider

Designed Cisco SD-Access for LAN and WLAN using Cisco Catalyst Center and Cisco ISE
Drafted PoC for SD-Access design
Drafted PoC for Meraki AP design

Jun 2023 - Nov 2023

6 months

Germany

Principal Wireless Consultant

IT Service Provider

Cisco SD-Access design based on Cisco DNA Center
Consolidated WLAN SSIDs used in production
Redesigned an existing WLAN solution for WiFi 6 and WiFi 6E
From September, drafted a PoC paper for Cisco SD-Access for LAN and WLAN using Cisco DNA Center and Cisco ISE, plus PoC for Meraki APs

Jun 2023 - Jun 2023

1 month

Germany

Principal Wireless Consultant

Retailer

Reviewed WLAN designs for 802.11ac/802.11ax and WiFi 6E
Redesigned multiple WLAN solutions for WiFi 6 and WiFi 6E in office and distribution buildings
Troubleshot client roaming issues using Huawei and Extreme switches and SonicWall APs (LAN issue: ARP)
Concept for Cisco Meraki APs
AP configuration for high-density WLANs in office and distribution buildings
Evaluated WLAN client roaming issues
Ekahau AI Pro site surveys
Introduced 802.1X authentication for barcode scanners

Feb 2023 - Feb 2023

1 month

Germany

Principal Wireless Consultant

Retailer

Reviewed WLAN designs for 802.11ac/802.11ax and WiFi 6E
Redesigned multiple WLAN solutions for WiFi 6 and WiFi 6E in office and distribution buildings
Troubleshot client roaming issues using Huawei and Extreme switches and SonicWall APs (LAN issue: ARP)
Concept for Cisco Meraki APs
AP configuration for high-density WLANs in office and distribution buildings
Evaluated WLAN client roaming issues
Ekahau AI Pro site surveys
Introduced 802.1X authentication for barcode scanners

Jan 2023 - Mar 2023

3 months

Germany

Principal Wireless Consultant

Technical University

Reviewed and redesigned a WLAN for WiFi 6E
Troubleshot RADIUS authentications
Configured APs for a high-density WLAN in an auditorium
Evaluated device roaming
Ekahau AI Pro site survey
Introduced 802.1X for lab networks using Aruba ClearPass and Mobility Conductor

Nov 2022 - Nov 2022

1 month

Germany

Principal Wireless Consultant

Software Development

Installed WLC9800-L in HA mode
Redesigned an existing WLAN for WiFi 6E
Configured WPA3 WLAN SSIDs
Troubleshot RADIUS authentications
AP configuration for high-density WLANs in offices
Evaluated client roaming
Ekahau AI Pro site survey for Cisco C9136i APs

Jun 2021 - Mar 2025

3 years 10 months

Principal Wireless Consultant

Retailer - Drug Store

AP layout and redesign of existing and new stores; predictive planning with Ekahau AI Pro
Redesigned WLAN solutions for voice-over-WLAN
Evaluated WLC configurations for 9800 series
Planned AP migration in offices, distribution centers and warehouses across DE, AT, HR, SK, IT, PL
Cisco WLC 5520 and 9800
Cisco AP 2802i series, C91xy APs, 4800i APs, Meraki MR36
Troubleshot WLAN device roaming
Ekahau AI Pro planning and site surveys
Evaluated roaming for mobile devices on iOS and Android
Redesigned WLAN for WiFi 6E in several stores using Meraki APs
Cisco DNA Center
Post-implementation site surveys in shops around Munich
Migration concepts for WiFi 6E in dense urban stores

Jan 2021 - Apr 2021

4 months

Germany

Senior Wireless, Mobility Consultant

IT Department

WLAN consulting
WLC configuration and RF design for logistics buildings
WLAN RF improvements
AP migration
WLC software upgrades and hardware migration planning

Dec 2020 - Nov 2022

2 years

Germany

Principal Wireless Consultant

Public Transport

RF redesign in Europe’s largest public WLAN, up to 600,000 devices daily
Redesigned WLAN in ICE train coaches
Troubleshot RADIUS authentication
AP configuration for high-density WLANs in trains and stations
Evaluated client roaming
Ekahau AI Pro measurements and NetAlly G3

