Jin-Ho Yun - Server Migration Consultant

Q: Where is Jin-Ho based?

Jin-Ho is based in Frankfurt am Main, Germany .

Q: What languages does Jin-Ho speak?

Jin-Ho speaks the following languages: German (Native), English (Advanced), Korean (Advanced) .

Q: How many years of experience does Jin-Ho have?

Jin-Ho has at least 28 years of experience. During this time, Jin-Ho has worked in at least 24 different roles and for 25 different companies . The average length of individual experience is 1 year and 1 month . Note that Jin-Ho may not have shared all experience and actually has more experience.

Q: What is Jin-Ho's latest experience?

Jin-Ho's most recent position is Server Migration Consultant at Unknown Client .

Q: What companies has Jin-Ho worked for in recent years?

In recent years, Jin-Ho has worked for Unknown Client , HQ-Capital , Deutsche Bahn , FI-TS (Finanz Informatik Technology Service) , and Atlantic Integrated Freight (A.I.F) .

Q: Which industries is Jin-Ho most experienced in?

Jin-Ho is most experienced in industries like Information Technology , Transportation , and Banking and Finance . Jin-Ho also has some experience in Aerospace and Defense , Manufacturing , and Telecommunication .

Q: Which business areas is Jin-Ho most experienced in?

Jin-Ho is most experienced in business areas like Information Technology , Project Management , and Operations . Jin-Ho also has some experience in Quality Assurance , Procurement , and Customer Service .

Q: Which industries has Jin-Ho worked in recently?

Jin-Ho has recently worked in industries like Transportation , Banking and Finance , and Information Technology .

Q: Which business areas has Jin-Ho worked in recently?

Jin-Ho has recently worked in business areas like Information Technology , Operations , and Quality Assurance .

Recommended expert

Frankfurt am Main, Germany

Check rate

Experience

Feb 2024 - Dec 2024

11 months

Server Migration Consultant

Unknown Client

Linux server migrations: planning and execution of the migration with SLES Linux deployment of VMs in VMware 8.0
Guiding colleagues on configuring Linux VMs with vSphere Auto Deploy
Application operations: ensuring smooth operation of applications on migrated servers
Operations manuals: revising existing manuals, updating and creating new ones as needed
Reviewing service offers: adjusting and optimizing service offerings of external providers
Logistics software, Red Hat Linux, Ansible, Confluence / Jira

Jan 2024 - Present

2 years 7 months

Bad Homburg, Germany

IT Consultant

HQ-Capital

Support for financial software at Quandt Holding, a financial investor since the mid-1980s
Support for branches in New York, Bad Homburg, Dubai, Singapore, etc.
Server and network monitoring using Open Systems and Meraki Dashboard
Teams Voice telephony consolidation meetings focusing on optimization for the holding company and its subsidiaries
Active Directory administration
VMware ESXi administration
Dell ESX Storage v3020 monitoring and administration
MS Server 2012 & 2019 administration, creating GPOs
Operations manuals: revising existing manuals, updating and creating new ones as needed
Monitoring with PRTG
Meraki cloud platform, Open Systems network & security management, AD / Active Directory, MS Server 2012 & 2019, Dell ESX storage systems, PRTG

