General information- location: torre diana (mexico city) - work mode: hybrid – 3 days onsite per weekrole objectivedesign and execute the phased migration and coexistence of commercial offers from the current pgw/pcrf platform to a new multivendor solution (vendors under selection), ensuring service continuity and end-to-end integration with network elements, including ocs (charging) and roaming.additionally, define and document the operational process for the design, configuration, testing, and deployment of future commercial offers in a multivendor environment.key responsibilities- gather and document the baseline configuration of current commercial offers in pgw and pcrf (apns, rulebases, ruledefs, throttling policies, etc.). - define target multivendor architecture (coexistence, segmentation by apn/offer/region). - define interaction models: pcrf pgw (gx); pgw ocs (gy); pcrf ocs (sy) - identify dependencies and integrations across pgw, pcrf, and ocs in a multivendor setup. - build a configuration mapping/migration matrix between current and new vendors. - design and implement phased migration plan with success criteria and rollback strategy. - define and execute end-to-end testing plans for commercial offers. - validate roaming scenarios (cobex, extended home, international roaming). - design a standardized offer template portable across vendors. - produce knowledge transfer materials (documentation, checklists, troubleshooting guides, kpis, logs, traces).deliverables- multivendor architecture design documents (pgw, pcrf, ocs) - inventory of commercial offers - multivendor equivalency matrix (features/parameters/commands) - migration and rollback plans - test plans and evidence - standard configuration procedures (templates, checklists, change control) - operations and troubleshooting guidetechnical requirements (must-have)- 7+ years in epc / mobile core; 3+ years as technical lead / sme - proven experience with pgw and pcrf in at least one vendor: - cisco, nokia, ericsson, oracle - lte / 5g technologies and ims systems - protocols and interfaces: - s5/s8, s11, gx, gy, sy - strong knowledge of: - qos (qci/arp), bearers, session management - nat / cgnat, ipv4 / ipv6 - integration and troubleshooting with ocs (online charging)nice-to-have- automation / standardization (scripting, templates, ansible, python)education- degree in telecommunications, electronics, systems engineering, or related field - vendor certifications (cisco/nokia/ericsson/oracle) are a pluskey protocols- lte: s5/s8, s11, sgi - 5g: n4, n6, n11, n7, nchf - policy & charging: gx (pcrf), gy (ocs), sy - ip/networking: ipv4/ipv6, nat/cgnat, dnstools- packet capture and analysis (pcap/wireshark), logs/kpi analysis - viavi, prime, grafana - (nice to have) scripting/automation (python, ansible)skills- network design and architecture - troubleshooting and analytical thinking - leadership and proactivity - teamwork and effective communication - decision-makingcore responsibility summarylead the migration and coexistence of commercial offers at pgw/pcrf level toward a multivendor solution, ensuring service continuity and establishing a standardized operational process for future offers aligned with business needs.