Dec 2020 - Mar 2021

4 months

Switzerland

Senior Wireless Consultant

Psychiatry

Redesigned an existing WLAN
Designed AP layout for voice-over-WLAN
Evaluated several WLC configurations
Planned AP layout for 40+ locations across buildings
Cisco WLC 5520
Cisco AP 2802i series
Ekahau Pro

Aug 2020 - Nov 2020

4 months

Switzerland

Senior Wireless Consultant

IT Service Provider

Redesigned AP layout for a Swiss university
Evaluated Ekahau site survey measurements
Reconfigured a high-density WLAN for an auditorium
Proposed Cisco Meraki AP configurations
WLC v8.10.112.0
WLC 8410

Aug 2020 - Oct 2020

3 months

Germany

Senior Wireless Consultant

Engineering

General WLAN planning and simulation with Ekahau for bottling plants using Realwear HMT-1 and MS HoloLens 2
Evaluated Ekahau site survey measurements
Redesigned AP layout
Configured EWC for video-over-WLAN solutions
EWC v16.12 and v17.1

Aug 2019 - Dec 2022

3 years 5 months

Germany

Senior Wireless, Mobility Consultant

IT Department

WLAN consulting, WLC configuration and RF design for autonomous container vehicles in terminals to ensure roaming
WGB setup
Cisco WLC 9800-CL configuration
WLAN RF improvements, AP migration, software upgrades and hardware migration planning
Introduced PRP (Parallel Redundancy Protocol) in WLAN
PoC for Cisco Meraki APs in container terminals
Spectrum analysis in German terminals using R&S FPH6 for LTE-TDD and WLAN interference

Jan 2019 - Sep 2019

9 months

Germany

Senior Wireless, Mobility Consultant

IT Department

WLAN consulting and Cisco WLAN design
Client roaming topics
QoS for voice over wireless in high-rack storage and distribution centers
WLAN design for large data transfers (>20 GB) between parked and moving vehicles

Oct 2018 - Nov 2018

2 months

Germany

Senior Wireless, Mobility Consultant

IT Department

WLAN consulting and Cisco WLAN design, client roaming topics
QoS for voice over wireless
Global WLC architecture
Troubleshooting production WLAN issues
Cisco Prime, Cisco ISE

Jun 2018 - Aug 2019

1 year 3 months

Germany

Senior Wireless, Mobility Consultant

IT Department

Managed wireless topics during transition operations for a German car manufacturer
Troubleshot production WLAN issues

Aug 2017 - Nov 2017

4 months

Bonn, Germany

Senior Wireless, Mobility Consultant

IT Department

Designed, implemented and redesigned WLC clusters for 802.11ac high-density WLAN at COP23 in Bonn
Migrated FlexConnect APs from WLC 7500 to local-mode APs on WLC 5520
RF site surveys with Ekahau
Installed and ran Cisco Prime v3.1
Managed 28,000 concurrent WLAN clients during the Bonn COP event

May 2017 - Mar 2020

2 years 11 months

Senior Wireless, Mobility Consultant

IT Department

Redesigned WLCs across multiple countries for 802.11ac
Migrated from 5508 to 5520 WLC
Site survey measurements in production environments
Authenticated Win7, Win10 and iOS devices with ACS v5.8 and ISE (PEAP, EAP-TLS)
Migrated ACS to ISE v2.4, upgraded ISE to v2.6
Deployed ISE for 802.1X NAC for wired and wireless
Guest WLAN via ISE
Installed Cisco Prime v3.4–3.7
Low-cost iPerf performance tests with Raspberry Pi (wired and wireless)

Apr 2017 - Present

8 years 4 months

Weiherhammer, Germany

WLAN Service Provider

Skigau Werdenfels

Provided WLAN service at the biathlon stadium in Kaltenbrunn/Garmisch-Partenkirchen for DSC and DP competitions

Mar 2017 - Jun 2017

4 months

Germany

Senior Wireless, Mobility and Security Consultant

IT Department

Redesigned WLAN for a new campus with 802.11ac wave 2
Deployed wireless endpoints
Managed site surveys for production and office areas
Implemented authentication for employees and BYOD
Configured guest access and ran PoC for 802.11ac WLANs
Created templates for Cisco Prime Infrastructure v3.1
Radius server: Cisco ISE v2.1
MSE v8.0.140

