Network and Security Engineer

12/2020 – 12/2022

• Responsible for day-to-day Operations and administration of network & security infrastructure.
• Perform Installation, configuration and maintenance of network equipment and network operating System.
• Responsible for network design and security particularly troubleshooting and/or debugging network related problems.
• Troubleshooting, problem identification, problem resolution and/or resolution recommendation activities to first- and second-level teams.
• Managing of Cisco Security devices; ASA appliance 5555-X and 5585-X, Palo alto, Juniper Net screen & (including virtual firewall contexts), Checkpoint Firewall.
• Managing of Cisco Data & Security Devices; ASDM, CSM, and DCNM.
• Managing of Servers; AAA, SNMP, Syslog, NTP, DHCP, FTP, DNS, IPS, VPN, AAA, DNS, DHCP, load balancers.
• Managing of Cisco Routers and Switches Catalyst 6500,4500,3750,2960 & 3560 Series.
• Managing of Alcatel Switches Omni Switches 6850 & Omni Switch 9000.
• Managing of TACACS+, Radius, and Cisco Access Control System.
• Network consulting for new projects.
• Implementation of new solutions and risk mitigation techniques.
• Receipt, evaluation, and implementation of inbound Network Access user and device provisioning/de-provisioning service requests.
• Managing Wireless Environment with WLAN Controller.

Netzwerkadministration (allg.)

7/2019 – 12/2020

• Managing Network Devices such as firewalls, Router, switches, WLC, Access Point, NAC, Load balancers, Etc (Cisco, F5, FortiGate, Checkpoint, Palo Alto, Aruba).
• Change implementation requests (GRE tunnels, IKEv2, SVI, VLANs, WLANs, Trunks, EtherChannel, Router & switch configuration, OSPF, Firewall rules, tacacs, radius, SNMP etc)
• AP management in WLC. Troubleshooting of wireless issues
• Applying firmware and IOS upgrades to (Routers, switches, WLC, Firewalls, ClearPass etc)
• Monitoring and managing Network devices through SolarWinds.
• Managing Network Access Control through Aruba ClearPass.
• Generating WAN utilization, bandwidth reports from SolarWinds.
• Managing IP schema for DHCP scope and SVI.
• End user support through ticketing system for LAN, WLAN and IP telephony
• Updating network diagrams by MS Visio.
• Liaising with vendors for troubleshoot, RMA and logging trouble tickets.
• Support power shut down, Disaster Recovery activities.

Netzwerk-Sicherheit, Netzwerkadministration (allg.), WLAN (Wireless Local Area Network)

12/2018 – 12/2019

• Implementing, troubleshooting and maintaining Enterprise Network.
• Managing CISCO Routers & Switches (Catalyst 6500, 4500, 2960, 3560, 3750 etc)
• Implementing change requests (SVI, VLAN, Trunks, DNS, DHCP, VS in F5, new AP mounting and managing in WLC, switch configuration, IPsec tunnels creating, OSPF, bluecoat rules implementation)
• Managing f5 load balancers. Creating VS in f5 LTM. Troubleshooting.
• Bluecoat proxy management. Monitoring and managing the policies.
• Managing Infoblox for DHCP and DNS requests (DHCP scopes, Forward & Reverse look up zones in DNS, Static IP etc.)
• Planning, upgrading and participating in network implementation.
• Engaging with project Managers to document all efforts and adhere to project schedules.
• Engaging with vendors and contractors for troubleshoot and management issues.
• Customizing and performing UAT (User Acceptance Testing) for Enterprise Network for the projects.

Cisco Switch, Firewalls, Fortigate Firewalls, Load Balancing / Lastverteilung, Netzwerkadministration (allg.), Router