Open To Work
Jacob Wonho Jung
Sterling Heights
Summary
Dynamic Information Systems Security Officer with extensive experience at United States Army Signal Corps, excelling in network security and risk management. Proven ability to implement NIST frameworks and develop cybersecurity policies. Adept in Active Directory administration and fostering team collaboration, ensuring robust protection of automated information systems.
Overview
28
28
years of professional experience
1
1
Certification
Work History
Information Systems Security Officer
General Dynamics Land Systems
Sterling Heights
02.2024 - 11.2025
- Monitors and manage the implementation of the National Institute of Standards and Technology (NIST) Information Assurance (IA) Risk Management Framework (RMF) on Enterprise Mission Assurance Support Service (eMASS).
- Review risk assessments and analyze the impact of potential vulnerabilities.
- Performs appropriate monitoring and scanning of network resources, utilizing approved DoD approved scanning and security tools, to ensure the network is being used IAW applicable DCSA directives.
- Research, develop, and establish local policies and procedures on Cybersecurity following Federal laws, Executive Orders, Department of Defense, and General Dynamics Land Systems directives and regulations.
- Received guidance from and worked in conjunction with the GLDS Cybersecurity Information System Security Manager (ISSM), C5ISR, DCSA, and ARCYBER in the protection of the Network and automated information systems.
- Prepares, distributes, monitors, and maintains plans, instructions, guidance, and standard operating procedures (SOPs) on the security of automated information system operations.
- Provides guidance and coordination for support during DoD inspections, to include Cyber Operational Readiness Assessments (CORA).
- Verify and validate users' Cyber Training for Account creation for Identity, Credential, and Access Management.
Signal Support Systems Specialist
United States Army Reserve
04.1998 - Current
- Manage computer and radio system operations for over 100 end-users at the Army Reserve Center.
- Managed users and computer accounts on Microsoft Active Directory, and created and maintained profiles for security and group policies on Microsoft Active Directory.
- Maintain company SharePoint website for easy data sharing.
- Responsible for providing 24/7 communication connectivity and service using Single Channel Ground to Airborne Radio Systems (SINGARS) Radio, Telephone Systems using Cisco VOIP Phones, and DoD approved Computers.
- Set up VSAT (Very Small Aperture Terminal) for remote ISP via satellite and intergrading wireless network for remote sites.
- Maintain and secure military equipment and sensitive items valued at more than $4M with zero losses.
- Identified automation equipment (computers, servers, and IP phones) for lifecycle; evaluated requirements and cost-efficient approach to distributing replacement equipment.
- Set up, maintain, and manage field expedient sever stack using Windows 7, Windows Server 2008, and Ubuntu 10.14 Server Edition operating systems integrated with Microsoft VM Suite or Oracle VM Ware. (vSphere Hypervisor 4.1)
- Troubleshoot and repair signal-related communication equipment. (Radios, computers, and phones).
- Provides supervisor with detailed information relative to assignments including accomplishments, technical barriers, questions of policy or procedures, and problems encountered and resolved.
- Conducts required information assurance reviews and audits IAW guidelines established by the directing authority.
- Maintains Cybersecurity training credentials utilizing the ATCTS database.
- Verify and validate users' Cyber Training for Account creation for Identity, Credential, and Access Management.
- Subject matter expert in troubleshooting and resolving network issues.
- Various Global Locations
Information Assurance Security Officer
United States Army Reserve
El Paso
11.2022 - 11.2023
- Coordinate with Mobilizing/Deploying Units arriving at Fort Bliss for their IT/Automation needs.
- Provide IT/Automation systems solutions for Mobilization Force Generation Installation (MFGI) expansion projects.
- Provide desktop computer support, including diagnosing and resolving any workstation operating system software, application software, or hardware problems.
- Conducts required information assurance reviews and audits IAW guidelines established by the directing authority.
- Maintains Cybersecurity training credentials utilizing the ATCTS database.
- Verify and validate users' Cyber Training for Account creation for Identity, Credential, and Access Management.
- Various Global Locations
IT Specialist
Defense Contract Management Agency
Detroit
03.2022 - 10.2023
- Provided critical Service Level I and II support as the IT subject matter expert within the IT Directorate, Field Services Center supporting agency operations in assigned region/sector.
- Served as senior technical specialist within the assigned organization providing technical project management and assistance in the planning, delivery, and management of customer IT support services.
- Served as the Subject Matter Expert (SME) on the local infrastructure, network and system administration, desktop hardware, software, peripherals, and communication devices.
- Provided Global Service Center (GSC) support to maintain service level objectives; maintains up-to-date knowledge of Enterprise system and network status to facilitate effective resolution to customer issues.
- Managed the LCM program within the assigned organization developing hardware requirements, plans, and schedules for the deployment.
- Served as the property custodian for the assigned organization managing all property transactions including hand receipts, equipment transfers, and annual physical inventories.