Oct 2016 - Mar 2017

6 months

Germany

Senior Wireless, Mobility and Security Consultant

IT Department

Redesigned WLAN and evaluated 802.11ac wave 2 designs
High-density setup in a hospital auditorium
Deployed new AP and WLC hardware
Planned migration strategy
Employee and BYOD authentication
Cisco Prime Infrastructure v3.1
Radius server: Cisco ISE v2.1
CMX and MSE

Sep 2016 - Dec 2016

4 months

Germany

Senior Wireless, Mobility and Security Consultant

IT Department

Redesigned WLAN for a new campus with 802.11ac wave 2
Deployed wireless endpoints
Managed site surveys for production and office areas
Implemented authentication for employees and BYOD
Configured guest access and ran PoC for 802.11ac WLANs
Created templates for Cisco Prime Infrastructure v3.1
Radius server: Cisco ISE v2.1
MSE v8.0.140

Apr 2016 - Apr 2016

1 month

Senior Wireless, Mobility and Security Consultant

IT Department

TACACS+ authentication for multiple Cisco network devices
Guest WLAN access
Upgraded Cisco Prime to v3.0
Radius server: Cisco ISE v2.1

Nov 2015 - Aug 2018

2 years 10 months

Senior Wireless, Mobility and Security Consultant

IT Department

Redesigned an existing WLAN across four European countries for 802.11ac (~40,000 devices, 15,000 APs)
Managed site surveys for production and office areas
Authenticated employees and BYOD via ISE
Guest WLAN and PoC
Migrated multiple WLCs within a data center
Upgraded Cisco Prime to v3.x
Radius server: ISE v2.1–2.3
PoC for WLAN NAC

Sep 2015 - May 2016

9 months

Bonn, Germany

Senior Wireless, Mobility and Security Consultant

IT Department within a Bank

Redesigned and ran PoC for 802.11ac WLANs
Migrated WLC within data centers
Upgraded Cisco Prime to v3.0
Radius server: Cisco ISE v1.3
Cisco Prime Infrastructure 2.1, 2.2, 3.0

Jul 2015 - Oct 2015

4 months

Stuttgart, Germany

Senior Wireless, Mobility and Security Consultant

IT department

Redesigned and ran PoC for WLANs at a US racetrack, office WLANs for new/existing buildings and showrooms
Upgraded WLC and Cisco Prime
Radius server: Cisco ISE v1.2
Cisco Prime Infrastructure

Nov 2014 - Jul 2015

9 months

Munich, Germany

Senior Wireless, Mobility and Security Consultant

IT Department within a bank

Designed and PoC for banking WLANs using 802.11ac
Client authentication via 802.1X (EAP-TLS) per bank location
Deployed Meraki APs in remote sites
Radius server: Cisco ISE v1.3
Cisco Prime Infrastructure 2.1, 2.2

Nov 2013 - Oct 2014

1 year

Germany

On-site

Cisco Advanced Service, On Site Consultant

IT Service Provider

Designed, implemented and troubleshot WLANs across Europe
Redesigned according to Cisco best practices
RF analysis and optimization of industrial WLANs
Site surveys using Ekahau
PoC and implementation of EAP-TLS (802.1X) WLANs
Troubleshot with Cisco ISE and ACS 5.3
Packet analysis with Wireshark for workgroup bridge roaming
Drafted templates for Cisco Prime 2.0
Meraki AP RF planning

Nov 2013 - Jul 2014

9 months

Karlsruhe, Germany

Cisco Advanced Service Consultant

IT Service Provider within a Bank

Designed, PoC, implemented and troubleshot bank WLAN SSIDs in Germany
Client authentication by bank location
Radius server: Cisco ISE
LDAP/RADIUS auth for various network devices

