Jovan is available for hire
Hire JovanJovan Zivkovic
Verified Expert in Engineering
IT Security Developer
Belgrade, Serbia
Toptal member since June 19, 2026
Bio
Jovan is a senior IT security analyst with over nine years of experience in system protection and risk mitigation for clients, including FIS, S&T Serbia, and Coca-Cola Hellenic. He specializes in Windows OS environments, Front Arena modules, and vulnerability management for the finance and energy sectors. Jovan achieved a 20% improvement in compliance with industry standards while at FIS.
Portfolio
FIS
Checkmarx, Java
FIS
Vulnerability Management
FIS
OMNI
Experience
- IT Security - 11 years
- Windows - 11 years
- Windows System Administration - 10 years
- Windows Server - 5 years
- VMware - 5 years
- ServiceNow - 4 years
- Jira - 3 years
- Vulnerability Management - 3 years
Preferred Environment
Windows, ServiceNow, Jira, Cisco AnyConnect, Citrix
The most amazing...
...security process I have improved is achieving a 20% increase in compliance with industry standards at FIS.
Work Experience
Senior IT Security Analyst
2025 - PRESENT
FIS
- Coordinated with development teams to enhance security policies, achieving a 20% improvement in compliance with industry standards across the organization.
- Analyzed security incidents and updated procedures, resulting in a 20% decrease in recurring issues over two quarters.
- Resolved the most critical Java vulnerabilities on development servers by conducting a thorough security audit, identifying high-risk flaws in Java dependencies, and systematically patching or upgrading vulnerable components.
Technologies: Checkmarx, Java
IT Security Analyst
2024 - 2025
FIS
- Drove vulnerability management initiatives by implementing automated scanning tools, reducing critical security risks by 40% within six months for FIS infrastructure.
- Conducted vulnerability assessments, identifying and remediating 95% of critical security threats within 30 days, enhancing overall security posture.
- Improved security policies for the Front Arena project by conducting a comprehensive security audit, identifying critical vulnerabilities, and implementing updated policies that strengthened access controls.
Technologies: Vulnerability Management
Senior Product Representative
2019 - 2024
FIS
- Resolved complex Front Arena technical support issues by analyzing root causes, reducing ticket resolution time by 30%.
- Analyzed customer feedback to identify 15 key Front Arena feature enhancements, leading to a 25% increase in user satisfaction scores within six months.
- Solved critical issues that were concerning client-side Front Arena modules installations.
Technologies: OMNI
Client Services Analyst
2018 - 2019
FIS
- Analyzed Front Arena trade support issues, implementing process enhancements that reduced resolution time by 30% within six months.
- Managed client communications during service disruptions, effectively reducing negative feedback by 35% and maintaining overall client trust.
- Helped the team achieve the set KPIs by staying focused on priorities, coordinating tasks effectively, and supporting smooth communication across the group.
Technologies: Jira
Senior IT Specialist and Team Leader
2017 - 2018
S&T Serbia
- Directed a cross-functional team of 10 IT specialists on the Gazpromneft/NIS project, improving system uptime by 30% within 12 months using optimized IT infrastructure strategies.
- Streamlined IT operations by initiating standard procedures, which resulted in a 20% increase in team efficiency and project completion rates.
- Created a universal .wim file (drivers, policies, and updates) and created bootable USB SSD drives using the universal .wim file.
Technologies: Windows System Administration
IT Support Analyst
2015 - 2017
Atos IT Solutions
- Resolved 95% of Windows OS-related technical issues on the Gazprom/NIS project within 24 hours, enhancing productivity.
- Helped my colleagues achieve their KPIs and goals by providing targeted support, sharing best practices, and collaborating closely to identify roadblocks early.
- Enabled team members to stay focused and consistently meet their performance targets through regular check-ins, knowledge sharing, and offering assistance on high-priority tasks.
Technologies: Windows System Administration
IT Service Desk Specialist
2015 - 2015
Coca-Cola Hellenic
- Resolved over 90% of IT service management (ITSM) tickets within an SLA by streamlining troubleshooting protocols, enhancing end-user satisfaction.
- Helped resolve over 300 IT support tickets weekly, enhancing ongoing operational efficiency by 25% through timely issue identification and resolution.
- Improved our service desk workflow by analyzing current processes, identifying inefficiencies, and implementing streamlined procedures that reduced manual tasks and eliminated redundant steps.
Technologies: Windows System Administration
Experience
Virtual Machine Sandbox
I created and administered a Windows environment, installing and configuring the needed Front Arena products. I also distributed the virtual machine to other teams via FTP, cloud solutions, or SharePoint, and added custom and major updates for Front Arena, Windows, or VMware Workstation Player.
Windows OS Implementation and Service Desk Outsourcing
TASKS
• Preparation, configuration, and maintenance of Windows 10 images
• Process improvement
• Problem assessment and recovery
• Incident management
• IT services delivery
• Outsourcing
• ITSM Tool CA SDM Administrator
• Problem analysis
• Preparation, configuration, and maintenance of Windows 10 images
• Process improvement
• Problem assessment and recovery
• Incident management
• IT services delivery
• Outsourcing
• ITSM Tool CA SDM Administrator
• Problem analysis
Education
2010 - 2014
Bachelor's Degree in Information Technology
Faculty of Informational Technologies - Belgrade, Serbia
Certifications
NOVEMBER 2020 - PRESENT
Certified Agile Leadership I
Scrum Alliance, Inc.
Skills
Tools
Jira, VMware, Checkmarx
Languages
Java
Platforms
Windows, Windows Server, Citrix
Paradigms
Agile
Other
Windows System Administration, IT Security, ServiceNow, Vulnerability Management, Cisco AnyConnect, RSA SecurID, Big Fix, OMNI
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