David Killian Email & Phone Number

Herndon, Va, Us

Herndon, Virginia, Us

Troubleshot LAN and WAN connectivity issues by analyzing packet captures with Wireshark. Implemented advanced routing protocols including BGP and OSPF for complex network designs.Designed and Implemented adoption of 802.1X within infrastructure through Cisco ISE.Prepared technical proposals for leadership team to to implement QoS and improve availability to the customer network.Analyzed traffic patterns and utilized SolarWinds Orion for monitoring purposes.Redesigned routing configuration to improve security posture by migrating from a ROAS network design.Developed innovative solutions for customer networks that improved the availability of critical resources by over20%.Managed and configured Cisco Firepower Threat Defense (FTD) firewalls.Troubleshot issues with both VOIP and VTC technologies and managed Cisco Unified Communications Manager (CUCM).

Arlington, Virginia, Us

Installed and performed upgrades to Cisco IOS-XE and NX-OS operating systems and other application software.Completed an entire network hardware refresh of over 30 networking devicesCreated and architected a new network enclave to service users in the organizationOperated installed and configured General Dynamics KG175 encryption devices to provide connectivity across three separate enclaves.Implemented network security measures to protect data, software, and hardware as outlined by DISA on STIGs.Configured, installed, and licensed Cisco ISE on multiple enclaves to greatly improve network management.Supported design, installation and maintenance of computer systems and networks on both NIPR and SIPR Army networks.Led and trained a network team of 5 and familiarized the team with the environment and architecture.Managed both Cisco Catalyst and Cisco Nexus series switches.