Main Missions

• Ensure the administration, maintenance, supervision, and security of the company's information systems and networks, guaranteeing their availability, performance, and compliance with current security standards and policies.
• Implement, operate, and evolve IT security devices (firewall, antivirus, access management, log analysis, vulnerability management, etc.).
• Install, configure, administer, and optimize servers (physical, virtual), network equipment (switches, routers, Wi-Fi access points), storage solutions, backups, and monitoring tools.
• Manage security and operational incidents, provide level 2 and 3 technical support, and coordinate remediation actions.
• Conduct regular security audits, check configuration compliance, and propose improvement plans.
• Participate in defining, implementing, and evolving technical security documentation, in connection with the CISO.
• Ensure continuous technological monitoring of threats, vulnerabilities, and security solutions.
• Raise awareness, train, and assist users in best security practices and the use of IT tools.

Systems and Network Administration

• Installation, configuration, administration, and maintenance of operating systems (Windows Server, Linux), application servers, databases (e.g. NoSQL, MariaDB, MSSQL), and virtualization solutions (e.g. VMware, Nutanix, Hyper-V).
• Administration of network equipment: Cisco, Checkpoint, Wi-Fi access points (e.g. Cisco, Alcatel Lucent), advanced VLAN management, routing, DHCP, DNS, NPS, 802.1x, Active Directory, Azure AD, Office 365.
• Supervision and monitoring of the infrastructure (e.g. WSUS, Intune, Zabbix).
• Backup management (e.g. Veeam, NAS Synology), restoration, business continuity and disaster recovery tests (BCP/DRP).
• Drafting, updating, and applying operational, security, and crisis management procedures.

Infrastructure Security

• Application of CCB (CyFun) recommendations and best practices from vendors.
• Implementation and management of security devices: firewalls, antivirus (e.g. Trend Micro, Kaspersky, Defender), IDS/IPS, access and rights management, system hardening.
• Monitoring security alerts, log analysis, detection and management of security incidents.
• Participation in the development and activation of contingency plans and degraded procedures in the event of a major incident.
• Configuration control and audit of workstations, servers, and local networks, risk management.

Support, Assistance, and Training

• Handling and resolution of technical and security incidents (levels 2 and 3).
• Assistance and advice to users on endpoint security (backups, passwords, antivirus protection).
• Drafting technical notes, incident reports, training manuals, and tutorials.
• Training and raising user awareness of best security practices.

Technical Skills

• Advanced administration of Windows, Linux, M365, Hybrid Cloud systems.
• Mastery of networks (e.g. Ethernet, VLAN, TCP/IP, routing, DHCP, DNS, Wi-Fi).
• IT security (e.g. firewall, antivirus, vulnerability management, IDS/IPS, hardening, CIS, OWASP).
• Proficiency in DevOps and automation tools: Git, Jenkins, GitLab CI, Ansible, Terraform, Docker, Kubernetes, etc.
• Knowledge of virtualization principles (e.g. VMware ESX, Nutanix, Hyper-V), storage (e.g. NAS, SAN), backup/restore (e.g. Veeam, PowerShell/Bash scripts).
• Experience in supervision and monitoring (SOC/SIEM, Microsoft Defender, Zabbix).
• Database administration (such as MariaDB, MSSQL, PostgreSQL).
• Expertise in scripting (Python, Bash, PowerShell).
• IT project management, ITIL best practices.

Personal Qualities

• Adaptability and stress management: Ability to work effectively under pressure, manage emergency situations, and adapt to changes.
• Thoroughness and organization: Attention to detail, methodical approach, ability to prioritize tasks and comply with regulations and confidentiality.
• Analytical mindset and problem-solving: Ability to diagnose, analyze, synthesize, and be proactive in finding solutions.
• Communication and teaching skills: Excellent interpersonal and writing skills, ability to simplify technical information and collaborate effectively with various stakeholders (technical and non-technical teams).
• Autonomy and team spirit: Proactivity, autonomy in work while having a strong ability to integrate and contribute within multidisciplinary teams.
• Curiosity and vigilance: Willingness to learn, intellectual curiosity, and ability to stay informed about developments in the field.

Education and Experience

• Significant experience (minimum 3 to 5 years) in systems, network, and security administration.
• Certifications appreciated: Cisco (CCNA/CCNP), Microsoft (MCSA/MCSE), security (CEH, CISSP), ITIL, ISO 27001.