Summary
Overview
Work History
Education
Certification
Software
Network Hardware Experience
References
Timeline
Generic

Joon Lee

Gunsan,45

Summary

Dedicated Network Administrator with a strong focus on resolving technical issues to ensure maximum uptime and enhance organizational productivity. Committed to continuous learning and skill development to grow within the IT infrastructure field.

Overview

16
16
years of professional experience
1
1
Certification

Work History

Network Specialist

Tyto Athene (Kunsan AB)
08.2024 - Current
  • Provided daily operational support for the LAN core and edge switches across the medical network campus.
  • Resolved technical issues associated with network and routing protocols at all levels of the OSI model utilizing diagnostic and network administration tools.
  • Provides overall network infrastructure support to routing and switching equipment, firewalls, and associated cabling.
  • Planned, installed, and supported hardware and software upgrades, and resolved associated technical issues.
  • Monitored system logs for devices to track uptime.
  • Performed configuration of Cisco switching platforms.
  • Performed network security procedures, including STIG Compliances and adhered to best security practices.
  • Performed other duties, administrative tasks, and assignments as required.


Network Administrator

Vectrus (Camp Buehring)
08.2023 - 06.2024
  • Performed the maintenance and operations of switches, routers, and encryption devices.
  • Monitored the availability and reliability of LAN/WAN systems to ensure optimal performance.
  • Provided technical support for LAN/WAN connectivity, VoIP networks, and user interface issues.
  • Managed VLAN administration and configured ACLs.
  • Ensured outages and corrective actions were promptly reported to the OIC, Site Manager, Regional Network Operations Center, and Regional Cyber Center-Southwest Asia.
  • Enforced network security procedures, including DISA STIG Compliance and adhered to best security practices.
  • Performed other duties, administrative tasks, and assignments as required.

Managed Network Services Administrator

AHEAD (Scottsdale, AZ)
07.2019 - 07.2023
  • Ensured the rollout of security updates across enterprise network cloud solutions for Mitsubishi UFJ Financial Group (US). 
  • Confirmed the accurate tracking of network syslog and events for all assigned Network and Server environments. 
  • Successfully completed firmware updates within the designated change windows to allow maximum availability of customers production environments. 
  • Administered manual remediation during after-hours for network devices that required additional support. 
  • Consistently communicated status updates to users, stakeholders and the management team during major change maintenance and unplanned outages. 
  • Coordinated with cross-functional teams to identify process gaps and solutions.
  • Monitored servers, networks and storage devices on a 24/7 rotation schedule. 
  • Provided first-call network resolution for clients in the gaming, law enforcement, marketing, and medical industries. 
  • Followed established escalation procedures to expedite necessary repairs. 
  • Generated daily, weekly, and monthly network progress reports for management and customer visibility. 
  • Maintained Standard Operating Procedure (SOP) documents for training and reference. 
  • Oversee onboarding, training, and credentialing for new hires to ensure successful integration into the Network team. 
  • Completed training programs and acquired certifications as requested by the management.


Network Operations Analyst

Bank of Hawaii (Honolulu, HI)
10.2015 - 06.2019
  • Provided technical support for various business units, along with 24/7 on-call assistance. 
  • Resolved network software and hardware issues in adherence to the Service Level Agreement (SLA). 
  • Updated Core, Distribution, and Edge network devices with the latest gold version firmware to maintain industry standard security posture. 
  • Participated in planning and testing for Network Disaster Recovery, including the setup of fail-over systems, hot and warm sites. 
  • Collaborated with IT Security to ensure compliance with Sarbanes-Oxley (SOX) standards. 
  • Generated and reviewed monthly federal audit reports.
  • Completed designated project sand special assignments ahead of schedule. 
  • Maintained Standard Operating Procedure documents for training and reference. 
  • Completed training programs and acquired certifications as directed by the leadership.


Network Specialist (Voice)

Anthology Marketing Group (Honolulu, HI)
12.2012 - 09.2015
  • Addressed general hardware, software, and network issues. 
  • Provided support for the VOIP phone systems (SIP/Avaya) utilized by all business units. 
  • Managed active user accounts and administered privileges in Active Directory. 
  • Configured VOIP and Virtual Teleconference Systems for end users.
  • Tracked and maintained software/firmware version of Cisco Unity Call Manager to maintain industry standard security posture.


IT Specialist

Infinitech (Honolulu, HI)
08.2009 - 11.2012
  • Provided technical support to end-users for hardware, software, and network issues. 
  • Evaluated and applied routine hardware, software, and server updates. 
  • Installed, configured, and upgraded computer systems, software, and peripheral devices. 
  • Maintained inventory of assets while ensuring proper documentation. 
  • Assisted Systems Engineers in making small administrative changes in AD, DHCP, DNS, GPO. 
  • Provided training for new customers, improving their productivity and efficiency.


Education

Bachelor in Science in Information Technology -

University of Phoenix
Online Campus

Associate in Applied Science - Information Technology

Heald College
Honolulu, HI
04-2014

Certification

Active Secret Clearance


Cisco Certified Network Associate


Comptia Security+


Comptia Server+


Microsoft Modern Desktop Administrator Associate


VMware NSX-T Data Center


PeopleCert ITIL Foundation v3 Foundation

Software

JIRA, ServiceNow, BMC Remedy, iRequest

LogicMonitor, Solarwinds, Splunk

Intune, SCCM

Microsoft Office, Office365 (Word, Excel, Outlook, Sharepoint), Adobe Creative Cloud

Microsoft Azure, VMware Horizon, Citrix VDI, Amazon AWS, MS RDP
Microsoft Windows Server 2003, 2008, 2008 R2, 2012, 2012 R2, 2016, 2019
Microsoft Windows 10, Windows 11
Microsoft Teams, Skype for Business
Avaya, Cisco Unified Communications Manager
Wireshark, TCPDUMP, GNS Packet Tracer
Active Directory, DHCP, DNS, TCP/IP, WSUS

Network Hardware Experience

  • Cisco 5508 Wireless LAN Controller
  • Cisco Catalyst 6507 and 6509 Chassis
  • Cisco Catalyst 3850’s, 9300's and 9500’s series switches
  • Cisco ASR 1000 Series Routers
  • Brocade 6110 & 7450 Ruckus switches
  • Palo Alto 5050 Series Firewall
  • Cisco ASA 5510

References

Joseph Chang Network Engineer TYTO Athene 657.246.2870

Thomas McDonald  Manager Infinitech 808.225.4980
Dylan Lopez  Patch Engineer AHEAD | MUFG Americas 602.739.6718
Danny Gallegos  Former Manager Anthology Marketing Group 808.224.6849
More reference available upon request.

Timeline

Network Specialist

Tyto Athene (Kunsan AB)
08.2024 - Current

Network Administrator

Vectrus (Camp Buehring)
08.2023 - 06.2024

Managed Network Services Administrator

AHEAD (Scottsdale, AZ)
07.2019 - 07.2023

Network Operations Analyst

Bank of Hawaii (Honolulu, HI)
10.2015 - 06.2019

Network Specialist (Voice)

Anthology Marketing Group (Honolulu, HI)
12.2012 - 09.2015

IT Specialist

Infinitech (Honolulu, HI)
08.2009 - 11.2012

Bachelor in Science in Information Technology -

University of Phoenix

Associate in Applied Science - Information Technology

Heald College

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