Freelancer profile translated to English.

Description

Independent consultant in networks, VoIP/ToIP, and cybersecurity, I cover a rare combination on the market: voice and data, from the SIP protocol to infrastructure security.

On the voice side, I intervene in SIP/ToIP interoperability validation and operator trunk diagnostics (SIP, RTP, SDP), with detailed Wireshark analysis and compliance checks against operator specifications.

I have applied this expertise to a wide variety of IPBX systems: Asterisk, 3CX, Wildix, Alcatel OXE/OXO, Mitel, Avaya, Wazo, which allows me to adapt quickly to the client's environment rather than depending on a single technology.

On the security side, I harden firewalls (pfSense, Fortinet, Palo Alto, Stormshield, Cisco ASA), deploy ELK/PFELK SIEMs with Suricata IDS, and assist in making network infrastructures compliant: VLAN, QoS, site-to-site VPN, Active Directory, VMware virtualization.

I also enjoy automating what can be automated: diagnostic scripts, report generation, local AI integration to speed up analysis without exposing client data.

The objective is always the same: save time on repetitive tasks to focus on what requires real expertise.

Regularly practicing CTFs and offensive challenges (Root-Me, TryHackMe top 3%), I maintain an active watch on current threats.

Available for one-off or recurring missions, in the Île-de-France region or remotely.

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

ILEXIA
Networks & Cybersecurity Engineer
October 2024 - Today (1 year and 9 months)
Paris, France
• ToIP interoperability validation on MPLS/OTT SIP trunks (SFR operator): approximately 15 cycles in 18 months — Wildix, Asterisk, Alcatel OXE/OXO, Mitel 5000, 3CX, Wazo, Avaya IP Office.
• SIP/RTP protocol analysis under Wireshark (.pcapng): compliance with operator specifications, SIP response codes, media flows; client compliance reports.
• End-to-end ELK/PFELK SIEM deployment: Logstash pipelines, ECS normalization, Suricata IDS (eve.json), Kibana dashboards, and alerting (pfSense, ESXi, OpenVPN).
• Hardening of production pfSense firewall: reduction of permissive rules, separation of production and test networks.
• PoC of local sovereign AI (vLLM + LangChain): RAG chatbot on internal documentation, without data exfiltration.
Telecommunications VoIP Network Administration Information Security
Elit-Technologies
Systems & Network Administrator
July 2023 - July 2024 (1 year)
• End-to-end ToIP, network, and security client projects (including multi-site Micro-Folie deployment); L1/L2/L3 support for approximately 100 devices (major accounts).
• Deployment and configuration of Cisco Catalyst, Meraki, and UniFi switches, routers, and access points (UDM Pro).
• Firewalls and VPNs on pfSense, Cisco ASA, Fortinet, Palo Alto: rules, site-to-site tunnels, remote access.
• Webex and Microsoft Teams Rooms video conferencing rooms (Poly equipment): installation, configuration, preventive maintenance visits.
Talentia Software
Project Manager — IT Service Management
January 2023 - March 2023 (2 months)
92400 Courbevoie, France
• ITSM Freshservice deployment for 250 employees (France/Italy): incident and service request management.
• Specifications and knowledge base; coordination in English with the international IT team.