Vihari Nagella
Senior Consultant
Waterloo,ON
Summary
Dynamic IT professional with over 12 years of experience specializing in SAP Basis, seeking to advance into an SAP Solution Architect role. Certified in SAP HANA and AWS with comprehensive expertise in designing SAP system landscapes, defining migration strategies, and executing large-scale cloud migrations including SAP applications and HANA database migrations. Proficient in upgrades and OS/DB migrations (On-premise/Azure/AWS).
Deeply knowledgeable in SAP application security, Single Sign-On technologies, infrastructure security, and high availability and disaster recovery strategies. Subject Matter Expert in troubleshooting SAP operational support and performance issues, building strong relationships with peers and clients across diverse geographies, and providing expert consulting support.
Demonstrated ability to manage multiple tasks, collaborate effectively within team environments, and respond adeptly to project and customer needs in dynamic, fast-paced settings.
Overview
13
13
years of professional experience
6
6
years of post-secondary education
Work History
Senior Consultant
Infosys Limited
2014.12 - Current
- Over 9 years of experience in Infosys executing SAP implementations, upgrades, and migrations across diverse projects and clients in India, Europe, Canada, and the UK.
- Currently leading a DevOps model Basis operations team for a major hardware manufacturer, managing multiple S/4HANA and ERP landscapes, SAP BTP landscape, and various SAP components.
- Successfully executed a two-phase migration of the entire SAP footprint from on-premise to Azure for an American retail company, achieving the transition with minimal downtime.
- Successfully designed the strategy and executed the migration of the SAP footprint from an older Windows/SQL environment to the latest version for a UK based utilities company, ensuring seamless system updates and enhanced performance.
- Successfully led large-scale SAP HANA database migrations, increasing capacity incrementally from 9 TB to 32 TB over three years.
- Executed a customized as-is migration of a 43 TB GTS application from an on-premise Oracle environment to AWS, utilizing a strategic combination of Distribution Monitor and SWPM tools to ensure a seamless transition.
- Directed the upgrade of S/4HANA systems annually from 2020 to the latest version in 2023, using Zero Downtime Option (ZDO) in collaboration with SAP.
- Implemented a BRIM S/4HANA landscape including Convergent Charging and Convergent Mediation, integrating S/4HANA with SAC and BTP.
- Designed and executed an end-to-end Single Sign-On (SSO) solution for S/4HANA using CloudFlare and Okta IDP for OIDC-based SSO integration.
- Developed SLT scenarios for efficient data provisioning between SAP and non-SAP applications, meeting specific customer needs.
- Implemented an S/4HANA Side-Car solution using Smart Data Integration (SDI) for real-time response requirements in partner-facing applications.
- Designed and implemented robust high availability and disaster recovery solutions for business-critical S/4HANA landscapes.
- Served as the technical lead for an SAP GTS cloud migration project, transitioning a large database from an on-premise data center to AWS, including comprehensive architecture and migration strategy design.
- Executed the migration and scaling of an S4HANA database within AWS from a 3 TB VM to a 12 TB bare metal machine, minimizing downtime.
- Upgraded S4HANA from version 1709 FPS00 to 1909 FPS02, incorporating embedded Fiori activation for enhanced user experience.
- Conducted SAP HANA migrations and upgrades across various landscapes, including SAP PO, ensuring system efficiency and up-to-date technology.
- Managed upgrades and migrations for SAP ECC, BW, and EP across multiple platform versions, ensuring seamless transition and system optimization.
- Implemented and integrated various SAP solutions, including SAP PO, SAP Cloud Platform, and SAP Mobile Services, enhancing system capabilities and user engagement.
- Configured CTS+ for efficient object and transport management of SAP PO & BPM applications, and set up new pre-production environments for Platinum SAP applications.
- Documented all project phases, maintained comprehensive knowledge artifacts, and conducted detailed knowledge transfer sessions to ensure continuity and support readiness.
- As part of the core Level 3 team, supported global BASIS operations and application maintenance for over 250 SAP systems across five regions.
