Freelancer profile translated to English.
Back to original languageAbout Yasseen
Systems and Network Engineer with over 20 years of experience, I have worked in demanding environments such as banking, services, legal protection, and Defense.
Throughout my career, I have managed the entire IT infrastructure lifecycle: server administration (Windows, VMware, Hyper-V, Citrix), network and security management (LAN/WAN, VPN, Stormshield, Cisco), telephony, monitoring (Centreon), backup (NetBackup), and the execution of strategic technical projects (cloud migration, datacenter relocation, supervision overhaul, MCS/MCO...).
Gradually, I took on leadership roles, with a strong involvement in IT governance, budgeting, team management, and relationships with senior management.
Today, it is only natural that I choose to put this expertise at the service of companies as a freelancer, to support them flexibly and with commitment in their challenges of evolution, security, or transformation of their IS.
Rigorous, reliable, attentive, and results-oriented, I seek to establish a lasting relationship of trust with my clients, in a spirit of service and performance.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- HENSOLDT Cyber GmbHSystems and Network EngineerDEFENSE AND MILITARYMay 2022 - Today (4 years and 3 months)Plaisir, FranceParticipation in defining and implementing the IS security policy (PSSI)Monitoring of MCO/MCS and infrastructure security planAdministration of Stormshield / Cisco ASA firewalls, network segmentation, and secure VPNsManagement of security incidents and monitoring of network traffic (Stormshield, Cisco ISE, WSA, ESA)Management of digital certificates, PKI key ceremonies, and VPNs for remote usersBitLocker administration, USB key encryption, antivirus exclusions, and workstation securityAnalysis of suspicious network traffic (Wireshark) and security vulnerability managementDeployment and management of security solutions: EDR (HarfangLab), whitelisting (Tyrex)Antivirus migration: Trellix on workstations, Trend Micro on serversContribution to GDPR and ISO 27001 complianceAdministration of VMware vSphere servers (SimpliVity), ESXi, vSAN, NSX, and migration to NutanixStorage and backup management (NetBackup, Synology), network quotas (FSR), Fileshare, QuantumSCCM deployment, software installation and updatesCUCM telephony administration and secure Android mobile fleet management (CryptoSmart)Wi-Fi management, VLAN configuration, network ports, and network coreExchange administration (shared mailboxes, forwarding, connectors) and Webex (user support)ARAS administration, user rights modification, and GPO configurationDesign of a secure systems and network architectureManagement of supplier relationships and monitoring of service providersSupervision of a team of technicians and project coordinationWriting technical procedures
- Groupama Protection JuridiqueAssistant IT ManagerBANKING AND INSURANCESeptember 2011 - April 2022 (10 years and 7 months)Nanterre, FranceInfrastructure management and functional supervision of the technical teamOptimization of IT processes and implementation of performance indicators (SLA, quality of service)Monitoring of supplier relationships and management of service providers for hardware, software, and servicesParticipation in defining and monitoring the company's BCP/DRPManagement of IT purchases and stock, invoice processing via SAPIT Project ManagerManagement and execution of IS projects: relocations, private cloud migrations (Windows servers)Migration of 200 user workstations from Windows 7 to 10, Office 365 migrationInstallation and configuration of the Kiamo call centerCoordination of external stakeholders: applications, telephony, internet, printersMonitoring of internal and external inter-application flows (EDI, interfaces, Editique)Writing technical procedures and implementing business processesSystems and Telephony AdministratorAdministration of Hyper V virtual servers, Citrix XenServer (with Inwebo)Administration of application servers (Exchange, IIS, Weblogic, SQL Server, Qlikview)Telephony administration (PABX 8770 Omnivista, CCSupervision) and Kiamo AdministrationManagement of operational incidents, logs, batch jobs, and error messagesAdministration of systems and user rights (Active Directory, applications)Continuous monitoring of the IS and service improvement (Proxy, VLAN, LAN, WAN, DNS, DHCP)Backup and business continuity managementTechnical and functional support for users (PC, tablet, phone, smartphone)User training on tools and IT security awareness
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Education
- BTS in Computer Science Management, option Enterprise Systems and Network AdministratorLycee Jules Ferry2006
- Microsoft Certification: Windows Server 2012 AdministrationIp formation2016