Axel D.
Network and Security Expert
Experience
Aug 2024 - Present
1 year 1 monthBerlin, Germany
Instructor for IT specialist courses
Cimdata
Jan 2022 - Nov 2022
11 monthsMunich, Germany
Proxy / PAC file changes
NTT / large company in Munich
- Reflected proxy infrastructure changes in the central PAC file
- Planned and executed changes
- Tested in the production environment
May 2020 - Sep 2020
5 monthsInfrastructure project
Tata TCS / Postbank Systems
- Migrated proxies from McAfee Web Gateway and Squid by reconfiguring the proxy settings
- Updated configuration documentation
Oct 2015 - Nov 2019
4 years 2 monthsDietzenbach, Germany
RemoteManaged Services
Controlware
- Managed services for operating remote customers' security infrastructures
- Troubleshooting, performance analysis, consulting, configuration, 3rd level support:
- Symantec/Bluecoat Proxy/Reporter/CAS/Mgmt Center/Symantec Cloud Proxy
- Symantec Bluecoat proxies/Bluecoat Reporter/CAS/Mgmt Center/Symantec Cloud Proxy
- Managed services for operating corporate customers' security infrastructures:
- Performance analysis, consulting, configuration, 3rd level support
Jun 2015 - Sep 2015
4 monthsMunich, Germany
3rd Level Support Configuration Changes
Dimension Data / large company in Munich
- Bluecoat Proxy Cluster, Bluecoat Director, Bluecoat CAS, Bluecoat Reporter.
Oct 2014 - Dec 2014
3 months2nd Level Support and Configuration Changes
Dimension Data / Merck
- 2nd Level Support and Configuration Changes: Bluecoat proxy clusters, Bluecoat AV
- F5 Load Balancer LTM (Big IP) Configuration
- HP Service Center / Incidents and Changes (ITIL)
Jun 2014 - Aug 2014
3 monthsRemote
NOC Engineer
Dimension Data GSC
NOC Engineer for Remote Monitoring and Troubleshooting of two large Cisco networks
Cisco switches, management of the WLC with Cisco Prime and the access points with RADIUS (ACS), operation with HP Service Center, Cisco Prime, ISE, ACS/RADIUS, NMS Solarwinds
Monitoring, fault resolution, operation with incidents and changes according to ITIL
Configuration of Cisco Systems network components
Network management & monitoring (Solarwinds, Cisco Prime)
Feb 2014 - May 2014
4 monthsOn-site
Onsite Engineer for Proxy Systems and Firewalls
Dimension Data /Steag Energy Services
- Engineering and operation of multiple Bluecoat proxy clusters, Bluecoat AV, Bluecoat Reporter, Bluecoat Director
- Configuration of Cisco ASA firewall clusters
- Use of Cisco Prime network management system, Cisco ISE, problem documentation in ticket system (ITIL)
Jan 2006 - May 2013
7 years 5 monthsNetwork Security
AGIS - IT Subsidiary of Allianz AG
- Troubleshooting of the security infrastructure (McAfee Web Gateways, Checkpoint firewalls, Bluecoat proxies, reverse proxies, IBM IDS systems, McAfee Webwasher)
- Change and incident management in Service Center (ITIL)
- Overall responsibility for security components/checkpoint firewalls, Bluecoat proxies, security gateways
- Design and implementation of the distributed infrastructure of Bluecoat forward proxy clusters
- Design and implementation of the infrastructure for multiple Bluecoat reverse proxy clusters
- Design and proxy implementation for email access of mobile clients
- Participation in the network segregation project of Dresdner Bank/Commerzbank from Allianz network
- Network planning and security infrastructure planning
- Expansion and support of Microsoft ISA/TMG proxy frontend infrastructure for email connections of international subsidiaries
- Dedicated connections of international clients and subsidiaries to proxy infrastructure
- Creation and enforcement of standards: DMZ guidelines and security specifications
- Dedicated connections of international clients and subsidiaries to the security infrastructure
- Introduction and expansion of forward proxy cluster infrastructure for banking and insurance
- Deputy head of network management department
- Expansion of network and configuration management of network components
- Pilot project Allianz AMIS field network: installation and testing of an encrypted, automated configuration management of 9000 access routers
- Router configuration management solution for security-critical DMZ servers
- Performance monitoring tools for secure VPN solutions
Jul 2000 - Present
25 years 2 monthsTeam Lead for Network Management
DREGIS of Dresdner Bank
- Team lead for network management of the Dresdner Bank Group IP network
- International fault/performance management for service centers in Singapore, London, New York
- Configuration management for routers/switches
- Fault and configuration management for hubs
- Establishment of system administration for network management servers
- Distributed fault management with HP OpenView for network monitoring in DMZ environments
Jul 2000 - Jan 2003
2 years 7 monthsDeputy Project Manager / Team Lead Network Management
Dregis
- Deputy project manager: integration management of network management for Dresdner Bank / Dregis
- Use of products for umbrella and service management
- Integration of ATM fault management NORTEL NMS into umbrella management Tivoli / Netcool
Jan 1997 - Jul 2000
3 years 7 monthsFrankfurt, Germany
2nd Level Support
Dresdner Bank IT
- 2nd level support for local IP networks on the Frankfurt campus and branch offices
- 2nd level support for the national and international IP network for routers and switches
- Configuration of network components from Cisco Systems
- 2nd level support for firewalls
- Implementation of Ethernet LAN analyzers and RMON probes
Aug 1995 - Dec 1996
1 year 5 monthsHeidelberg, Germany
Network Administration
University of Heidelberg Data Center
- Network administration, university campus
- Cisco routers, switches, hubs
Aug 1994 - Jan 1995
6 monthsFrankfurt, Germany
LAN and Router Administration
Degussa AG
Apr 1990 - Jun 1994
4 years 3 monthsHeidelberg, Germany
Administrator / Programmer
Kraftanlagen Heidelberg AG
- Setup and administration of the Ethernet campus
- ADABAS database and system administration
- Natural database programming
Mar 1989 - Mar 1990
1 year 1 monthProgrammer / System Manager
GST-DATA GmbH
- Programming in COBOL/Oracle database, DEC/VMS system management
Summary
I am a network and security expert with decades of hands-on experience in network administration, security infrastructure, and managed services. I have built and maintained secure network environments for large international organizations, teaching and implementing proxy, firewall, and VPN solutions while ensuring smooth configuration changes and efficient problem resolution.
I have a deep understanding of Cisco and Bluecoat products, along with strong ITIL and security management skills. Over my extensive career, I have consistently delivered reliable network security, managed complex infrastructures, and handled detailed technical implementations that improved performance and operational stability.
Languages
German
NativeEnglish
AdvancedEducation
Nov 1983 - May 1985
Lorem ipsum dolor sit amet
Second state exam · High school teaching, Mathematics/Social Studies · Germany
Oct 1975 - Jun 1983
University of Kassel
First state exam · High school teaching, Mathematics/Social Studies · Kassel, Germany
Certifications & licenses
Cisco CCNA Security
Cisco
Symantec BlueCoat Proxy Troubleshooting for Partners
Symantec
Symantec Bluecoat: Proxy Administration & Professional
Symantec
Cisco CCNA Routing and Switching
Cisco
ITIL Foundation
Cisco IDS Specialist
Cisco
Cisco Firewall Specialist
Cisco
Cisco VPN Specialist
Cisco
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