- Performed Information Assurance Security Officer Level II duties. Coordinates the day-to-day and emergency infrastructure, system, desktop, and information assurance problems.
- As the local SME to develop, test, and deploy specific packages, patches, and upgrades to maintain the Enterprise's Information Assurance posture.
- Scheduling and coordinating tasks related to the project.
- Conducted IT computing equipment analysis of life cycle replacement cost of IT-related equipment.
- DCMA Detroit, Michigan
Windows System Administrator
Abacus Technology Corp.
Chevy Chase
05.2018 - 02.2022
- Analyzed a problem and recommended solutions, products, and technologies to meet business objectives.
- Interprets scan results, implements corrective action, and prepares reports of findings in support of the network infrastructure.
- Provide information technology and automation-related customer support services to the tenant organizations for the Detroit Arsenal Network Enterprise Center.
- Receives, reviews, and disseminates Information Assurance Vulnerability Alert (IAVA) messages throughout the installation IT/IA community and tenant organizations.
- Assisted in incident responses to any breaches, intrusions, or theft.
- Conducts periodic reviews and assessments to identify vulnerabilities, confirm compliance, and prepare reports on findings, and recommend corrective actions, as appropriate.
- Ensures IT devices and networks are secure utilizing the security-focused processes and tools, ensures patches, hotfixes, system change packages, and current AV definitions are applied, and compliance verified.
- Employs risk management principles to analyze threats and vulnerabilities of IT systems processing environment and recommends appropriate countermeasures to mitigate the risks.
- Monitoring of the systems for any anomalies, and doing proper updating, and patching when needed.
- Evaluate and perform planning, testing, and implementation of software and hardware upgrades.
- Update and maintain system documentation and configuration data for regulatory and audit purposes.
- System Administration of all systems, including a myriad of associated hardware/software and numerous interfaces, included in the Local Area Network (LAN) and Wide Area Network (WAN).
- (Detroit Arsenal NEC – Warren, MI)
Sr. Information Technology Specialist
United States Army Reserve
Des Moines
08.2019 - 06.2020
- Troubleshoot and maintain client computers and networks.
- Provide a help desk function to all users of the 103rd ESC personnel.
- Imaging of new unit-assigned Laptops and personal computers.
- Provide desktop computer support, including diagnosing and resolving any workstation operating system software, application software, or hardware problems.
- Provide user instructions for any workstation operating system software or standard application software.
- Setup and configure standard workstation operating system software, all authorized standard application software, and all related services and authorized application software.
- Conducts required information assurance reviews and audits IAW guidelines established by the directing authority.
- Maintains Cybersecurity training credentials utilizing the ATCTS database.
- Verify and validate users' Cyber Training for Account creation for Identity, Credential, and Access Management.
- Various Global Locations
Cyber Security Engineer
Unified Business Technology
Troy
08.2016 - 12.2017
- Administers and monitors implementation of the Department of Defense (DOD) Information Assurance (IA) Risk Management Framework (DIARMF).
- Review risk assessments and analyze the impact of potential vulnerabilities.
- Performs appropriate monitoring and scanning of network resources, utilizing approved Army scanning and security tools, to ensure the network is being used IAW applicable Army and DoD directives.
- Research, develop, establish, and promulgate local policies and procedures on Cybersecurity following Federal laws, Executive Orders, Department of Defense, and Department of the Army directives and regulations.
- Received guidance from and worked in conjunction with the Cybersecurity Leadership, Information System Security Manager (ISSM), TACOM G6, and NETCOM in the protection of the Network and automated information systems.
- Prepares, distributes, and maintains plans, instructions, guidance, and standard operating procedures (SOPs) on the security of automated information system operations.
- Monitors, facilitates DoD 8570.1M licensing/certification requirements, and provides periodic training.
- Promotes information system security and awareness training.
- (TACOM LCMC ILSC – Warren, MI)
Junior System Administrator
Community Network Services
Farmington Hills
09.2015 - 08.2016
- Manage computer network and storage area network with in the company.
- Deploy computers, servers, switches, and firewall devices to the remote locations for the company’s expansion.
- Manage user and computer account on the Microsoft Active directory.
- Manage user email accounts and mailbox database on the Exchange Server.
- Manage Microsoft Exchange server and SSL certificate renewal for the IIS services.
- Setup and Migrate eFax server and Dialogic Media Gateway for eFax service.
- Resolve user and client-related issues and support the ongoing operations of client/server applications, process and procedure developments, and measure performance of the systems environment.
- Perform periodic internal system venerability tests and build a venerability remediation plan.
- Attempt to provide near 99.9% network availability by building and setting up VM redundant servers for identical/mirrored production systems replication.
Information Management Officer
United States Army Reserve
Afghanistan
01.2011 - 05.2012
- Supported end-user computer system issues in Kandahar Airfield, as well as computer network systems to all U.S. Forces in the Kandahar Airbase.
