Giedrius TuminauskasSenior DevOps Engineer / Technology Expert


Kaunas, Lithuania
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Hello. I am a System administrator DevOps engineer Engineer Researcher Developer Leader
I am passionate about systems and networks administration as well as programming and coding
Welcome to my Personal website



A Systems Administrator with extensive 20+ years of commercial experience and a track record of providing information technology support services to senior level individuals.

A focused and proactive person adopting a motivated and positive approach to all tasks, with a commitment to deliver the highest standards of systems administration at all times.

Possesses excellent interpersonal and communication skills with the ability to adapt to any situation and prioritise tasks.

Key assets are strong attention to detail, the ability to communicate with colleagues, personnel and non-technical staff at all levels.

A valuable member and leader of a successful multi-disciplinary team who thrives in highly pressurised and challenging working environments.






  • 2021
    Vilnius, Lithuania

    Technology Expert

    UAB "NRD Cyber Security"

    NRD Cyber Security - Securing digital environment for citizens, organizations and nations!

    NDA - Non Disclosure Agreement
  • 2019
    Kaunas, Lithuania

    Senior DevOps Engineer

    UAB "Bankera"

    Bankera is an international payment services business, offering bank account alternative solutions to individuals and companies. It is built with a focus on digital businesses

    NDA - Non Disclosure Agreement
  • 2019
    Paris, France

    Senior DevOps Engineer


    Ingenico - Global leader in seamless payment solutions. It provides its clients with sustainable, trusted and secure solutions across the payment value chain and offers best-in-class payment services ranging from POS, online payments, omnichannel solutions to issuing & acquiring and digital banking to nearly one million merchants and 1,200 banks and financial institutions

  • 2018
    Kaunas, Lithuania

    Senior DevOps Engineer

    UAB "Spectro Finance"

    SpectroCoin provides different payment methods to help you to manage bitcoins, including bank transfers and various e-wallets

    NDA - Non Disclosure Agreement
  • 2017
    Kaunas, Lithuania

    Linux Systems Engineer / DevOps

    UAB "Intermedix Lietuva"

    Intermedix an R1 Company equips organizations with technology and analytical tools that promote global health and safety, from crisis management to revenue optimization

    Managed and monitored a large farm of RHEL, CentOS, Ubuntu and FreeBSD physical and virtual servers within development, QA, Demo, DR and Production environments
    Dealt with system and network performance analysis, application behaviour assessment, technical issues, fault identification and resolution, health checking and status reporting
    Installed, configured, tweaked and migrated numerous VMWare / VirtualBox virtual machines
    Automated installation of applications using ansible such as Elasticsearch, Kibana, Redis, Logstash, MySQL, PostgreSQL and other Linux system processes
    Automated new server installations with Vagrant, Kickstart and Ansible, Spacewalk
    Updated Nagios, Zabbix, DNS Bind, Ansible, Vagrant, Kickstart and other configurations via GIT / SVN
    Used continuous integration and continuous delivery tools like Jenkins
    Resolved issues and bugs via Atlassian Jira and maintained documentation in Confluence
  • 2013
    London, United Kingdom

    Linux Systems Administrator

    Alva Reputation Analysis Limited

    alva provides reputation business intelligence to many of the world's largest organisations, helping them to identify the emerging issues that impact their corporate reputation.

    Managed and monitored a farm of RedHat Enterprise Linux (RHEL) servers within development and production environments.
    Dealt with system and network performance analysis, application behaviour assessment, technical issues, fault identification and resolution, health checking and status reporting.
    Developed bespoke monitoring tools to increase awareness of production environment stability and prediction of failures.
    Worked closely with the development operations, testing and pilot releases.
    Built. configured, tweaked and migrated various services and servers, planned maintenance tasks.
    Created scripts in bash, ksh and python to automate tasks, crafted sql queries, deployed updates to production servers.
    Dealt with supplier contracts for key service providers, IT equipment purchases, support and implementation changes.
    Administered users' and services' accounts, provided support where needed
  • 2013
    London, United Kingdom