- Developed and implemented system refresh scripts that reduced manual effort by 50%, and created an OCC monitoring dashboard using SAP Wily Introscope for critical SAP ECC applications.
Systems Engineer
Future Focus Infotech Private Limited
2014.02 - 2014.11
- Led Oracle 11g upgrades, Support Package & Patch Bundles, kernel upgrades, add-on installations, system refreshes, and Service Pack Stack upgrades as key initiatives in technical release cycles.
- Conducted comprehensive production health checks for all systems, managed OSS connections, resolved file system issues, analyzed dumps, and administered background jobs to ensure optimal system performance.
- Performed weekly analyses of Early Watch Reports from SAP Solution Manager, implementing strategic recommendations to enhance system efficiency across landscape.
- Managed weekly archiving of SAP SRM documents including purchase orders, shopping carts, and work items, ensuring compliance and data integrity.
- Served as Single Point of Contact (SPOC) for all SOX compliance activities related to Ericsson SRM application, overseeing and ensuring adherence to regulatory standards.
- Responsible for OCC system monitoring across Ericsson landscape, promptly resolving issues in alignment with incident management protocols.
- Spearheaded a Proof of Concept (PoC) for migrating SRM application from Oracle to SAP HANA, demonstrating feasibility and outlining potential efficiency improvements.
Systems Engineer
Tata Consultancy Services Limited
2011.07 - 2013.10
- Expertly managed ABAP and Java start/stop processes, resolving troubleshooting issues efficiently.
- Configured ABAP and JAVA profile parameters, including setting up AS JAVA using config tool and Visual Admin, enhancing system functionality.
- Implemented SSL configurations for enhanced security in JAVA applications.
- Established and maintained Remote Function Call (RFC) connections and administered background jobs to optimize operational workflows.
- Conducted ADS configuration and troubleshooting, ensuring robust document service capabilities.
- Performed comprehensive SAP client administration including client copy, deletion, and system performance health checks.
- Managed language installations and supplementation, ensuring multi-language support across SAP environments.
- Implemented and managed SAP licensing, and maintained remote connections to SAP Support.
- Configured and maintained printer settings in AS ABAP, facilitating smooth peripheral integration.
- Managed transport imports using Transport Management System (TMS) to ensure stable system updates.
- Executed installations of SAP NetWeaver 7.30 on Oracle databases under Windows platforms, including post-installation steps like license applications, operation mode configurations, and VM parameter settings.
- Imported support packages using SPAM for SAP ABAP stacks to keep systems up-to-date.
- Installed and updated essential components such as IGS, SAP Kernel, TP, and R3trans, enhancing system reliability and performance.
- Installed and upgraded SMD Agent, establishing connections with central System Landscape Directory (SLD) for streamlined system management.
- Implemented SAP HANA 1.0 SP5/SP6 installations using both unified and non-unified installers, and managed HANA Revision and SP upgrades using HANA Lifecycle Manager (HLM).
- Installed and upgraded HANA Client and Studio software on Linux and Windows client machines, ensuring tools were up-to-date.
- Conducted performance monitoring and user management in SAP HANA Studio, including user, role, and privilege assignments.
- Oversaw HANA database backup and recovery processes, safeguarding data integrity and availability.
Education
Bachelor of Engineering - Electronics And Communications Engineering
GITAM College Of Engineering (Andhra University)
Visakhapatnam 2007.07 - 2011.04
Intermediate Education - Mathematics, Physics And Chemistry
Narayana Educational Academy
Hyderabad 2005.06 - 2007.04
Skills
SAP Cloud Migrations
undefinedTimeline
Senior Consultant
Infosys Limited
2014.12 - Current
Systems Engineer
Future Focus Infotech Private Limited
2014.02 - 2014.11
Systems Engineer
Tata Consultancy Services Limited
2011.07 - 2013.10
Bachelor of Engineering - Electronics And Communications Engineering
GITAM College Of Engineering (Andhra University)
2007.07 - 2011.04
Intermediate Education - Mathematics, Physics And Chemistry
Narayana Educational Academy
2005.06 - 2007.04
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