Simbarashe Nyajeka

Responsible for integrating and maintain Convergent Charging System, E2E technical management including technical support, upgrade, maintenance, Availability, emergency handling. Service request, healthy checks and integration
Key Achievements:
 Technical and workarounds, resolution
 Trouble ticket and customer complaint handling
 System and application performance management
 Automation using Unix shell scripts and PLSQL
 Voucher Management (Activation, Generations, Data Analysis, Automation)
 Bhealthy Dashboard and Alarm designs
 Huawei ETL development, metadata , data source/flow designs
 Risk identification and closure of technical issue, coordinating customer complaints
 Support other third parties related issues eg Recharges

Troubleshoot/Support custom CELLC SOA, oracle billing application written in PLSQL, UNIX and Java Develop Automation patches & fixes in PLSQL.Root cause of billing application escalated incidents/service request along with recommending and driving solutions that improve accuracy/efficiency and working instructions for critical issue. Providing technical support during standby period shifts/normal client escalations through Fresh-Desk ticketing system
Key Achievements:
 Supporting CellC SOA , Provisioning, Rica, MNP for MVNO (FNB, MVNX, SBSA, MRP and Cellc )
─ Soap UI, SOA technical issue handling, reports and interface issues with third parties, TJ, AirVantage, Black, PayFast, Huawei (CRM, CBS), MVNO’s End points issue
 Expert level support for billing application escalated incidents/service request and drive improvement initiatives: Highlights below
─ Mediation, cdr loading into DB tables, Rating, Bill run, Invoicing, documentation extraction/generation, domain (glassfish) and third party integration/API issue/incidents. PLSQL Procedure and Package debugging/modifications and bug identification
 Providing data/logs for analysis, statistics, and reports (RCA)
 Monitoring and maintenance perform daily monitoring verifying the integrity, availability and completion of business critical processes and integrations eg extractions, billruns
 Responded quickly to client’s after researching client's issues; implemented effective solutions by providing customer with recommendations and action plans.
 Technical guidance and recommendation to clients
 Linux commands usage for logs analysis and monitoring system performance and availability
 Collaborate with Developers to bring new functionality and recommendations on application.

• BSS (CBS, OCS, EVC, Mediation) and VAS (SMSC, MMSC, USSD) application operations.
• Monitoring application performance (KPI), capacity dimensioning and availability)
• Root cause analysis of BSS and resolution with SLA (Incident and Problem Management)
• Develop best practices (ITIL) and procedures for BSS/IT operational activities
• Daily, weekly and monthly service/KPI, traffic reports generation, analysis and review.
• Operation acceptance and change evaluation as CMB ( Change Management Board)
• Manage Service Desk trouble tickets and provide support
• Continuous Service improvement eg alarm and event correlation and automation
• Business requirements analysis and enhancements
• Responsible third party system integration configuration, testing and maintenance
• Interface with business for operational issues and escalations

• Routine system preventive and operational maintenance of Huawei BSS and VAS
• Proactively monitoring and managing Online Charging Services and BSS availability of 99, 99%
• Resource optimisation, capacity utilization and change/incident management
• Testing, implementation and integration of new systems/products/rewards, patches and short codes.

• Implementing and Configuration Huawei AAA, SMSC and OCS
• Acceptance and SIT Testing of OCS- Prepaid Platform and integration testing