Oct 2022 - Dec 2023

1 year 3 months

Monitoring Engineer & Technical Contact for bahn.de

Deutsche Bahn

Member of the expert team for the 'Vendo/Movas' project
Technical operations responsibility for monitoring the train ticket system on bahn.de, especially the web part
System runs in Amazon AWS as containers/pods
System monitoring and documentation: continuous monitoring, analysis, and documentation of the system to ensure optimal performance and availability
Incident management, process adjustment of work packages for 1st level, 2nd level, and support teams
Optimizing end-customer communication in case of issues
Change management meetings, risk assessment, and approvals for operational changes
Reviewing deployment results in GitLab, Assisify, and Teams
Ticket management: tracking and communicating tickets to product owners, stakeholders, and development teams
Application administration: partial responsibility for the web presence and ticketing system, including web interfaces
APIs and microservices: error handling and dependency analysis across domains
Test management and troubleshooting: monitoring A/B testing, pre-live tests, and the rollout of the new bahn.de website
Identifying and reporting critical issues and bottlenecks to stakeholders
Risk assessment and quality control: discussing and evaluating feature requests and change approvals
Meeting facilitation and stakeholder management: leading daily bug meetings and regular team meetings on automated tests in stages (test/int, abn, load, pres, pre-prod, prod)
Technical support for annual emergency drills
Collaboration with DB Systel and communication with stakeholders
Jira, Confluence, Instana (IBM), Graylog, Grafana, Splunk Enterprise, DB internal tools, Assisify, GitLab, microservices, Docker, Confluence, Jira

May 2021 - Sep 2022

1 year 5 months

Senior Security Network Engineer

FI-TS (Finanz Informatik Technology Service)

Recertification and testing of firewall rules according to ECB guidelines after an audit for dwpbank via FI-TS
General connection analysis of software packages and their associated firewall rules
Random vulnerability scanning of servers using Jenkins: network configuration, port scans, weak passwords, insufficient protection of folders and files
Analysis and active participation: recertification of firewall rules
IT security consulting and optimization: advising and implementing security rules with CyberArk to improve IT security levels
Stakeholder management: ensuring communication and collaboration internally and with the client
Tools: Nmap, NetScan, Wireshark, ServiceNow (SNOW), Checkpoint and Cisco firewalls, FNT Command, MS Access, MS-SQL, Excel, Change, Bambi, ARS, CATS, Jenkins, Splunk, CyberArk, IP addressing concepts, Skype, ITIL, Skybox

Mar 2021 - May 2021

3 months

Product Owner & SRE Site Reliability Engineer

Commerzbank AG

Agile project management for developing an MVP
Building a financial transaction test bot with Dynatrace Synthetics
Product owner: managing software development with Confluence & Jira; creating user stories
Collaboration with Dynatrace developers and guidance for coding tasks
Communication and reporting: regular project progress meetings and creating PowerPoint presentations for management
Server control: access management on jump servers using CyberArk
Problem management: organizing developer meetings on solution approaches, compliance, and regulatory topics
Support and monitoring: supporting the DHB/CCS Meniga online banking platform in the on-prem cloud
Teamwork in an international team with division of tasks in operations and monitoring
Agile project management, ITIL, user stories, epics, Jira, Confluence, IIS, Meniga, CyberArk, Windows 2012, MS Teams, PSD2, SCA, 2FA, PowerPoint

May 2020 - Mar 2021

11 months

Support Engineer / Application Support Software Engineer

Synamedia / Vodafone GigaTV

Supporting the solution provider in operating and monitoring IPTV and legacy TV services on the Vodafone / Kabel Deutschland platform
3rd level support: Troubleshooting the backend infrastructure in both AWS and on-premise environments
Infrastructure monitoring: Monitoring the Kubernetes infrastructure using Grafana, Kibana, Prometheus, Uchiwa, and PagerDuty
Ticket management and middleware patching using ServiceNow and Jira; patching middleware; following up and tracking ticket handover
Legacy system support, working on the console, reading Linux server logs, configuration control and adjustment
Deployment and error analysis in the test environment as well as pre-analysis for fault qualification of Kubernetes nodes (Linux)
Supporting continuous improvement processes in software development with GitLab
Self-organization in a team of 3 support engineers
AWS S3, Docker, Kubernetes, Grafana, Kibana, Prometheus, Uchiwa, Linux, CentOS, PagerDuty, Microsoft Teams, Slack, GitLab, ServiceNow, Jira, ITIL

May 2019 - May 2020

1 year 1 month

Test Manager & Testing of a Private Cloud Solution

FI-TS (Finanz Informatik Technology Service)

