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Leonid JovanovLJ

Leonid Jovanov

Systems and Network Administrator

€400/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Leonid

Systems & Network Administrator / IT Support with 8 years of experience, I assist companies in the administration, security, and operational maintenance of their IT infrastructures.

I work on multi-site environments as well as on N1/N2/N3 user support needs, IT asset management, virtualization, networks, and cybersecurity. My goal is to provide reliable, secure, and business-adapted solutions while ensuring service continuity.

I can be involved in:
  • Systems and network administration
  • Workstation deployment and management (Intune / Autopilot)
  • N1/N2/N3 user and proximity support
  • Access and security management (MFA, SSO, security policies)
  • Monitoring, backups, and ongoing maintenance
  • Virtualization and infrastructure management
  • Technical documentation and IT process improvement
  • Infrastructure migration or redesign projects

I have also participated in projects related to cybersecurity and ISO 27001 compliance, with a field-oriented approach, focusing on responsiveness and quality of service.
  • English

    Native or bilingual

  • Macedonian

    Native or bilingual

  • Serbian

    Native or bilingual

  • Croatian

    Native or bilingual

Can work on-site
Paris (up to 30km)

Experience

  • AVA6
    Systems and Network Administrator
    January 2024 - Today (2 years and 5 months)
    Paris, France
    • Administration and monitoring of multi-site systems and network infrastructures
    • IT project management and coordination with technical teams
    • Administration and security of M365 and Azure AD environments
    • Management of user accounts, access, and security policies
    • Management of network equipment (Fortigate, Watchguard, Huawwei, Netgear)
    • Administration of the virtualization environment via VCenter
    • Administration and maintenance of NAS storage
    • Implementation of cybersecurity policies and user awareness
    • Incident and request management via Freshdesk
    • Technical documentation and IT process improvement
    • N2-N3 user support
    • Wi-Fi access point management via Ruckus
    • Backup management via Metallic
    • Daily ongoing maintenance
    • Workstation deployment and management via Intune / Autopilot
    • Participation in infrastructure redesign projects
    Windows Server Watchguard Veeam NAS Ruckus
  • Intersec
    Systems and Network Administrator
    January 2023 - January 2024 (1 year)
    Paris, France
    • Administration of a Linux environment (Ubuntu / Debian)
    • Identity and access management via LDAP
    • Deployment and management of IPSec / SSL VPNs
    • Administration of the Proxmox virtualised infrastructure
    • Firewall configuration / Network segmentation switch VLAN
    • Incident management and N2/N3 support
    • Participation in ISO 27001 project (security controls and compliance)
    • Backup management and restoration testing
    • Coordination with Data and Dev teams
    • Writing technical documentation and IT/User procedures
    ISO 27001 User Support Ongoing Maintenance Technical Documentation Onboarding
  • Alpiq
    Systems and Network Administrator
    January 2021 - January 2022 (1 year)
    Paris, France
    • Administration and management of servers and the AD infrastructure
    • Onboarding/Offboarding of new employees
    • Administration and management of M365 user account services
    • N1/N2 user support, IT incident processing and tracking via Freshdesk
    • Management and maintenance of IT assets (workstations and network equipment)
    • Installation and configuration of Wi-Fi access points
    • Analysis and treatment of system vulnerabilities and workstation security via Bitdefender GravityZone
    • Writing technical documents and internal procedures
    • Raising employee awareness on IT security best practices
    • Backup management via Veeam
    Veeam Bitdefender M365 Cybersecurity Awareness Workstation

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Education

  • Systems and Network Engineering Degree
    InstitutF2i-IPSSI
    2022
    Diplôme d'ingénieur Systèmes et Réseaux
  • BTS/Licence
    BTS/Licence

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