Experience
Jun 2022 - Present
3 years 4 monthsLudwigsburg, Germany
Remote
- Network segmentation in the production IT environment
- Firewall migrations
- Integration of remote access sites
- Implementation of POCs (backup, SCADA)
- Working in a multicultural environment
- Technologies used: Panorama & Palo Alto Firewalls, Checkpoint, ServiceNOW, MS Azure Cloud
May 2020 - Jun 2024
4 years 2 months
- Network segmentation
- Firewall rule concepts
- Redesign and optimization of FW Rule Bases
- Execution of carve-outs
- Working in a multicultural environment
- Technologies used: Palo Alto Firewalls and Panorama Management, Palo Alto GlobalProtect, User-ID, App-ID, Cisco ASA, ServiceNOW, MS Azure Cloud
Nov 2019 - Present
5 years 11 months
- Development of network and firewalling concepts
- Vendor management
- IP address schema
- Optimization of network infrastructure
- Site-to-site VPN
- Client VPN
- Service provider management
- Technologies used: Palo Alto Firewall, Sophos UTM, Juniper Switching, Jira, Confluence, atruvia
Jan 2017 - Jun 2020
3 years 6 months
- LAN, WLAN, IPSec VPN, WAN
- On-call duty
- Vendor management
- Emergency drills
- 2nd- and 3rd-level support
- Reporting, monitoring
- Creation of network documentation and user manuals
- Inventory
- FW migration and virtualization
- Datacenter infrastructure
- Working in a multicultural environment
- Technologies used: Datacenter, Cisco Catalyst/Nexus, Stonegate/Forcepoint, Fortinet/Fortigate & FortiManager, Palo Alto Firewalls and Panorama Management, Checkpoint Nokia IP & VSX, SmartOne, F5 Load Balancer, Infoblox, SSL VPN, OTRS, Jira, Microsoft Visio, Remedy, ServiceNow, Cisco ACS
Nov 2012 - Dec 2016
4 years 2 months
- Datacenter operation, management, and documentation of various customer setups
- Monitoring
- 2nd- and 3rd-level support
- Vendor management
- On-call
- FW reporting
- Migration of various FW systems and virtualization
- Software update management
- Threat management
- Technologies used: Juniper Netscreen/ISG/SRX, Junos, Sophos UTM/Astaro, Palo Alto Firewalls and Panorama Management, Checkpoint, Fortigate and FortiManager, PfSense, firewall virtualization, SSL VPN, OTRS, Jira, tcpdump, Datacenter
Jul 2012 - Oct 2012
4 months
- Cross-country integration of various medical devices into the Siemens environment
- Troubleshooting (network, firewall)
- Working in a multicultural environment
- Site-to-site VPN management
- 2nd Level Support
- Applied technologies: Cisco, IPSec VPN, Lancom, Multivendor
Sep 2011 - Jun 2012
10 months
- Administration of site-to-site and client VPN
- Maintenance of firewall rulesets
- Token Management
- Configuration of network devices
- 2nd level support
- Applied technologies: Checkpoint, Juniper, Cisco, IPSec VPN, SSL VPN, RSA, ACL, CBAC, FW Monitor, tcpdump, VRF
Jul 2010 - Jan 2011
7 months
- Firewall & proxy management (new installations, configuration, troubleshooting)
- 2nd Level Support
- SIEM
- Applied technologies: Squid, Microsoft ISA, Webwasher, McAfee, IBM Siteprotector, ArcSight, HP OpenView, IPSec VPN, Checkpoint, Cisco ASA, tcpdump, fw monitor, SIEM
Jan 2010 - Jul 2010
7 months
- Customer management
- Troubleshooting (switches, routers)
- 2nd Level Support
- Applied technologies: Cisco, IPSec VPN, TACACS+, RADIUS, ACL
Dec 2005 - Dec 2009
4 years 1 month
- Management of LAN, WLAN, WAN
- Monitoring
- Documentation
- User Manuals
- 1st, 2nd, 3rd Level Support
- Multisite VPN
- Applied technologies: Cisco & HP Networking, IPSec VPN, RADIUS, Microsoft AD (Win2003), Debian Linux, Cisco PIX/ASA, OTRS, QoS, Nagios
Apr 2004 - Dec 2005
1 year 9 months
- System administration
- Network device management
- Installations and configurations of server systems and clients
- Administration of Linux-based firewalls
- Applied technologies: Microsoft Active Directory, Windows 2003, Linux, Novell DS, Iptables, MS ISA, Cisco, Linksys