Jan 2012 - Dec 2013

2 years

Traunreut, Germany

Senior Network Consultant

IT Department

Designed, implemented and troubleshot LAN and WLAN across multiple sites
Developed and rolled out operations and security concepts
IP redesign for L3 core and distribution layers
Data center solutions with Nexus 2000, 5000/5500, FlexPod
PoC and implementation of EAP-TLS WLANs with ISE troubleshooting
Designed and implemented Cisco ISE
PoC and WLAN implementation for scanners and devices (macOS, iOS, Win7, XP)
Migration planning from WCS to Prime
Baselined Cisco switch/router configs
Recommended Cisco hardware (switches, APs, WLCs) and IOS

Jul 2011 - Dec 2011

6 months

Germany

Senior Network Consultant

Different Customer Network in Germany

Designed, implemented and troubleshot LAN and WLAN networks
Developed and introduced ops and security processes
Data center solutions with Nexus 2000, 5000/5500 and FlexPod

Dec 2010 - May 2011

6 months

Zürich, Switzerland

IT Architect in Cisco Competence Center

IT Service Provider

Enhanced existing MPLS network environments for a public client (Canton Zurich)
Planned, designed, tested and implemented routing redundancy for two security gateways in an MPLS network
Created, lab-tested and implemented QoS for voice, video and data in the MPLS network
Developed and tested 802.1X WLAN concepts in a lab on Cisco
Planned and implemented VRFs and VLANs for various customer connections
Planned, coordinated and executed the relocation of two core sites

Nov 2010 - Nov 2010

1 month

Hungary

Senior Consultant

Car Manufacturer

Implemented and installed network solutions
Defined and enforced quality standards for strategy and architecture
Communicated the architecture

Jun 2008 - Jun 2010

2 years 1 month

Munich, Germany

Project Manager LAN Aktiv

BWI IT

Assessed current IT security and network state for data and telecom
Developed OSPF routing concepts
Planned VLANs and IP address schemes
Designed campus enterprise network structures per BSI basic protection
Created base configs and aligned client requirements with design guidelines
Coordinated installation with on-site client
Implemented routing changes for Layer 2 and 3
Troubleshot VoIP, data and multicast
Documented and handed over projects to operations
Maintained quality criteria and reported to project management
Planned all steps with MS Project Server in a hierarchical multiuser environment

Apr 2008 - Jul 2008

4 months

Switzerland

Consultant IT Security

Swisscom IT

Advised clients on technical security solutions, architectures and processes
Planned, coordinated with client and implemented solutions in a Check Point environment
Estimated resource needs

Feb 2008 - Mar 2008

2 months

Hanover, Germany

IT Bid Manager

T-Systems

Project lead for RFP on mobile, fixed-line, data networks and IT security services
Prepared tender documents
Supported presales delivery for proposals
Coordinated and created concepts and service descriptions
Aligned proposal content
Coordinated network concepts
Managed internal suppliers

Jun 2007 - Jan 2008

8 months

Frankfurt, Germany

IT Project Manager and IT Process Manager

Lufthansa Systems Infratec

Project management, process definition and automation for handovers from engineering to operations in the client’s data center, focusing on efficiency, lean processes and security
Created process specs and streamlined workflows for global handovers
Defined, built, aligned and implemented handover processes in the data center per ITIL, meeting quality, cost and timeline goals
Defined and introduced key performance indicators
Moderated project and alignment meetings
Reported on process development for the global data center relocation project
ITIL service support (incident & change management)
Coordinated network management systems (HP Network Node Manager, Nagios)
Aligned data sync processes with the CMDB (Peregrine Service Center)

Jul 2006 - Dec 2006

6 months

Ulm, Germany

Consultant

DaimlerChrysler AG, Research and Technology

Coordinated implementation and operational setup of a communication test system (CTS) for AM/FM, GPS and GSM for the new C-Class (W204)
Defined and implemented 2nd-level support activities and processes per ITIL, coordinating production, maintenance and supplier teams
Coordinated CTS enhancements for new services (Keyless-Go, DAB, TV, SDARS)
Adapted CTS to different vehicle models
ITIL service delivery (SLM) and support (incident) processes

Jan 2006 - Feb 2006

2 months

Munich, Germany

Interim Project Manager

Consulting Company

Management consulting and process optimization
Reported to management
Supported achievement of outsourcing KPIs
Staff leadership and recruiting
Coordinated, trained and led short-term interim control
Defined and created OEE metrics per Six Sigma
Created dashboard visuals for outsourcing targets