Testing an on-premise cloud solution on Hyper-V and MS Orchestrator for state banks: HELBA, NordLB, BayernLB, LBBW, DEKA
Executing and documenting tests: ongoing tests of the cloud solution across different stages including documentation of results
Communicating with the internal cloud development team and project managers about bugs
Reviewing and adjusting operational concepts
PAM access concepts: Managing and planning automated service and admin accounts for secure access to the private cloud
Actively participating in meetings to prepare application pilots for financial institutions
System analysis using Splunk and communicating results to clients and involved teams
Reviewing and validating technical documents; creating technical one-pagers for each institution
Contributing to pilot application pre-tests and actively developing test automation
Documenting infrastructure as code errors and coordinating with developers
Hyper-V, MS Orchestrator, MS SCOM, MS VMM, MS SCCOM, Windows Server 2012 & 2016, Red Hat 7, Docker, MS SQL, CyberArk, Splunk, GitHub, networking, Squid proxy, VLAN, VMs, Azure Connector, NetApp, SAP CATs, MS Visio, ITIL

Mar 2019 - May 2019

3 months

IT Consultant for Windows and VMware

Enexion GmbH

IT consultant for the on-premises IT environment and VMware
Creating IT documentation of the current configuration and aligning solution approaches
General server administration
MS Active Directory, Windows Server 2008 - 2016, ITIL, VMware ESXi, Hyper-V, WatchGuard Firewall, Veeam

Feb 2017 - Mar 2019

2 years 2 months

Data Center Engineer, Linux & Windows

Dimension Data – VW-MAN MTB & MDT

Administering 1,400 Linux and Windows servers in the Dimension Data private cloud solution on VMware ESXi / Oracle OVM
Supporting the transition team in migrating Linux/Windows servers to the private cloud
Stakeholder management in the Partner Operating Center (POC) for clients and partners (SAP, web developers, network, security, storage)
Administering VMs and on-premise servers including SLES SUSE Linux, OVM, Oracle Linux, Cisco UCS, Windows servers, Ansible, and Jenkins
Managing jump server access with the PAM solution CyberArk; configuring session management, multi-factor authentication, and auditing
System maintenance and monitoring of server health parameters
Backup and recovery for database and application servers using Commvault Simpana
Storage management: NetApp MetroCluster, scaling LUNs and volumes
Active Directory: administering the production environment and maintaining CMDB databases
Network and security: firewall management, creating rule requests, and supporting network issues
Monitoring using Dimension Data's own solutions
Coordinating service providers: eShelter DataCenter Cisco and NetApp
Creating and updating IT processes; maintaining the wiki on Confluence and SharePoint
Incident management and major incidents according to ITIL
SLES SUSE Linux Enterprise Server 11 & 12, Red Hat, MS Active Directory, Windows Server 2008 - 2016, CyberArk, Ansible, Jenkins, ITIL, VMware ESXi, Hyper-V, SAP, Simpana, CommVault Backup, SC2 (VW Service Center 2), Cisco UCS, eShelter

Feb 2016 - Jan 2017

1 year

Frankfurt, Germany

IT-Service Engineer

Systrade GmbH

Supporting IT applications for medium-sized companies in the Frankfurt am Main area
IT project management and infrastructure management: about 8 ESXi servers with 30 Windows/Linux VMs, as well as physical servers and racks
Network architecture: planning and Cisco core switch upgrades
Team leadership and training: leading staff to set up and rollout customer notebooks and replace network hardware
Hands-on with Windows and Linux servers for installation, maintenance, and operation
Incident management and change approval; handling problem, service, and change tickets
Revising and creating operational concepts and manuals
MS Active Directory, Exchange Server 2010 & Office 365, Windows Server 2008 & 2012, VMware ESXi, Hyper-V, Linux, Windows Server 2012 & 2016, WatchGuard Firewall, Backup Exec 2012 & 2015, Veeam, Cisco Catalyst 3850

