I love building and maintening servers. In whatever form they come by. Whether it's a raspberry Pi, or a cloud mainframe, you name it, i'll get it running.
What i do
This guy says it all.
Training & Certifications
My Training
Resume
Over 10 Years of Experience
Education
SEP '08
Cisco Certified Network Associate (CCNA)
Caledonian University, Glasgow, Scotland, United Kingdom
SEP '04-SEP '05
MSc Management of Information Systems
Division of Business Information Management, Glasgow Caledonian University, Glasgow, Scotland, United Kingdom
JUL'04
Test of English as a Foreign Language (TOEFL)
Educational Testing Service (ETS)
SEP '99-JUL '04
BSc Business Administration
School of Management and Finance, Technological Educational Institute of Chalkida, Greece.
MAY '96
First Certificate in English (FCE)
University of Cambridge
Experience
OCT '21 - CURRENT
IT Manager
Eunice Group of Companies
Worked in a mix of traditional (in house) & cloud datacenters (AWS, Azure) with multiple remote sites throughout Greece due to operation of wind turbine/photovoltaic parks. Multisite infrastructure management. Ensured uninterrupted operation, between sites 24/7.
Planned-analyzed-implemented network solutions for new parks, capturing data from Scada servers & sent to cloud for data analysis. Collaboration with the Dev Team for data science exports.
IT Team lead. Organized team members in L1 and L2 level category with scheduled tasks. Created manuals/knowledge base for the team training.
Within the first days identified problems in the network layer with negative impact in daily operations. Within the first 4 months Introduced a mixture of tools to monitor and provide infrastructure reports that led to the acquisition of multiple isos (27001, 9001, 27701, 14001, 45000) for the first time in the group’s history.
Cloud management (AWS, AZURE). Reduced cloud service costs by analyzing/mitigating resources into different billing plans.
Internal infrastructure management (AD, GPOs, DFS, NPS, WSUS, Hyper-V, VMWare). Troubleshooted the domain architecture (groups, members, file shares, user rights) and reformed it on a "need to access basis", 27001 compatible.
Secured corporate data by user activity reports from commercial & opensource products (ESET antivirus, Safetica DLP, CheckMK, Wazuh, Graylog, glpi, Ansible, SysInternals, Watchguard, Fortinet Suite). Mailbox & corporate mobile devices management using O365 & Azure.
Organized and optimized the Disaster Recovery plan with a scope to be iso 22301 ready. Collaborated with 3rd party vendors to conduct annual series of tests (DR, network stress, penetration internal/external/cloud).
Presented reports/diagrams to the Management Board presenting the IT operations/processes, with simplicity in mind as a measure of tech awareness. Introduced a document management archiving system to help the departments collaborate with each other through electronic document workflows. Created ticketing system for the factory after sales engineering team to organize their work, troubleshoot, document and share response with customers.
Dealt with real IT incidents (VM failure & recovery, dlp incident management response and reporting).
Reconfigured the Voip pbx system to one entity for all sites, be deleting the old local eol pbx boxes scattered on remote sites.
Reconfigured the access card attendance system by collaborating with HR team to export reports according to requirements.
DEC'10-SEP '21
Systems & Network Administrator
Archeiothiki S.A.
Plan, install, configure, manage, optimize servers, network and operations infrastructure for high availability and performance. Support LANs, WANs, network segments accross company sites and services.
Monitor network servers / storage hardware, to ensure availability and reliability are at optimal levels
Troubleshooting equipment / peripherals (desktop computers, printers, routers, switches, access points, voip telephony, personal digital assistants), to analyze and address issues, making necessary modifications to ensure healthy system operation.
Deploying OS Installation, integration, initial operation of the desktop environment to support the business unit’s needs.
APR '10-AUG '10
Employee at Cosmote branch
Organisation of Telecoms Greece (OTE), Lamia, Greece
Registration of prepaid sim cards.
NOV '08-NOV '09
Digital Terminal Devices Operator
Center of Military Communications, Greece
Deployment of IT communications and Information Systems to support large-scale operations during warfare simulation exercise.
OCT '07–SEP'08
Assistant Officer
Learning Resources/IT Services, Glasgow Caledonian University, Glasgow, Scotland, United Kingdom.
Part - time staff during CCNA studies. Troubleshoot user access, network capacity maintenance, compliance with security standards.
DEC'05-SEP'07
I.T. Help Desk
I.B.M. Greenock, Spango Valley, Scotland, United Kingdom
I.B.M. - Lenovo ThinkCentre/ThinkPad/NetVista/Server hardware & software Tech Support. Created knowledgebase with troubleshooting solutions. Training to new agents. Calls monitoring, agent feedback, team progress reports.
OCT '03-MAR'04
Placement
National Bank of Greece, Lamia, Greece
Customer/business Internet accounts & landline/mobile services. line faults on local/international destination line carriers. Troubleshooting WAN/LAN/Wireless.
Skills
Network Administration
Network Optimization
Server Virtualization
Systems Installation & Configuration
Other
Security Solutions
Bacup restore solution
Database install & Management
Workflow Automation
Productivity Improvement
Troubleshoot
Vendors
Vendor equipment, service or software i've played with.
Roles
Roles i've aquired through the years
General Duties
Support LANs, WANs, network segments accross company sites and services.
Monitor network servers / storage hardware, to ensure availability and reliability are at optimal levels
Troubleshooting equipment / peripherals (desktop computers, printers, routers, switches, access points, voip telephony, personal digital assistants), to analyze and address issues, making necessary modifications to ensure healthy system operation.
