Brahim Chakroun - Systems & Infrastructure Engineer

Profil Professionnel

Holder of a Master's degree in Cybersecurity with 4 years of experience in systems and infrastructure administration, I specialize in implementing robust best practices ensuring system security, availability, and performance.

Experienced with Microsoft technologies and hybrid environments, with practical experience managing cloud and on-premises infrastructure.

Cybersecurity & Defense

Hybrid Cloud & Azure

Infrastructure & Virtualization

Networks & Security

Project Management

Support & Training

Expérience Professionnelle

Network and Systems Administrator

ZITOUNA TAKAFUL Insurance – Le Kram, Tunisia

2023 – Présent

Azure Local (Azure Stack HCI): Deployed, configured, and managed on-premises hyperconverged infrastructure integrated with Microsoft Azure services.
Virtualization & Storage: Managed a 4-node Dell server Failover Cluster running Hyper-V, connected via SCSI to a shared Dell SC storage array.
Backup Strategy & Data Protection: Designed and managed a 3-2-1 backup strategy using Commvault, ensuring data protection and backup integrity.
Disaster Recovery & Business Continuity: Managed HCI cluster replication to a secondary disaster recovery site over an MPLS connection, defined and validated RTO/RPO objectives, and conducted disaster recovery tests to ensure service continuity.
Microsoft 365, Identity & Endpoint Management: Administered and secured Microsoft 365 environment, managing Microsoft Entra ID, Intune, and Exchange Online, including identity and access management, device compliance, and endpoint configuration.
SQL Server Migration & High Availability: Collaborated with the Data team to migrate 54 databases from SQL Server 2016 to SQL Server 2022 and implement Always On Availability Groups to enhance database availability and resilience.
Cybersecurity & SIEM: Administered Microsoft Defender XDR and Microsoft Sentinel, supporting security monitoring, threat detection, and incident investigation.
Network & Access Management: Managed switching infrastructure, VLANs, Wi-Fi networks, and Cisco Identity Services Engine (ISE).
Technical Support & Monitoring: Delivered Level 2 technical support, performed proactive infrastructure monitoring, and contributed to service continuity and operational stability.

Systems Administrator

International Civil Aviation Organization (ICAO) – Tunis, Tunisia

Fév. – Août 2023

Windows Server & High Availability: Administered a 2-node Windows Server Failover Cluster to ensure infrastructure availability and service continuity.
SQL Server & High Availability: Managed SQL Server Always On Availability Groups across two servers to support database availability and resilience.
Network Security & Firewall Management: Configured and optimized FortiGate 100F firewall policies to strengthen network security and control traffic flows.
ERP & File Server Administration: Administered ERP systems and file server infrastructure, ensuring reliable access to business applications and shared resources.
IT Support & Active Directory: Provided technical support and managed Active Directory user accounts, groups, and access permissions.

Cybersecurity PFE Intern – Oil & Gas Industry

OMV – Nawara Project – Gabès, Tunisia

Fév. – Mai 2022

Network Architecture & High Availability: Analyzed three-tier network architecture and high-availability designs to assess infrastructure resilience and identify potential improvements.
Network Segmentation & Access Control: Worked on network segmentation across DMZs and VLANs, leveraging Cisco ISE to strengthen network access control and security.
SIEM & SOC Implementation: Monitored security events using Splunk SIEM and contributed to SOC implementation using Security Onion for centralized security monitoring and threat detection.
Threat Hunting & Endpoint Security: Conducted threat-hunting activities using CrowdStrike Falcon to investigate suspicious behavior and identify potential security threats.
Infrastructure Monitoring: Deployed and configured SolarWinds monitoring tools to improve infrastructure visibility, performance monitoring, and incident detection.