Jun 2015 - Jan 2016

8 months

Sub-Project Lead in Network Architecture

Arvato Systems

Network planning & design for existing & new customers (end customer: Hettich), virtualized with Juniper SRX
Implementation of load balancers, proxies, SAP routers, TMG servers, web dispatchers, DNS, NTP, DHCP and Streamworks
Creating and managing project plans (MS Project, eWorks)
Leading stakeholder meetings and migrating machine networks with the network/security team
Implementing customer requirements on Layer 2 & 3, including VLAN and IP network planning
Collaborating with service delivery, service management, datacenter run and build teams
VPN planning: setting up site-to-site and dial-in VPNs (IPsec)
Project effort estimation & escalation for bottlenecks
Troubleshooting with Graylog and requesting firewall rules
Script customization in Jenkins and change management in eWorks
MS-Project, MS-Visio, Graylog, VLANs, MPLS, VRF, FNT-Command

Oct 2014 - Dec 2015

1 year 3 months

Frankfurt, Germany

Project Manager + IT Administrator + Technical Purchasing

Wettmeister Service GmbH

Managing about 20 on-premise and VM Windows 2008/2012 and Linux servers
Backup monitoring, user and permissions management
Ticket handling (incidents) according to ITIL: creating, analyzing, tracking and resolving
Network administration of Cisco switches & firewalls
Network upgrade from ADSL to VDSL at 30 sites
Assistant team lead for an IT rollout at 30 sites
2nd & 3rd level support for network and server issues
Planning and deployment of VMware ESXi and SQL 2012
Administration of the video wall solution VOD 'JustAddPower' with Cisco switches
Technical purchasing for hardware, software, network and video wall solutions
Managing an IT budget of about €300,000
Documenting operation manuals and wikis
MS Server 2008 & 2012, MS SQL 2012, Windows 7, VMware ESXi, MS Active Directory, Cisco ASA 55xx, C2960 series, JustAddPower, ArcServe r15, Veeam, VOD

Nov 2013 - Oct 2014

1 year

Berlin, Germany

Migration Specialist, Service Desk Support

Vattenfall

Migration from Windows XP & Office 2003 to Windows 7 & Office 2010 for about 18,000 clients
Incident handling and administration of MS Server 2003/2008, Exchange Server and RAS
Windows XP & 7, MS Office, MS Server, MS AD, Remedy, Dameware, RCMD, SD-Toolbox, Symantec Drive Encryption, SafeNet CryptoCard

Aug 2013 - Nov 2013

4 months

Kassel, Germany

1st & 2nd Level Support

Landeswohlfahrtsverband

Rollout migration support and incident management for 1,200 clients
Migration from Windows XP & Office 2003 to Windows 7 & Office 2010
Administration of MS Server 2003/2008, Exchange 2003/2007, Linux, Citrix Presenter & TS clients on IGEL hardware
Windows XP, Windows 7, MS Office, MS Server, ACMP, ticket systems, Echolon, Citrix Presenter, Terminal Server

Aug 2006 - Mar 2011

4 years 8 months

IT, Server and Network Administration

Hyundai-Kia Machine Tools Europe GmbH

Administration of MS server services: Datev, SAP and MS TS Server 2003
Supporting Windows XP clients
Managing the WAN connection with Cisco firewall & routers on Dell servers
MS Server 2003, MS Active Directory, SAP server, Cisco Pix 501, VPN, WAN, Dell PowerEdge 840

Jan 2006 - Dec 2008

3 years

Eschborn, Germany

External IT Consultant

Pantech & Curitel

Complete IT management and setup of the European headquarters in Eschborn
Administration of Windows servers, internet & WAN connection as well as PBX

Sep 2005 - Jul 2011

5 years 11 months

IT Consultant

Pantos Logistics

Server management of server services including Exchange, TS & application servers
Operation of the WAN SDSL network
MS Server 2003, Active Directory, Bintec Firewall, IPSEC-VPN, WAN, SDSL, DHCP, DNS, ML Proliant and Dell servers

