Peter Seungjoon Oh

• Led enterprise-wide Cisco IOS upgrade projects • Administered Cisco ASA firewalls supporting secure enclaves • Provided Tier 3 escalation support for routing/security incidents • Participated in Change Advisory Board (CAB) reviews • Validated post-implementation performance and stability

• Supported secure CONUS network modernization initiatives • Configured and maintained OSPF routing environments • Implemented ASA firewall rule updates and NAT policies • Resolved complex Layer 2/3 routing failures • Supported secure change execution in classified environments

• Performed secure IOS upgrades using Cisco ISE • Monitored network performance via SolarWinds • Supported outage resolution and performance tuning

• Performed switch migrations from legacy network equipment to modernized switching platforms, Foundry and Brocade, Juniper ex 4300 and 4200, and Foundry old devices to new Cisco 9300 and 9500 • Physically rerouted fiber interconnects for uplink trunk ports between access and distribution switches • Configured Cisco Catalyst 9500 and 9300 series switches for network connectivity at all 2 layers 3 layers

Installed and maintained network systems for clients. Site survey, find out uplinks trace and connection trace (tool razor, fluke with toner) Working at customers site at JBAB Monitoring with SolarWinds Troubleshoot customer service are ticket base and phone call Implemented Cisco router/switch design, configuration, maintenance, and IOS upgrades

• Performed switch migrations from legacy network equipment to modernized switching platforms, Cisco, Juniper and Foundry old devices to new Cisco 9300 and 9500 • Physically rerouted fiber interconnects for uplink trunk ports between access and distribution switches • Configured Cisco Catalyst 9500 and 9300 series switches for network connectivity at all 2 layers 3 layers • Troubleshoot customer service are ticket base and phone call • Implemented Cisco router/switch design, configuration, maintenance, and IOS upgrades • trouble-shoot most problem connection issues resolved vlan issue, sticky mac address, add new mac address and vlan or down site visit to find out issue some cross cable ...etc • Site survey, find out uplinks trace and connection trace (tool razor, fluke with toner)

National Geospatial-Intelligence Agency, Geo-names Manages the data integrity and imports native source data into the NGA’s Geographic Names Database (GNDB) Provides transliterations utilizing the approved Romanization system for native sources in: South Korea and North Korea Provides linguistic and native region support to the US Board on Geographic Names, the Foreign Names Committee, the Intelligence Community and DOD customers

Technical Support Specialist at US Army

Construct fighting positions and repaired bridges as well as operating Heavy Machinery, obstacles, and defensive positions. Place and detonate explosives. Conducted operations that included route clearance of obstacles and rivers And Prepare and install firing systems for demolition and explosives. Detected mines visually or with mine detectors. Also skilled in Painting, construction work,

Upgraded them when needed to repair computer hardware. Aided employees with any technical concerns. Tested and integrated new software identified and executed any corrections. Proactively participated in weekly team meetings with the senior manager. Using my own knowledge and judgment, troubleshot and resolved any users' network and connection issues. Communicated with clients via email and/or telephone; provided extraordinary customer service. Collaborated with the Operations team to develop and implement new procedures which increased and significantly improved workstation and operating systems

Accounting