freiberufler Systems Administrator auf freelance.de

Systems Administrator

offline
  • 25€/Stunde
  • 81735 Munich
  • Nähe des Wohnortes
  • en  |  de
  • 13.11.2023

Kurzvorstellung

I possess expertise in advanced computer networks, cybersecurity, and computer hardware, backed by more than 15 years of experience in the IT field. I began my career as an IT technician and progressed to the role of Head of IT.

Qualifikationen

  • Active Directory
  • Cisco (allg.)11 J.
  • Cisco Router4 J.
  • Cisco Switch4 J.
  • Cyber Security13 J.
  • IT-Support (allg.)
  • IT-Techniker (allg.)
  • Lokale Netzwerke19 J.
  • Microsoft Office 365
  • Netzwerk-Sicherheit11 J.
  • Netzwerkarchitektur11 J.
  • Open Database Connectivity11 J.
  • Projektleitung / Teamleitung (IT)11 J.
  • Server Administration16 J.
  • Systemadministration (allg.)13 J.
  • TCP / IP1 J.
  • Vmware1 J.
  • VPN16 J.
  • WAN16 J.
  • WLAN (Wireless Local Area Network)19 J.

Projekt‐ & Berufserfahrung

Head of IT
Vidhan Hydro, Kandy
4/2013 – offen (11 Jahre, 8 Monate)
Dienstleistungsbranche
Tätigkeitszeitraum

4/2013 – offen

Tätigkeitsbeschreibung

I manage the organization's IT infrastructure, overseeing everything from equipment maintenance and project acquisition to purchasing. I lead a team responsible for our operations both in-house and at remote locations. Our primary emphasis is on storing field data and establishing data repository systems, enabling remote access for analytical purposes.

Eingesetzte Qualifikationen

Open Database Connectivity, Cyber Security, Netzwerk-Sicherheit, Projektleitung / Teamleitung (IT), Server Administration, Systemadministration (allg.), Cisco (allg.), Lokale Netzwerke, Netzwerkarchitektur, VPN, WAN, WLAN (Wireless Local Area Network)

Head of IT
Connaiscance De Ceylon, Colombo
9/2011 – 4/2013 (1 Jahr, 8 Monate)
IT & Entwicklung
Tätigkeitszeitraum

9/2011 – 4/2013

Tätigkeitsbeschreibung

I held responsibility for overseeing 120 host machines and 4 servers distributed across two floors of the World Trade Center in Sri Lanka, as well as managing servers for several hotels situated in three different locations within the country. Additionally, I orchestrated a comprehensive overhaul of the firm's IT infrastructure, replacing the existing congested network with a new design. This redesign involved the implementation of a dedicated line connecting the head office in Colombo to various hotel chains dispersed across the island. To enhance overall network efficiency, I managed network traffic by implementing proper server administration, resolving connectivity timeouts through the re-routing of network traffic via switches, and optimizing the interface cards of both host machines and servers.

Eingesetzte Qualifikationen

Cyber Security, Windows 10, Windows 8, Server Administration, Google Cloud, Systemadministration (allg.), Cisco Router, Cisco Switch, Lokale Netzwerke, Netzwerkadministration (allg.), TCP / IP, VPN, WAN, WLAN (Wireless Local Area Network), Vmware

Surveillance Engineer
E-Wis Technologies, Colombo
1/2008 – 11/2010 (2 Jahre, 11 Monate)
IT & Entwicklung
Tätigkeitszeitraum

1/2008 – 11/2010

Tätigkeitsbeschreibung

Inspection and Installation of suveillance and networking equipment for government contracts and for private sector. I worked with brands such as Axis surveillance cameras and HP/CISCO switches and routers. Cabling and managing server racks were also part of my responsibilities.

Eingesetzte Qualifikationen

Windows 7, Windows Server 2003, Windows Server 2008, Cisco Router, Cisco Switch, Lokale Netzwerke, WLAN (Wireless Local Area Network), Videoüberwachungssysteme / Kameraüberwachung

IT Executive
ResExplore International, Colombo
1/2004 – 4/2007 (3 Jahre, 4 Monate)
Bergbau
Tätigkeitszeitraum

1/2004 – 4/2007

Tätigkeitsbeschreibung

Supervised a network of 25-30 host machines within a LAN environment, facilitating an upgrade to Wireless 802.11 a/b. Enabled users from various branches or home locations to connect through a VPN that I configured. My primary responsibilities included software deployment, network management, and hardware maintenance

Eingesetzte Qualifikationen

Lokale Netzwerke, Server Administration, VPN, WAN, Windows NT, Windows Server 2003, Windows XP, WLAN (Wireless Local Area Network)

IT Technician
Hydense Research, Colombo
12/2003 – 11/2004 (1 Jahr)
Bergbau
Tätigkeitszeitraum

12/2003 – 11/2004

Tätigkeitsbeschreibung

Computer maintenance in a small office network which comprised of 15-20 computers running Windows on a peer to peer network.

Eingesetzte Qualifikationen

Informatik

Zertifikate

Cisco Certified Network Associate (CCNA)
Microcomm Institute of Technology
2007
CompTIA N+ Network Professional Certificate
Microcomm Institute of Technology
2006
CompTIA A+ Hardware Professional Certificate
Microcomm Institute of Technology
2005

Ausbildung

Diploma in Networks and Cybersecurity
International Advanced Diploma
Informatics Academy, (Singapore)
2011
Singapore

Über mich

I hold certifications from Vue CompTIA and CISCO, along with a Cyber Security certification from Singapore. With a career spanning over 15 years in IT, I initiated my journey as a computer hardware technician in 2005 and advanced to the role of Head of IT. Throughout my tenure, I've worked extensively with host machines operating on Windows, Linux, and macOS, as well as servers, routers, and switches. My expertise encompasses routing and switching, firewall management, and both basic and advanced network security methodologies. Additionally, I excel in conducting routine hardware maintenance and troubleshooting, addressing issues in operating systems and networks.

Weitere Kenntnisse

Softwares -Microsoft Windows (7/8/10/11), Microsoft Windows Server (2008 - present), Active Directory Management, Office 365, VPNs, VMware, Azure, Wireshark,

Networking - LAN/WAN design an implementation, troubleshooting, routing, switching, TCP/IP settings, IP addressing (v4/v6), Subnetting, WiFi deployment/configuration, user accounts & privileges, handling network traffic congestion

Computer Hardware - Hardware diagnostics, maintenance (cleaning), upgrading & parts replacement (CPU, Motherboard, RAM, PSU, Wiring, Cabling)

Persönliche Daten

Sprache
  • Englisch (Muttersprache)
  • Deutsch (Grundkenntnisse)
Reisebereitschaft
Nähe des Wohnortes
Profilaufrufe
154
Alter
40
Berufserfahrung
20 Jahre und 11 Monate (seit 12/2003)
Projektleitung
1 Jahr

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