Apr 2003 - Dec 2015

12 years 9 months

Germany

Managing Director / IT Service for SMB

HAYU ITC GmbH & Co KG

Supported about 40 companies in the SMB sector (Hesse) like Hyundai Mobis, Nexen Tire, etc.
Planning, implementation & administration of Active Directory and user support
Setup of leased lines, network cabling, VPN and firewalls
Server management: file, backup, email and MS SBS servers
Support and setup of ISDN telephone systems
Administration of Windows Server 2000-2012, Exchange Server 2007, Blackberry and NAS systems
Troubleshooting & repair of IT systems

Mar 2003 - Dec 2021

18 years 10 months

Frankfurt, Germany

IT Admin & IT Manager

Atlantic Integrated Freight (A.I.F)

Administration, planning & maintenance of the IT & telephone system for logistics sites
Server SBS 2008 with Active Directory; support of 30 PCs at 2 locations
Administration and configuration of the Agfeo IT 200 telephone system and Bintec firewall
Win XP, Win 7, MS SBS 2000 - 2012 Server, MS Active Directory, Terminal Server, Agfeo IT 200, Bintec-Funkwerk VPN router, HP ProLiant

Mar 2003 - Dec 2013

10 years 10 months

Frankfurt, Germany

IT Consultant

Bank of Korea

Consulting and support for IT PCs and networks
Administration of the Siemens telephone system & Cisco Switch 2960
Cisco Switch 2960, firewalls, XP, Siemens telephone systems

Mar 2003 - Dec 2013

10 years 10 months

Lecturer / Trainer

ML Consulting for the German Federal Armed Forces

Teaching client-server administration nationwide
Networking basics, TCP/IP, client-server, Active Directory

Jan 2003 - Dec 2013

11 years

IT Project Manager / Administrator

Eukor Car Carrier Inc.

IT relocation management: coordinating external service providers, site supervision, SDSL provider
Dismantling and setup of servers, databases, and network components in server racks
Administration of MS File, Exchange, Blackberry servers, and VPN users
Migration from MS AD 2003 to 2008
Consulting and setup of the Juniper SA 2500 VPN solution
Cisco Catalyst 2950, Networkbox, MS AD

Aug 2000 - Apr 2003

2 years 9 months

Frankfurt, Germany

2nd Level Support for NT & AIX Servers

Dresdner Bank

2nd level support for over 4,000 users
Notebook rollout and network support for over 13,000 devices
Using PC-Duo, Hyena, Perl, and RAS support

Aug 1999 - Jul 2000

1 year

Düsseldorf, Germany

Remote

Third Level Support NT Servers & Terminal Server Setup

Henkel Düsseldorf (at Debis Systemhaus)

3rd level administration and support for about 100 NT, Novell, backup, and antivirus servers
Domain consolidation and remote monitoring
Planning, setup, and documentation of a training center with Terminal Server (Citrix Metaframe 1.8)
Environment: chemical industry and automotive (Mercedes-Benz steering systems)

Jan 1999 - Dec 1999

1 year

Owner / Founder

Yun IT Consulting

Founded a business for IT consulting

Jan 1999 - Aug 1999

8 months

Hamburg, Germany

Trainer

LVA Rentenversicherung / Siemens-Essen

Conducting various training sessions on NT servers and workstations, administration and network fundamentals
Conducting training sessions in the NT environment and networking

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Transportation, Banking and Finance, Aerospace and Defense, Manufacturing, and Telecommunication.

Information Technology

Transportation

Banking and Finance

Aerospace and Defense

Manufacturing

Telecommunication

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Project Management, Operations, Quality Assurance, Procurement, and Customer Service.