- Coordinated computer network systems to embedded North Atlantic Treaty Organization Forces in Kandahar Airbase, using Cisco systems routers configured by the KAF NCS.
- Subject matter expert in troubleshooting and resolving network issues to maintain continuous LAN availability.
- Managed users and computer accounts on Microsoft Active Directory, and created and maintained profiles for security and group policies on Microsoft Active Directory.
- Various Global Locations
Military Funeral Honors Team Member
United States Army Reserve
Mid-West Region
10.2004 - 12.2010
- Collaborated with the funeral home and family for Military Funeral Honors procedures and proceedings.
- Participated in the ceremony including folding and presenting the United States Flag to veteran’s family.
- Various Global Locations
Sr. Information Technology Management Specialist
United States Army Reserve
Iraq
01.2007 - 05.2008
- Set up and maintained Iraqi Correctional Officer Training School, Multi-National Force Release Committee Court, and 6 Detainee Compound Communication Systems with, voice over internet protocol (VoIP) phones, and internal and external radios.
- Configured and distributed Cisco routers and maintained connectivity using fiber optic cables and GBic media converter.
- Managed and created user and computer accounts, and profiles of group and security policies on Microsoft Active Directory.
- Monitored network logical map with Cisco Network Magic Pro, and maintained and balanced network load with LAN Speed Tester and NetBrute Scanner.
- Trained end-users on usage, basic troubleshooting, and simple problem-solving of computer systems.
- Responsible for 52 computers, 68 VoIP phones, 252 hand-held radios, 2 radio repeaters, and 16 Single Channel Ground to Airborne Radio Systems (SINGARS) while maintaining 100% accountability.
- Various Global Locations
Internship, Electronic Test Technician
Trialon Corp.
Burton
10.2005 - 02.2006
- Tested and troubleshot a variety of electronic equipment; measured electrical performance and signal processing components.
- Assisted Information Technology Network Systems Manager in migration from Windows XP to Windows Vista on client computers, as well as the modification and creation of network interface program.
M1 Abrams Systems Mechanic
United States Army Reserve
Fort Hood
11.1998 - 01.2002
- Troubleshot, repaired and maintained the M1 Abrams Combat tank and all Military Tactical Tracked Vehicles for their optimal performance.
- Collected, compiled, and organized Oil samples from all Military Vehicles for the analysis team stationed in the military post.
- Distributed the result of the analyst to different units on their vehicles.
- Various Global Locations
Education
Bachelor of Science - Computer Science and Network Engineering
University of Michigan
FlintAssociate of Applied Science - Electrical/Electronic Engineering Technology
Baker College
Associate of Applied Science - Computer Information Systems Technology
Oakland Community College
Associate of Applied Science - Computer Network Engineering Technology
Oakland Community College
Associate of Applied Science - Robotics Systems Technology
Oakland Community College
High School Diploma -
Walled Lake Western High School
Skills
- Windows operating systems
- Windows Server management
- Linux distributions
- Programming languages
- Active Directory administration
- Network security devices
- Router configuration
- Virtualization technologies
Certification
- CompTIA Security+ Certification, 05/07/27, COMP001001144029
- CompTIA Network+ Certification, 04/16/27, COMP001001144029
- Microsoft Certified Solutions Associate: Windows Server 2012 R2, 01/30/21, MS016023134
- (ISC)2 CISSP, In progress, 09/01/26
References
Available Upon Request.
Work Preference
Job Search Status
Open to workSalary Range
$97000/yr - $135000/yrTimeline
Information Systems Security Officer
General Dynamics Land Systems
02.2024 - 11.2025
Information Assurance Security Officer
United States Army Reserve
11.2022 - 11.2023
IT Specialist
Defense Contract Management Agency
03.2022 - 10.2023
Sr. Information Technology Specialist
United States Army Reserve
08.2019 - 06.2020
Windows System Administrator
Abacus Technology Corp.
05.2018 - 02.2022
Cyber Security Engineer
Unified Business Technology
08.2016 - 12.2017
Junior System Administrator
Community Network Services
09.2015 - 08.2016
Information Management Officer
United States Army Reserve
01.2011 - 05.2012
Sr. Information Technology Management Specialist
United States Army Reserve
01.2007 - 05.2008
Internship, Electronic Test Technician
Trialon Corp.
10.2005 - 02.2006
Military Funeral Honors Team Member
United States Army Reserve
10.2004 - 12.2010
M1 Abrams Systems Mechanic
United States Army Reserve
11.1998 - 01.2002
Signal Support Systems Specialist
United States Army Reserve
04.1998 - Current
Bachelor of Science - Computer Science and Network Engineering
University of Michigan
Associate of Applied Science - Electrical/Electronic Engineering Technology
Baker College
Associate of Applied Science - Computer Information Systems Technology
Oakland Community College
Associate of Applied Science - Computer Network Engineering Technology
Oakland Community College
Associate of Applied Science - Robotics Systems Technology
Oakland Community College
High School Diploma -
Walled Lake Western High School