Jan 2003 - Dec 2005

3 years

Weßling, Germany

Senior Systems Engineer

Systems Engineering and Support Services GbR

Coordinated, reported, designed, planned, implemented, documented and managed suppliers for a global IP data network on ISS Columbus module using Cisco components
Developed, designed, planned, coordinated, executed and documented IP networks for data, voice and multicast
Created OSPF routing concepts
Conducted pre-installation site acceptance tests
Coordinated node installations with ESA partners (NASA, RSA)
Configured and troubleshot Cisco routers, switches and firewalls
Developed operations, maintenance and disaster plans for the Cisco IP network
Designed, planned, coordinated, executed and documented end-to-end system acceptance and load tests
Planned, coordinated and documented software acceptance and upgrade tests
Coordinated subsystems in Columbus ground segment
Defined and aligned ground operations processes and procedures
ITIL support processes: release, change and problem management
ITIL delivery processes: availability and service level management

Oct 2001 - Nov 2002

1 year 2 months

Munich, Germany

Lawful Interception Specialist

Quam Group 3G GmbH

Assessed new services for lawful interception
Planned technical requirements for surveillance under German Telecommunications Act § 88
Managed suppliers
Coordinated surveillance planning with the telecom regulator
Held technical responsibility during contract negotiations for voicemail software to meet interception requirements

Oct 2001 - Nov 2002

1 year 2 months

Munich, Germany

Operations and Maintenance Specialist

Quam Group 3G GmbH

Planned IT network management systems
Deployed HP OpenView and CiscoWorks for the Operations and Maintenance Centre per Telefónica requirements
Prepared RFI and RFQ for network tech
Supported procurement in technical contracting
Managed suppliers

Oct 2001 - Nov 2002

1 year 2 months

Munich, Germany

Release Manager Networks

Quam Group 3G GmbH

Project reporting and management at director level
ITIL service support: release management
Coordinated network feasibility studies for new product requirements
Aligned feasibility analyses with network leadership
Coordinated all network studies with marketing and IT
Created network-marketing-IT release process

Oct 1998 - Sep 2001

3 years

Munich, Germany

Network Planning Engineer

VIAG Interkom GmbH

Defined BSS planning guidelines and BSC dimensioning
Managed suppliers
Led BSS software planning projects
Managed system tech upgrades and swaps
Developed RFI/RFQ and vendor negotiations for GSM/GPRS/UMTS BSS and UTRAN hardware and software
ITIL delivery: capacity management
ITIL support: release and configuration management
Designed and defined processes
Internal customer management
Led technology working groups
Represented the group leader

Jul 1996 - Sep 1998

2 years 3 months

Munich, Germany

GSM Radio Network Planner

Mannesmann Mobilfunk GmbH

Planned GSM networks by capacity and coverage for a regional area
Familiar with Siemens and Ericsson base station technologies and planning criteria
Technical lead for special radio network planning project at Munich Airport

Summary

Comprehensive project experience in the area of enterprise networks, whether wired or wireless
Specialized in wireless local area networking (WLAN) radio frequency issues
Troubleshooting RF-related problems in complex environments
Consulting, design, proof of concept, implementation, operations and troubleshooting of complex enterprise WLAN networks
WLAN site surveys across various industries using tools like Ekahau, Hamina, Wireshark, Sidos, Netally
Enterprise Local Area Network (LAN) experience since 2001
Enterprise Wireless Local Area Network (WLAN) experience since 2012
Consulting experience since 2001
Proven track record of solving WLAN issues in complex RF environments
WLAN RF planning and optimization for office buildings, warehouses, container terminals, trade fairs, factory buildings, distribution centers and high-speed train carriages
Network operations for multiple WLCs and up to 20,000 access points in sectors like automotive, distribution centers and trade fairs
AP layout planning for seamless roaming regardless of hardware vendor or SSID security
WLAN planning for high-density environments at trade fairs, higher education institutions, universities and public hotspots
PoC, design and implementation of Cisco Software Defined Access Networks based on Cisco Catalyst Center