Tiiso Ramadumane

• Joining a dynamic and innovative team supporting next-generation Cloud, IP, and Core Network solutions across Middle East and Africa (MEA Region).
• Lead advanced troubleshooting and recovery across Ericsson’s cloud portfolio (CEE, CCD, SDI, SDN), ensuring high availability and operational resilience for multi market enterprise accounts across Middle East and Africa Region.
• Provide advanced support and recovery for Ericsson’s NFV/SDN based cloud infrastructure, ensuring resilience, scalability, and compliance across multi market deployments across Middle East and Africa region.
• Provide technical leadership and deliver innovative products and services to address customer specific requirements.

• Consultanting for Cell C across all Core Domains Infrastructure, CS Core, PS Core, IMS and Subscriber Domain.
• Recovered and delivered a multi-year stalled Core network integration (DMC–Core) by leading cross-domain troubleshooting (Diameter/MAP signaling, DRA/STP routing, Core configuration), introducing architectural corrections, resulting in immediate LTE service activation and improved customer experience.
• Developed a custom Python-based TCAP/MAP decoder to reverse-engineer encoded payloads, providing concrete evidence to challenge incorrect assumptions across cross functional teams.
• Optimized core infrastructure upgrade plan by redesigning the execution plan that was initiated by vendor, to align with ETSI MANO principles (VNFM/VIM) and NFVI fault domain isolation. Eliminated correlated failure risk by restructuring upgrade batches based on HA/N+1 redundancy sets and compute failure domains, enabling seamless rolling upgrades with zero service impact, no VNF failover events, and uninterrupted signaling continuity across core network services.
• Enabled safe execution of Core Infrastructure and Core Network software/capacity upgrades by tracking infrastructure and service level KPIs across virtualized core platforms and producing formal post upgrade validation reports, ensuring successful service continuity and measurable performance compliance.
• Implemented, integrated, and tested Core Network services across all Core Domains including CS Core (VMSC, GMSC, MGW, HLR, EIR, STP), PS Core/EPC/LTE (MME/AMF, SGW/PGW/SMF, HSS/UDM, PCRF/PCF, DRA).
• Produced technical documentation to standardize operations and enable knowledge sharing.
• Optimized customer experience by delivering superior services and effectively troubleshooting issues.

• Planned, designed, and managed multi‑vendor physical infrastructure (Huawei E9000, OceanStor, HPE Synergy, Primera, Mellanox), ensuring scalability, resilience, and compliance with engineering standards.
• Designed and operated virtual infrastructures (Huawei FusionSphere OpenStack, VMware NFV stacks), delivering high availability, optimized resource utilization, and seamless orchestration.
• Configured, secured, and optimized NFVi environments, leading fault management, performance monitoring, and incident resolution.
• Administered and maintained VMware platforms (vCenter, ESXi, NSX‑V, NSX-T, vCloud Director, vRealize, SRM) and Huawei FusionSphere OpenStack tools (ManageOne, eSight, CloudOSS).
• Engineered and supported Mobile Core Networks (Nokia MSS, MGW, SBC, CSCF, TAS, ARC, CBAM; Huawei SBC), covering CS Core, IMS, and subscriber domains.
• Developed and maintained technical documentation (LLDs, HLDs, SOPs) to strengthen governance and enable knowledge transfer.
• Ensured regulatory compliance and security hardening of NFVi and Core Network systems, mitigating risks and protecting against cyber threats.
• Coordinated vendor engagements (Nokia, Huawei, HPE, VMware) for troubleshooting, solution design, and deployment.
• Contributed to capacity planning, migrations, and upgrades, aligning infrastructure evolution with business priorities and future expansions.
• Championed automation and orchestration initiatives, enhancing efficiency and service delivery across NFVi and Core Network systems.
• Used metrics to monitor application and infrastructure performance.
• Provided technical leadership and delivered innovative products and services to address customer specific requirements.
• Prioritized simultaneous projects to perform effectively under shifting deadlines in fast-paced environment.
• Reviewed technical specifications from clients and vendors to confirm adequacy, accuracy and functionality.

