Siniša Vujasin - Windows System Administrator

Recommended expert

Banja Luka, Bosnia and Herzegovina

Experience

Jun 2019 - Present

6 years 8 months

Banja Luka, Bosnia and Herzegovina

Windows System Administrator

Pošte Srpske A.D.

Kaspersky Security Center managing (KSC) for cca 1700 workstations
Windows 2019 Active Directory and DC configurations and virtualization
Windows Server 2019 and 2022 advanced administration
HyperV and VMWare
SCCM OS imaging
Azure AD and IM, patching and vulnerability related to software deployments
SCOM monitoring and managing infrastructure
Troubleshooting incidents (including indicators or precursors) in a timely manner (SIEM)
Ticketing systems
Building policies and security in Domain and on KSC
Document processes and procedures and keep relevant infrastructure documentation up-to-date
Windows workstations management, 1st and 2nd line support onsite and remote
Backup and patching
Deploy and configure Linux server system
Remote interactions and videoconferencing
Network sharing, working on network and applications planning and implementation
Testing and integration of new operating systems, drivers and patches
PowerShell scripting
Manage Mac OSX and Mac OS
Installing software and hardware, MDM, resolving printing and software problems, fixing mobile devices
Experience with DELL, IBM and Fujitsu Siemens equipment
Collaboration with vendors (Adobe, AutoCad, Microsoft and Kaspersky)
Administering, managing and coordinating software and hardware orders and licenses
Making guides and labs and giving classes

Mar 2019 - Jun 2019

4 months

Munich, Germany

IT Support Technician

Westwing Home & Living

Worked on Active Directory and JAMF
Configured new laptops from images for Macs and Windows onboarding
Resolved all kinds of tickets from Germany and Poland offices
Managed GSuite, Office 365, Matrix42, PowerShell, Cloud, inventory and reports

Feb 2003 - Feb 2019

16 years 1 month

Banja Luka, Bosnia and Herzegovina

Windows System Administrator

Pošte Srpske A.D.

Kaspersky Security Center 11 managing (KSC) for cca 1000 workstations
Windows 2008 R2 and 2012 R2 Active Directory and DC configurations and virtualization
Windows Server 2016 advanced administration
HyperV and VMWare
SAN and NAS technologies
Office 365
Ticketing systems, data and disaster recovery
Building policies and security in Domain and on KSC
Office applications management
1st and 2nd line support onsite and remote
OS imaging (Acronis), backup and patching
Deploy and configure Linux server system
Remote interactions and videoconferencing
Network sharing, working on network and applications planning and implementation
TCP/IP, VPN, LAN and WAN
Some scripting (PowerShell)
Manage Mac OSX and Mac OS
Installing software and hardware, troubleshooting, resolving printing and software problems, fixing mobile devices
Experience with DELL, IBM, HP and Fujitsu Siemens equipment
Collaboration with vendors
Making guides and labs and giving classes

Summary

Experienced Windows System Administrator with a demonstrated history of working in State Postal Services. Skilled in Windows Server 2025 and Windows Server 2019&2022, VMware ESXi, Managing Active Directory&DC, managing Linux systems, MS Azure Cloud, MS 365, Win 10&11, remote tools for troubleshooting and deployment, security and monitoring servers, ticketing systems, etc.etc. Mac OSX managing and smartphones fixing as additional skills.

Skills

Windows Server 2025
Windows Server 2019&2022
Vmware Esxi
Active Directory& Dc Sccm 2016
Endpoint Manager
Azure Cloud
Ms 365
Windows 10&11
Powershell
Linux System Administration
Mac Osx Managing
Kaspersky Security Center
Hyperv&vmware
Backup And Patching
Mac Osx And Mac Os
Mdm
Software&hardware Orders And Licenses
Gsuite
Cloud
Ibm Siem Qradar
Windows 2012r2 Active Directory And Dc Configurations And Virtualizations
Windows Server 2016 And Windows Server 2019 Advanced Operations
Msteams
Webex
Zoom
Resolving Printing & Software Problems
2016,2022 And 2025 Servers
Edr And Xdr Cyber Security
Skype For Business
Microsoft Exchange
Vsphere
Ubuntu&centos
Adobe Packages
Remote Tools-vnc, Rdp, Teamviewer, Logmein
Prtg
Jira And Freshdesk Ticketing
Sql Server2016
Data Recovery And Security Software
Video Conferencing Tools

Languages

Bosnian

Native

English

Advanced

Education

Oct 1979 - Jun 1983

El.Technical Higher School

Certifications & licenses

MS-900 Exam: Microsoft 365 Fundamentals

AZ-900 Exam Preparation: Microsoft Azure Fundamentals

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Similar Freelancers

Discover other experts with similar qualifications and experience

Experience

Windows System Administrator

Pošte Srpske A.D.

IT Support Technician

Westwing Home & Living

Windows System Administrator

Pošte Srpske A.D.

Summary

Skills

Languages

Education

El.Technical Higher School

Certifications & licenses

MS-900 Exam: Microsoft 365 Fundamentals

AZ-900 Exam Preparation: Microsoft Azure Fundamentals

Similar Freelancers

Freelance IT Specialist

Solution Architect / Senior Software Engineer

Senior ICT System Engineer

Senior System and Cloud Engineer

IT all-rounder

System Engineer – VMware, Veeam

Server Migration Consultant

MS365 Consultant/Solution Architect

Senior System Engineer Microsoft

IT Consulting / IT Rebuild

Senior Citrix Consultant & Architect, NetScaler Expert

Freelance Senior Consultant & Cloud Architect

Architecture management

IT Consultant

Cloud & IT Service Management with Azure & ServiceNow (freelance)

System and Endpoint Hardening

IT Freelancer

Senior Project Manager S4HANA in the Energy Sector

Managing Director; Senior IT Infrastructure & Cybersecurity Consultant

Senior System Administrator

Senior System Engineer (Server)

Senior Network Engineer

IT Client and User Admin

Consultant / Project Manager

Freelance IT Consultant & Technical Content Creator

Senior Project Manager - RIS & PACS Replacement

Freelancer

Server Administrator

Exchange Architect

Windows/Linux Consultant - Strengthening Cybersecurity