Information Technology

Project Management

Operations

Quality Assurance

Procurement

Customer Service

Skills

Several Years Of Experience As A Senior System Engineer In 2nd And 3rd Level Support
Application Support At The Os Level
Bringing 25 Years Of It Experience, Especially In Operations Across Various It Areas
Extensive Knowledge Of Different Monitoring Solutions
Experience In Private Cloud Solutions Based On Sccm Technology As Well As Vmware
Aws Cloud Computing + S3 Know-How + Github Devops Tools
Teamwork: Very Good
Personal: Open And Honest
Learning Ability: Self-Taught As Well As Through Training
Other: Quick To Understand Personal Limits, Uses External Support
Independence: I Independently Take On Tasks And Develop Appropriate Solutions.

Languages

German

Native

English

Advanced

Korean

Advanced

Education

Oct 1993 - Jun 1998

University of Applied Sciences Düsseldorf

Electrical Engineering / Microelectronics · Düsseldorf, Germany

Aug 1990 - Jun 1993

Municipal College and Technical School Duisburg Nord

State-certified electrical engineering assistant, technical college entrance qualification · Duisburg, Germany

Certifications & licenses

Consultant for Electric Mobility and Alternative Drives

Dekra

CyberArk Trustee

CNA

Certifed Novell Administrator

MCP

Microsoft Certified System Engineer

Adobe Sales Professional

Statistics

Experience

Total positions 26

Experience in Information Technology 21 y

Avg length 3 y 8 m

Longest experience 18 y 9 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Server Migration Consultant, IT Consultant, Monitoring Engineer & Technical Contact for bahn.de

Main industries Information Technology, Transportation, Banking and Finance

Main business areas Information Technology, Project Management, Operations

Qualifications

Certifications earned 7

Profile

Created

March 2025

Last Update

July 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Jin-Ho based?

Jin-Ho is based in Frankfurt am Main, Germany.

What languages does Jin-Ho speak?

Jin-Ho speaks the following languages: German (Native), English (Advanced), Korean (Advanced).

How many years of experience does Jin-Ho have?

Jin-Ho has at least 28 years of experience. During this time, Jin-Ho has worked in at least 24 different roles and for 25 different companies. The average length of individual experience is 1 year and 1 month. Note that Jin-Ho may not have shared all experience and actually has more experience.

What roles would Jin-Ho be best suited for?

Based on recent experience, Jin-Ho would be well-suited for roles such as: Server Migration Consultant, IT Consultant, Monitoring Engineer & Technical Contact for bahn.de.

What is Jin-Ho's latest experience?

Jin-Ho's most recent position is Server Migration Consultant at Unknown Client.

What companies has Jin-Ho worked for in recent years?

In recent years, Jin-Ho has worked for Unknown Client, HQ-Capital, Deutsche Bahn, FI-TS (Finanz Informatik Technology Service), and Atlantic Integrated Freight (A.I.F).

Which industries is Jin-Ho most experienced in?

Jin-Ho is most experienced in industries like Information Technology, Transportation, and Banking and Finance. Jin-Ho also has some experience in Aerospace and Defense, Manufacturing, and Telecommunication.

Which business areas is Jin-Ho most experienced in?

Jin-Ho is most experienced in business areas like Information Technology, Project Management, and Operations. Jin-Ho also has some experience in Quality Assurance, Procurement, and Customer Service.

Which industries has Jin-Ho worked in recently?

Jin-Ho has recently worked in industries like Transportation, Banking and Finance, and Information Technology.

Which business areas has Jin-Ho worked in recently?

Jin-Ho has recently worked in business areas like Information Technology, Operations, and Quality Assurance.

What is Jin-Ho's education?

Jin-Ho attended University of Applied Sciences Düsseldorf for Electrical Engineering / Microelectronics.

Does Jin-Ho have any certificates?

Jin-Ho has 7 certificates. Among them, these include: Consultant for Electric Mobility and Alternative Drives, CyberArk Trustee, and CNA.

What is the availability of Jin-Ho?

Jin-Ho is immediately available full-time for suitable projects.

What is the rate of Jin-Ho?

Jin-Ho's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.