• Supporting eServGlobal -(USMS, SCP, SLEE, UPI, and UBE(Billing) nodes
• Billing, Charging and Revenue Issue Resolution, Configuring Billing Periods/Rates,
• PL-SQL, Perl, Unix scripts to manipulate flat files and EDRS extractions
• Subscriber Provision, RBT troubleshooting and SMS, User profile creation
• Upgrades and Faulty Fix Implementation, Control plans modifications Regression testing, Launching New Promotions
• Solaris 5.9, Oracle administration (Start/Shutting Down, Troubleshooting, Tablespace Management, Constraints management
• Voucher Creation, Activation, Freezing and troubleshooting recharge (USSD, IVR problems), Informix Recharge Database sanity checks
• SLEE restarts, Camel Roaming Configuration (Outbound), Snoop Tracing and Call Tracing, Troubleshooting Networker Backup (Media Volumes, Inventory)
• Acceptance Testing, Testing and Verifying customer request changes, Sigtran ASP/AS recreation and restarts
• System Monitoring (log file monitoring, checking CAPS, Memory, Slee Events),
• Opening Trouble Tickets and raising/ following issues with Level 2 Support

at Telkom - Kenya (from Nov 2006 to March 2007: Huawei client)
• Installation, configuration and commissioning CDMA IN platform
• HP/SUN Cluster Sun Solaris, installation and testing cluster fail over
• Implementation and customization of PPS features, configuring billing, recharge domains and testing nodes connectivity, IVR configuration
• Implement customer request change orders, upgrades, LABS faulty fixes
• Oracle /Informix installation, LUN management, file system configuration
• Informix installation, Oracle 9i PL/SQL programming to manipulate database records and flatfiles
• Installation SCP, SMP, SMAP, DACP, GFEP, USAU, NMS, Operation &Administration, GFEP, WebServer, Report Server, iTellin AAA, SMSC
• Charging data configuration

Botswana Telecommunication -- BTC (July 2006 to October 2006): Huawei Client
• Supporting BTC SMCP IN Platform (SCP, SAU, SMP, SMAP and Informix)
• Implementing Intelligent service (FPH, MCS, PPS, VPN )
• Upgrading platform and services
• Responding and resolving customer callouts and providing required reports
• Tracing SS7, INAP protocol related issues

Malawi Telecommunication Limited- MTL (Oct 2005 to Dec 2005): Huawei Client
• Supporting and deploying IN services (PPS, UAN)
• Routine Maintenance checking (CPU Usage, Disk space, database status, HP-UX & SUN OS checking and backup/restoring, Calltracing of IN Calls
• Oracle database performance checks and liaising with RD department
• IN charging management and configuration charging matrix, Billing processing

Telone -Zimbabwe (Resident Office): Huawei Client
• Supporting IN Platform, Final Acceptance Test VAS services and commissioning
• Deploying Informix, installing SCP, SMP and interconnection configuration
• HP-UX & SUN OS quality checking, upgrades, SQL data manipulations
• Handling and pro-activeness in addressing customer callouts needs
• Completing assigned tasks in time to meet customer SLA, AAA and SMS

Team contracted to develop Customer billing System in partnership with Solution
• Oracle forms 6i and Reports to capture client (Electricity meter details)
• PL/SQL packages, triggers, functions programming for customer information and cycling modules (billing, deposits, routes cycles)
• ETL programs using SQL LOADER and SQL PLUS from AS400
• Configuration of Terminal Service/Client, Network connectivity Testing, TCP/IP
• SQL and PL/SQL scripts to install, create and drop Testing DB objects including: tables, views, primary keys, indexes, constraints, packages, sequences, grants and synonyms
• Technical Support after implementation, User Training approximately 120 Users
• Documented business rules, functional and technical designs, test cases, and user guides


Team contracted to develop Asset Management System (Stocks) with Talon consultants
• Migrating VBA into VB, coding SQL Server functions, stored procedures
• Migrating Access (Back/Front End) to SQL Server 2000 Backend and VB forms
• DLL function for user authentications
• System, module flow documentation and technical guides
• SQL server 2000 database object creation (constraints, relationships and indexes)
Assigned to support Total Insurance, Premium System
• Customize Reports and Query (Progress 4GL)
• Progress Database Administration on Linux platform
• Feasibility study to interface Pastel and Premium reports
• TCP/IP and device configurations, anti-virus installations
• Attending Operational, Technical and management meetings