FTTH Security Expert

About P1 Security

Founded in 2011 by serial entrepreneur and security expert Philippe Langlois P1 Security is on a mission to secure critical and sovereign mobile networks by providing services and technologies to identify detect and recover from critical threats and vulnerabilities.

P1 Security is one of the very few companies in the world tackling telecom security through pure Mobile and Telecom Security attacks and security from 5G and Cloud-based infrastructure Security OpenRAN Network Slicing and RAN Sharing Edge Computing (MEC) down to legacy 2/3/4G Diameter SS7 SIGTRAN attacks GTP manipulation and fuzzing.

Our offering and expertise range from Network and Telecom Core Network Security Intrusion Detection and Vulnerability Assessment solutions with technology backed by more than a decade of engineering research. We are a lean scale-up engaged in emerging markets (Eastern Europe Middle East Asia) Europe and North America.

The P1 Security team includes experts from telecom operators and security companies as well as renowned security researchers who regularly present unique P1 Security research at leading international security conferences & GSMA working groups. P1 Labs the R&D branch of P1 Security shares Open Source initiatives with the telecom security community ( are growing the team with people who want to help write it. We are looking for experienced profiles with grounded hands-on knowledge of telecom networks and a real appetite for FTTx technologies in particular. Curious creative and open-minded people who want to dig deep into a genuinely sovereign topic: the security of the mobile networks our connectivity runs on.

If your years have been spent in FTTx access networks PON CPE provisioning field operations and security has always been the question you kept coming back to talk to us. The role described below does not really exist as a box to tick yet: we care far more about the person than about an exact match with a job title. Bring the part of the picture you know best and we will build the rest together.

• Audits you will plan and run scoped authorized penetration tests of FTTH/PON infrastructure: OLTs ONTs/ONUs the management systems around the ODN and customer premises equipment.

• PON internals you will dig into GPON XG-PON XGS-PON and NG-PON2: OMCI PLOAM and how ONTs are authenticated and provisioned.

• CPE and gateways you will take them apart: firmware extraction and reverse engineering exposed debug interfaces (UART/JTAG) hardcoded credentials update mechanisms and web/CLI management flaws.

• Subscribers at scale you will look at what provisions and manages them (TR-069/CWMP TR-369/USP ACS/OSS/BSS integrations zero-touch provisioning) and at the subscriber-facing edge: BNG/BRAS PPPoE/IPoE DHCP RADIUS/AAA VLAN segmentation QoS and isolation between subscribers.

• Convergence and infrastructure you will follow fixedmobile convergence (5G FWA shared core shared OSS/BSS unified identity and billing) and review devices and management planes (routers switches aggregation equipment NMS/EMS SNMP NETCONF/YANG SSH/Telnet APIs privileged access) against vendor and industry hardening baselines.

• Threat modeling you will map attack paths for real operator environments using frameworks such as MITRE ATT&CK the GSMA FASG/ guidance and the MITRE FiGHT knowledge base.

• Findings and clients you will turn all of this into clear prioritized reports with proof-of-concept evidence risk ratings and actionable remediation present them to stakeholders and support remediation verification and retesting.

• The team you will contribute to our internal tooling test methodologies lab environments and reusable attack playbooks.

• Deep knowledge on Fixed-line network architecture (FTTx DSL Coaxial)

• MANDATORY: Experience in security audit pentests on OT and IT infrastructure

• Experience with vendor ecosystems such as Huawei ZTE Nokia Ericsson Calix or Adtran FTTH equipment.

• Familiarity with telecom security standards and frameworks: 3GPP SCAS GSMA NESAS ISO/IEC 27001 NIST CSF and ITU-T/BBF specifications.

• Experience in red teaming or adversary emulation against critical infrastructure.

• Relevant certifications such as:

• OSCP / OSEP / OSWE / OSED

• GPEN / GXPN / GRID

• CEH (Practical) eJPT/eCPPT or CRTO

• Telecom-specific training (GSMA Black Hat/DEF CON telecom or hardware trainings)

• Published research CVEs conference talks or bug bounty history in telecom or embedded devices.

If you have a passion for telecom security and want to be part of a dynamic and innovative team we encourage you to apply and join us in shaping the future of Telecom Security!

• English - fluent speaker

• French - optional

• Headquarters: Fully remote company with headquarters in Paris - FRANCE

• Remote policy:

• At P1 Security we recognize the importance of work-life balance and thats why our remote policy is a key part of our company culture. We understand that flexibility is crucial allowing our team members to work remotely while achieving their personal and professional goals. To keep our team connected we schedule monthly meetups with department members and gather the entire team on-site every two months. These regular touch points ensure effective communication collaboration and a dynamic team spirit reflecting the dynamic and adaptable spirit of P1 Security. We believe in the power of flexible work arrangements to bring out the best in our team driving success in a way that suits everyones unique lifestyle

• First contact call (10-20min)

• Direct manager call (30min)

• Capability assessment exercice (depending on position)

• C-level & Director call (30 min)

Telecommunications Security SS7 SIGTRAN LTE IMS UMTS CDMA GPRS OpenStack Kubernetes LinuxServers / PNF Diameter NFV Security VoLTE VoWifi GTP Diameter 3G 4G IoT Security NFV(i) S1AP X2AP Fuzzing eUTRAN S1AP X2AP NgRAN NGAP PFCP 5GC SBI

If you are a motivated and experienced professional who is passionate about cybersecurity and driving innovation we would love to hear from you! Join P1 Security and be part of a fascinating mission to protect critical infrastructure and work alongside industry experts in the cybersecurity field.