Siniša Vujasin - Windows System Administrator

Q: Where is Siniša based?

Siniša is based in Banja Luka, Bosnia and Herzegovina and can operate in on-site , hybrid , and remote work models.

Q: What languages does Siniša speak?

Siniša speaks the following languages: Bosnian (Native), English (Advanced) .

Q: How many years of experience does Siniša have?

Siniša has at least 23 years of experience. During this time, Siniša has worked in at least 2 different roles and for 2 different companies . The average length of individual experience is 8 years and 8 months . Note that Siniša may not have shared all experience and actually has more experience.

Q: What is Siniša's latest experience?

Siniša's most recent position is Windows System Administrator at Pošte Srpske A.D. .

Q: What companies has Siniša worked for in recent years?

In recent years, Siniša has worked for Pošte Srpske A.D. .

Q: Which industries is Siniša most experienced in?

Siniša is most experienced in industries like Transportation and Logistics , Government and Public Administration , and Retail .

Q: Which business areas is Siniša most experienced in?

Siniša is most experienced in business areas like Information Technology (IT) and Operations .

Q: Which industries has Siniša worked in recently?

Siniša has recently worked in industries like Transportation and Logistics .

Q: Which business areas has Siniša worked in recently?

Siniša has recently worked in business areas like Information Technology (IT) and Operations .

Recommended expert

Banja Luka, Bosnia and Herzegovina

Experience

Jun 2019 - Present

6 years 10 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

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Transportation (23 years), Government and Administration (16 years), and Retail (0.5 years).

Transportation

Government and Administration

Retail

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (23 years) and Operations (7 years).

Information Technology

Operations

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

Profile

Created

December 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Siniša based?

Siniša is based in Banja Luka, Bosnia and Herzegovina and can operate in on-site, hybrid, and remote work models.

What languages does Siniša speak?

Siniša speaks the following languages: Bosnian (Native), English (Advanced).

How many years of experience does Siniša have?

Siniša has at least 23 years of experience. During this time, Siniša has worked in at least 2 different roles and for 2 different companies. The average length of individual experience is 8 years and 8 months. Note that Siniša may not have shared all experience and actually has more experience.

What roles would Siniša be best suited for?

Based on recent experience, Siniša would be well-suited for roles such as: Windows System Administrator, IT Support Technician.

What is Siniša's latest experience?

Siniša's most recent position is Windows System Administrator at Pošte Srpske A.D..

What companies has Siniša worked for in recent years?

In recent years, Siniša has worked for Pošte Srpske A.D..

Which industries is Siniša most experienced in?

Siniša is most experienced in industries like Transportation and Logistics, Government and Public Administration, and Retail.

Which business areas is Siniša most experienced in?

Siniša is most experienced in business areas like Information Technology (IT) and Operations.

Which industries has Siniša worked in recently?

Siniša has recently worked in industries like Transportation and Logistics.

Which business areas has Siniša worked in recently?

Siniša has recently worked in business areas like Information Technology (IT) and Operations.

What is Siniša's education?

Siniša attended El.Technical Higher School.

Does Siniša have any certificates?

Siniša has 2 certificates. These include: MS-900 Exam: Microsoft 365 Fundamentals and AZ-900 Exam Preparation: Microsoft Azure Fundamentals.

What is the availability of Siniša?

Siniša is immediately available part-time for suitable projects.

What is the rate of Siniša?

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