Accountabilities
As an FTTH Security Expert, you will investigate and assess vulnerabilities across fiber access networks, telecom infrastructure, and associated management systems, translating your findings into actionable security improvements.
Security audits and penetration testing: Plan and conduct scoped, authorized penetration tests of FTTH and PON infrastructure, including Optical Line Terminals (OLTs), Optical Network Terminals (ONTs/ONUs), Optical Distribution Network (ODN) management systems, and customer premises equipment.
PON protocol and infrastructure analysis: Investigate GPON, XG-PON, XGS-PON, and NG-PON2 technologies, including OMCI, PLOAM, and the authentication and provisioning mechanisms used for ONTs.
CPE and gateway security: Analyze customer premises equipment through firmware extraction and reverse engineering, examining UART/JTAG debugging interfaces, hardcoded credentials, firmware update mechanisms, and web or command-line management vulnerabilities.
Subscriber management security: Assess subscriber provisioning and management systems, including TR-069/CWMP, TR-369/USP, ACS/OSS/BSS integrations, and zero-touch provisioning.
Network access and segmentation: Examine subscriber-facing infrastructure such as BNG/BRAS, PPPoE/IPoE, DHCP, RADIUS/AAA, VLAN segmentation, QoS, and isolation between subscribers.
Fixed-mobile convergence: Investigate security considerations involving 5G Fixed Wireless Access (FWA), shared network cores, shared OSS/BSS platforms, unified identity systems, and billing infrastructure.
Network infrastructure assessment: Review routers, switches, aggregation equipment, NMS/EMS platforms, and management interfaces, including SNMP, NETCONF/YANG, SSH/Telnet, APIs, and privileged access mechanisms, against vendor and industry hardening standards.
Threat modeling: Map realistic attack paths in telecommunications environments using frameworks and resources such as MITRE ATT&CK, GSMA FASG/FS.xx guidance, and the MITRE FiGHT knowledge base.
Reporting and remediation: Produce clear, prioritized security reports containing proof-of-concept evidence, risk assessments, and actionable remediation recommendations. Present findings to stakeholders and support remediation verification and retesting.
Research and methodology development: Contribute to internal security tools, testing methodologies, laboratory environments, and reusable attack playbooks.
Requirements
The ideal candidate combines deep knowledge of fixed-line telecommunications architecture with proven cybersecurity auditing and penetration-testing experience. You should be comfortable investigating complex technical environments, identifying practical attack paths, and communicating security findings clearly.
Strong knowledge of fixed-line network architectures, particularly FTTx, DSL, and coaxial technologies.
Mandatory: Proven experience conducting security audits and penetration tests across both IT and OT infrastructure.
Practical understanding of FTTH and PON technologies, including their architecture, protocols, equipment, and provisioning processes.
Experience with telecommunications equipment and vendor ecosystems such as Huawei, ZTE, Nokia, Ericsson, Calix, or Adtran.
Familiarity with telecommunications security standards and frameworks, including 3GPP SCAS, GSMA NESAS, ISO/IEC 27001, NIST CSF, and ITU-T/BBF specifications.
Experience in red teaming or adversary emulation targeting critical infrastructure.
Strong technical capabilities in infrastructure security assessment, vulnerability analysis, and penetration testing.
Fluent English communication skills, both written and spoken.
French language skills are optional.
Relevant certifications and additional experience are advantageous:
Offensive security certifications such as OSCP, OSEP, OSWE, or OSED.
GIAC certifications such as GPEN, GXPN, or GRID.
Practical certifications such as CEH Practical, eJPT/eCPPT, or CRTO.
Specialized telecommunications security training, including GSMA programs or telecom and hardware-focused training from Black Hat or DEF CON.
How Jobgether works
We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.
We appreciate your interest and wish you the best!
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