Deploying OS Installation, integration, initial operation of the desktop environment to support the business unit’s needs.
Operational Role
Manages configuration, operation, backup and recovery procedures for server and storage hardware/software Monitors systems for any unusual or abnormal conditions that are not within defined metrics Assists in incident resolution and provides support to L1 tech team if necessary Provides assistance to System Development and User Tech Support teams in relation to system administration needs, involving systems testing, parallel runs, for successful implementation Ensures compliance to Service Level Agreements with users & clientsAwwwards Site
Infrastructure Management Role
Performs capacity planning for servers, switches and storage hardware/software, both for physical and virtual encironments Assists in preparation and execution of the IT Business Continuity Plan Addressing queries regarding the Information Systems/Software & onsite support eg maintenance of hardware and software. Makes recommendations for future upgrades.
Partner Management Role
Coordinates with hardware and software vendors and service providers for incident resolution, slas and new deployments
Security Management Role
Server and storage hardening Implements server side patch management procedures Maintain network and system security & efficiency by applying daily, weekly, monthly routine tasks. Deploying security updates, service packs, patches and hot fixes using WSUS and Group Policies. Applying Anti-virus security updates / engines and scheduled scanning of systems.
Other Responsibilities
Administration in Windows Server 2003 up to 2019 based environment Experience with Active Directory, Group Policy and Windows services (File Server, DNS, DHCP, terminal services etc), Windows Web Server(IIS6 up to IIS8.5), Windows Database Server (MS SQL 2005 up to 2016) Exposure to mysql and Postgres Server RAID and Storage Configuration Use of veeam Software for vmware infrastructure backup Manage/maintain and testing of Disaster Recovery Infrastructure Ongoing performance tuning, hardware upgrades, and resource optimization as required, configure CPU, memory, disk partitions as required. Install new / rebuild existing servers and configure hardware, peripherals, services, settings, directories, storage, taks etc. in accordance with standards and project/operational requirements. Basic Shell Scripting Well-developed problem solving skills. Monitor firewall & allow/restrict accounts for use of resources. System Installation for monitoring of data center temp/humidity Office 365 administration. File share access rights per group/user policy Involvment in building Physical security (cameras, alarm system, access cards, temperature, humidity levels). Rack cabling
Contributions
Stuff i've build or succeeded in
Accomplishments
Increased overall facility size by 30% every year from 2011 to 2019, expanding remote connectivity for up to more than 250 internal employees in total, including WiFi, VoIP, and VPN capabilities. Implemented server virtualization and NAS technologies resulting a reduction of physical servers by 60% while increasing overall server capacity by 70% from 2011 to 2019. Used additional tools and technologies including, Exchange, VMWare, Active Directory, Group Policies, watchguard firewalls, SSLVPN, MS SQL, Apache, Httpd, Tomcat, Nginx, (S)ftp(s), Openssh, opensssl, linux file services, web services, mysql implementations to provide higher level of service. Proven Success in Systems Optimization and Strategic IT Solutions Strong experience managing server infrastructures and data-center operations across Linux & Windows platforms. Ability to analyse and troubleshoot hardware/software, network design, configuration & security to meet the planned needs Proven ability to create and deliver solutions tied to business growth, organizational development and systems/network optimization. Skilled problem identifier and troubleshooter comfortable managing systems, in a range of IT environments. Evaluate, monitor and enhance IT infrastructure with an emphasis on availability, reliability, scalability, security, data confidentiality and system integrity, with upper goal to ensure 99.9% or better uptime. Migration of old traditional hardware infrastructure to Vmware. Migration local mail exchange server to cloud (office 365) Migration from pstn to voip ip in collaboration with partner company Applied ISO27001/2013, ISO22301, GDPR.
Key Contributions
Reengineered company’s systems setup, established automated server routines, optimized systems performance, installed automatic procedures for upgrades/patches, introduced system monitoring tools to maintain security protocols. Ensured server hardware, operating systems, software and procedures are aligned with organizational standards ISO27001,iso22301 and strategic business plans. Revamped Backup schedule and upgraded all servers. Optimized system availability (averaging 99.95% uptime from 80%) and equipped company with scalable systems to support business growth. Increased IT team productivity and automated repetitive tasks by using task schedulers, batch files, PowerShell, VBScript and WMI queries. Acted as escalation point for troubleshooting advanced network/systems issues with L1 Trained tech team to provide support across multiple departments on network operations including log-in procedures, network management software, account permissions, printing issues, security and use of software. Consulted with client companies to provide Web-based and network solutions over systems migration, configuration, administration, upgrades and troubleshooting initiatives. Delivered a major improvement over old VPN system that catapulted productivity of remote sales force. Resolved a history of problematic network failure by troubleshooting LAN/WAN connections between multiple remote company sites Drove a 25% decrease in Web services performance by migrating databases to standalone server. Corrected configuration issues, wrote scripts to ensure smooth server/reboot functioning. Replaced company's vulnerable network with robust security through joint architecture of new firewall cluster, L3 switches clusters accross all sites and linux log servers. Stabilized, expanded and protected client network and PC environment. Built new network servers to maximize Web hosting, terminal server, file/print sharing and domain control performance. Introduced OSTicket, Mantis ticketing systems to company teams for faster and documented issue resolution Built linux servers servicing collaboration tool to development team for a more organised project approach Created additional domains, vlans, transfered servers/services to different subnets/zones for overall performance security increase Created tunnels with customers for secure access to their data hosted in company's premises