    Linux Systems Administrator

    Swift Managed Services Ltd

    Virtualized physical Linux (RedHat, Debian, Fedora, Centos) & FreeBSD servers on Windows Server 2012 Standard Edition with Hyper-V – Dell PowerEdge R720 server.
    Gained authorised access to the Data Centre to inventory existing equipment and running services (Dell PowerEdge 850, 950, 1850, 1950, SC1425, 2450, 2850, 2950, R720).
    Installed new virtual CentOS servers on Windows Hyper-V and prepared for data migration.
    Configured separate CPanel, DNS, LAMP (Linux, Apache, MySQL & PHP) Stack and mail services, used VBScript, Bash & Perl scripting.
    Assigned public network IP addresses and managed to create IPTABLES specific firewall rules according to the running services.
  • 2011
    London, United Kingdom

    Systems Administrator

    N&J Building Services Limited

    Managed to upgrade company's IT infrastructure with a domain controller and active directory using Microsoft Windows Servers 2008 R2 to 2012 to achieve efficient administration of network equipment and workstations Installed and configured Windows Server Update Services and managed automatic updates for network clients using Group Policy Management.
    Provided online backup procedures to ensure hardware/software utilization at maximum capacity and to minimize loss of production time.
    Fully accountable for planning the move phases relating to the data and voice infrastructure for the new office and working with external vendors to install and configure equipment.
    Developed website with internal project management and reporting system using IIS & Apache, MySQL and PHP.
    Designed and created training curriculum used in training the staff members and contractors in the use of company website and internal reporting system and achieved speed in managing separate projects. Prepared and evaluated documentation templates for risk assessment, method statements, references, projects & expenses breakdown calculations, quoting and invoicing systems.
  • 2007
    London, United Kingdom

    Linux Systems Administrator

    Itech Services Limited [#05723106]

    IT Services across UK. Specialising in IT Infrastructure and Support.

    Built, installed, configured (Windows 2003/2008 R2 Servers) and deployed Windows 7 workstations using LTI/ZTI, migrated user data (USMT). Tested the Linux networking systems (Redhat, Fedora, Ubuntu, CentOS), monitored the performance (using PTRG, Zenoss, Zabbix & Nagios). Also configured and updated firewalls (IPCop, IPTables, IPChain), firmware as necessary for routers (Netgear, D-Link, Cisco [2600/3600/3700]).
    Performed technical support, including escalation of problems and incident identification with subsequent resolution. Used diplomacy and tact in all situations to ensure end-user satisfaction.
    Documented and maintained supply of all required inventory. Updated management on a regular basis through reports and emails.
    Used Windows Servers 2008 R2 built from scratch for Windows 7 deployment of 1000+ desktops.
    Sub-contracted for such clients: Vodafone, BSkyB, BP, ISG, KPMG, Tesco, British Transport Police, Burberry, Gazprom, News International, OMD International, Deloitte, Roche, Kleinwort Benson.
  • 2007
    London, United Kingdom


    Sentrum Limited

    Sentrum Colo offers colocation solutions to safeguard your most prized hardware and mission critical services.

    Performed routines of running, labelling and testing Cat6 copper cables. Deliveries reception, check-up & secure storage of equipment.
    Physical installation, building server racks, commissioning of equipment as per Client Standards. Regular monitoring of server racks and cabinets equipment within the data centre.
    Assisted in troubleshooting and solving issues related to cabling and networking. Keeping the Data Center organized and efficient.
  • 2006
    London, United Kingdom



    CGG is a fully integrated Geoscience company providing leading geological, geophysical and reservoir capabilities to its broad base of customers primarily from the global oil and gas industry

    Responsible for the team work in upgrade operations building additional server racks to improve performance of their high-availability computing platform.
    Decommissioning of redundant equipment and cabling.
    Carry out regular system checks to ensure the continued operation of the environment. Deliveries reception, check-up & secure storage of equipment.
    Documentation and management of new data center assets.
    Maintaining safe, obstruction free and clean data center premises.
  • 2004
    London, United Kingdom


    London Community College

    Supported daily Desktop & Laptop computer network (Windows XP/2003 Server). Windows AD management, Software updates and other network services monitoring. Website creation and maintenance (Windows, Apache, MySQL, PHP).
  • 2001
    Kaunas, Lithuania

    IT Technician

    Karalius Mindaugas Vocational Training Center

    Working in two departments, supporting and administrating computer networks (Win98/2000). Web development and management (WAMP); Documentation and other office duties.


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