Contact
- (Mobile)-
www.linkedin.com/in/željkostojević-a- (LinkedIn)
Top Skills
Windows System Administration
Backup & Recovery Systems
Amazon Web Services (AWS)
Željko Stojević
Senior Engineer - Cloud & Infra Management
Zagreb, Zagreb, Croatia
Summary
System Engineer experienced in Linux and windows administration.
My current focus and area of learning, implementing and improving
is Building, deploying and automating configuration of on-premise
virtual machines and containers. Along with build and deployment
comes a very important factor called Cyber security for which I
maintaining highest possible level of privacy and network security.
Besides the on-premise infrastructure for which I dedicate a large
portion of my time to protect mission critical and sensitive data, I
offer service of VM deployment into private cloud within OpenStack.
Nothing would be briefly possible without data integrity and firm
IPS and IDS as well as DR. I am very passionate about legacy
systems, Operations technology and older technologies which can
still be used today due to their reliability and resilience, such as:
IBM AS/400, AS z/OS and backing up data on old school lto tape
drives. Sometimes we need to take a step backward in order to leap
forward and preserve and protect our data. I offer services of building
and maintaining Air-Gap networks for highest level of security
from outside threats even with low-performing hardware which can
still run light weight Linux such as: Debian minimal, Alpine OS,
TinyCore, Lubuntu, Qubes OS, Tails OS. My work with deployment,
configuration automation, and provisioning include:
- Kali OS (Host)
- VM (Ubuntu, Debian, Alpine OS)
- Scripting (Bash)
- Configuration (Ansible)
- Provisioning ( Vagrant )
- Version control system ( Bitbucket)
- Virtualization tools (Virtualbox, Vmware, QEMU)
- Backup and recovery of my work (rsync, UrBackup)
For my OT path I am using sandboxes within virtualbox to emulate:
- SCADA Server and HMI (ScadaBR)
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- PLC Nodes and simulator (OpenPLC)
- Network Monitor (Wireshark)
For example of my work and documentation I kindly ask of you to
visit:
https://bitbucket.org/ovozemaljskibog/workspace/repositories/
Experience
LTIMindtree
Senior Engineer - Cloud & Infra Management
October 2024 - Present (8 months)
Zagreb, Croatia
CU-BIT
1 year 5 months
IT Analyst
December 2023 - October 2024 (11 months)
Zagreb, Croatia
Performed the troubleshooting of the Server infrastructure, services, software,
database as well as the workstations and business applications of Dresden
factory.
Used several software to Monitor and maintain platform data and network
traffic such as:
- Microsoft SQL management Studio
- Microsoft Visual Studio Code
- Panorama
- Brinqa
Deploying version control changes within database reports via Bitbucket and
GIT GUI.
Management of the workstations, servers, groups and users in the Microsoft
Active directory. Creating and Maintaining knowledge base for Dresden
Team and organizing troubleshooting sessions with the users. Reporting,
remediating and closing: incidents, change requests and
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de-escalating incoming requests.
Maintaining B2C support by providing role based access management for
dedicated target systems to end-users.
Security Analyst
June 2023 - December 2023 (7 months)
Zagreb, Croatia
Vulnerability monitoring and scanning via risk based vulnerability management
monitoring tool Brinqa, Fume, Sofy. Visualizing, organizing and reporting data
via Power BI, and delivering reports with excel. Attending meetings with the
Service managers to provide consultations on the ongoing vulnerabilities,
suggest potential solutions and report vulnerability risks via OneGRC platform.
Building custom technical documentation and knowledge base to help
remediate upcoming cases.
Samoborska banka d.d.
System Administrator
February 2022 - June 2023 (1 year 5 months)
Samobor, Zagreb, Croatia
Working as a System administrator at a national bank in the city of Samobor.
My daily tasks included:
- End-point Monitoring and management via SCCM
- Maintaining and upgrading bank IT infrastructure, Data base and backup
Monitoring and management via Data protection management Server
- Network security and maintenance via SRX Juniper
- Bank Server configuration and maintenance in Linux CentOs 7
- Computer Hardware installation and distribution on site.
Generating Incident reports with Microsoft office tools and submitting to the
management.
Span
Service Desk Operator
October 2020 - February 2022 (1 year 5 months)
Zagreb, Zagreb, Croatia
Working as a Service desk agent with Microsoft technology which include:
System monitoring via SCOM and Nagios, Zabbix, O365 platform, Microsoft
azure, active directory, case tracking management via ticketing system,
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customer management via email, calls and MS Teams meetings. Remote endpoint management via remote desktop, Report generating.
H5 d.o.o
Associate Designer
February 2016 - October 2020 (4 years 9 months)
Working as an associate designer for energy facilities including: Electricity,
water
facilities, gas and drainage systems. Managing multiple projects as well as
performing design in Autocad and Solidworks.
Education
VSITE-Visoka škola za informacijske tehnologije
bacc.eng.inf.tech, Iformation systems · (2009 - 2014)
VSITE-Visoka škola za informacijske tehnologije
Computer Systems Networking and Telecommunications · (2017)
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