• Gained hands‑on experience in CS and IMS Core virtualization using VMware NFV Stack and Huawei FusionSphere OpenStack, supporting next‑generation mobile core environments.
• Assisted in PS Core virtualization and administration of CS Core systems, contributing to daily operations, incident resolution, and preventive maintenance.
• Supported OSS platforms (Nokia CBAM, ARC, RAS), building foundational expertise in telecom cloud orchestration, monitoring, and automation.
• Developed early proficiency in troubleshooting, performance monitoring, and root cause analysis for mobile core voice networks, strengthening resilience and operational readiness.
• Attended training courses to build understanding of processes, techniques, and industry.
• Learned new materials, processes, and programs quickly.

• Learned and adapted quickly to new technology and software applications.
• Interacted with customers under supervision to support operational objectives.
• Established lasting relationships with peers, leadership and customers using strong communication and interpersonal skills.
• Participated in on-the-job training, working closely with seniors and coworkers and asking appropriate questions.
• Supported organizational objectives with help from existing employees.
• Acted as technical contact during Vodacom’s initial Cloud/NFVi introduction, collaborating with Huawei and VMware on planning, design, and blueprint development.
• Contributed to Low‑Level Designs (LLDs), High‑Level Designs (HLDs), architectural blueprints, and integration plans, ensuring alignment with ETSI/3GPP standards and vendor best practices.
• Supported early NFVi adoption, bridging physical infrastructure with virtualized environments, enabling transition to cloud‑native operations.
• Configured, tested, and validated NFVi systems to ensure resilience, scalability, and compliance with engineering and security standards.
• Administered and supported Voice Core systems (Nokia MSC servers, Media Gateways, Huawei SBCs), safeguarding CS Core services across 2G/3G networks.
• Conducted incident resolution, troubleshooting, and preventive maintenance, analyzing system alarm logs to maintain service continuity.
• Configured and optimized CS Core nodes (MSC/VLR) including site creation, re‑parenting, LAC splitting, and upgrades to enhance performance and scalability.
• Implemented and tested roaming configurations on MSC/VLR and HLR, ensuring seamless interconnectivity with partner networks.
• Integrated external systems (call centers, Skype for Business, billing systems, RAN nodes, SCCP carriers, STPs, SMSC) with voice core infrastructure, enabling end‑to‑end service delivery.
• Managed number routing for national and international numbering plans (E.164, E.214, E.212), ensuring compliance and efficient traffic handling.
• Demonstrated a high level of initiative and creativity while tackling difficult tasks.

Assembled and tested PCB components for smart meters, main focus on this project was to assemble Smart Meter Printed Circuit Board (PCB) and test it. Circuits assembled on a smart meter PCB included:

• 4V Supply Circuit.
• GSM, FONA Shield Wiring.
• Pro Mini Wiring.
• SD Card Circuit Wiring.
• Real Time Clock (RTC) Circuit.
• 240V to 7.5V Switching Power Supply (SPS).
• Battery and 7.5V Supply Circuit.
• 5VL Supply.
• Pulse Meter and Sense Monitoring,

Documented test results and performance data, providing insights for product enhancements and quality control improvements.

Provided recommendations for improvements in assembly or testing procedures.

Followed safety protocols while handling hazardous materials.

• Led the development of instrumented products and automated engineering systems (gate control, incubators, remote tank monitoring, smart meters, automated motor control), applying IoT and sensor technologies to enhance operational efficiency.
• Performed diagnostics, monitoring, and preventive maintenance on automated systems, ensuring resilience and continuous performance.
• Designed and developed software, web applications, and sensor applications, expanding into IoT and smart system use cases.
• Conducted research and evaluation of electrical systems, designing test methods and validating system capabilities against engineering and quality standards.
• Adhered to laboratory safety procedures to maintain compliance with quality control standards.
• Participated in research projects by designing and executing experiments.