What I’ll be doing – your accountabilities

Role Summary

Own lifecycle operations for 4G/5G Enterprise Packet Core nodes. Also specialize in Nokia SR OS-based IP/MPLS networks and NFM-P operations: including audits, remediation, vendor coordination, and risk-controlled upgrades. Ensure stability, security, and performance through automation, observability, and disciplined change control.

• Provides technical concurrence and sign off for high profile and/or critical network changes on major BT core platforms and/or customer bids; accountable for managing technical risk for major platforms.
• Provides consultancy on network designs for multiple platforms and/or solutions and/or customers                                      
• Develops design patterns across multiple domains.
• Responsible for establishing design best practice within a unit.
• Responsible for estimating the time and type of resource needed to support deliverables for complex, high impact and high value projects.
• Drives Right First-Time solutions and leads lessons learned
• Proposes technical strategy to network platforms and/or customer solutions factoring in high impact and high risk as appropriate.
• Drives efficiency and scalability through the re-use of network designs and accountable for the design whilst it is deployed across the overall network platform and/or customer solution.
• Potentially leads a large matrix team (virtual) and is accountable for complex network development using innovative approaches to design (including cross-portfolio solutions). Leverages technical resource/s as required to deliver the solution. 
• Decides on design scope and design to leading edge high impact and high-risk network platforms and/or customer solutions
• Audit & Install Base: inventory Packet Core Nodes, licenses, versions, dependencies
• Remediation: resolve routing/subscriber database/QoS issues, security baselines; troubleshoot EPC/5GC signaling/session problems and database replication
• Lifecycle Upgrades: plan/execute software upgrades (schema migrations, config freezes, interop testing) from lab → pilot → production
• Audit & Install Base: inventory Nokia SR OS devices (7750/7705), releases, line cards, license keys, HA, and NFM-P components
• Service Audit: document L2/L3 VPNs, VPLS/EVPN, QoS policies, OAM, BFD, telemetry/alarms; validate compliance
• Remediation: resolve routing instabilities, LDP/RSVP/SR issues, QoS defects, MTU mismatches; fix HA/ISSU configurations
• Lifecycle Upgrades: plan/perform Nokia SR OS and NFM-P upgrades/patches, using ISSU/hitless strategies where supported; manage pre/post checks and rollback
• Scripting & Automation: automate audits/compliance and mass changes via MD-CLI scripting, NETCONF/gNMI, Python/Ansible; integrate with NFM-P APIs
• Risk Management: craft traffic reroute plans, staged upgrades, failover testing, and thorough rollback procedures
• Vendor Engagement: work with Cisco, NetNumber and Nokia teams on constraints, field notices and recommended upgrade paths; complete impact assessments
• Scripting & Automation: build Ansible/Python playbooks for config validation, backups, compliance, health checks, and API-based changes (NETCONF/RESTCONF)
• Risk Management: define change windows, traffic steering/bypass, rollback/fallback routing; maintain risk registers and detailed MOPs
• Security & Compliance: lifecycle, segmentation, logging; track vulnerabilities and apply timely remediations
• Observability: maintain dashboards/alerts (latency, loss, success rates) and baseline KPIs for core interfaces
• Documentation & Recommendations: deliver execution plans, risk assessments, impact analyses, and optimization recommendations
• Decides on network models for design testing.
• Decides on approach to resolving customer affected issues to leading edge high impact and high-risk network platforms and/or customer solutions, as appropriate.
• Resolves in-life issues to high risk and high impact network platforms and/or customer solutions, as appropriate
• Decides how to re-use network designs.
• Decides on implementation approaches of technology related transformation activity.

Skills required for the job

Provide detailed information on any qualifications, technical expertise or security clearance that you will need for the job. (See example statements below).

• Minimum 10 years of relevant experience in Mobile Network domain
• Minimum 10 years of relevant experience in IP Routing and IP/MPLS domain
• Strong understanding of 4G and 5G packet core domain
• Minimum 5-8 years of hand on experience in Nokia 4G/5G CMU (Compact Mobility Unit) product.
• Minimum 5-8 years of hand on experience in Cisco 4G/5G Packet Core product.
• Minimum 5-8 years of hand on experience in NetNumber HSS.
• 5–8+ years operating Nokia SR OS IP/MPLS networks and NFM-P Minimum.
• Hands-on NFM-P administration, backups, device onboarding, job scheduling
• Scripting (Python, Ansible) and model-driven ops (NETCONF/YANG, gNMI)
• Strong change management and risk/rollback practices
• Good to have working experience on enterprise and mobile private networks
• Key achievements in technical expertise on his/her domain. 

Common Deliverables:

• Install Base Report: HW/SW versions, licenses and dependencies
• Remediation Plan: defects found, risk, timeline, and expected outcomes
• Lifecycle Upgrade Execution Plan (MOP): steps, validations, rollback, comms
• Risk Register: risks, impact assessment, mitigations
• Post-Change Report: KPI deltas, incident summary, lessons learned
• Automation Assets: scripts/playbooks, runbooks, documentation

Preferred / Bonus:

• Cisco StarOS Specialist
• NetNumber Specialist
• Nokia CMU Specialist
• NOKIA SRC/NRP certifications: NRS II

Experience you would be expected to have

• Able to deliver significant stakeholder influence to resolve problems. Expected to give technical guidance to others to help resolve issues outside of the domain of the role.
• Acts as a point of contact for technical expertise to advise senior stakeholders, internal and external.
• Help to identify minimum data fields (across all stages) required from both customer and inventory systems from a technical designer perspective
• Identifying dependencies and system integration required to build the work-flow and work with appropriate teams to get the same implemented.
• Expert user of design tools; seeks opportunities to develop new design tools for BT, and for external adoption.
• Makes authoritative recommendations on tools and processes for network platforms and/or customer solutions, where appropriate.
• Able to solve problems typically specific to leading edge high impact and high risk network platforms and/or customer solutions.
• Able to solve complex and unknown problems that may lie outside the domain of the role. Problems may impact a single network platform and/or customer solution supporting multiple services. The most complex problem will be platform wide, impacting multiple services (and include multiple vendors) or cross-portfolio solutions.
• Impact of decisions are specific to the design strategy and/or direction for leading edge high risk and high impact network platforms and/or customer solution.
• Evidence of successful transformation measures – e.g. Network upgrade success rate with minimal customer impact.
• On-time delivery of plans, risk assessments, and recommendations
• Mentors and share knowledge with others.