PROFESSIONAL SUMMARY:

• Over 7+ years of experience in Information Technology with a strong back ground in Analyzing, Designing, Developing, Testing, and Implementing of Data Warehouse development in various domains such as Financial, Sales, Insurance, Telecom and Wireless.
• Over 7+years of experience in dealing with SQL and PL/SQL.
• Over 6+ years of Data Warehousing experience using Informatica Power center 9.x/8.x/7.x/6.x, Informatica Power Mart 7.x/6.x, Power Connect, Power Exchange, Power Analyzer.
• Expertise in Database development skills using Oracle 11g/10g/9i/8i, SQL, PL/SQL stored procedures, Functions, Packages, Triggers, Cursors, Programming and TOAD.
• Experienced in Installation, Configuration, and Administration of Informatica Power Center/Power Mart Client/Server.
• Experienced in complete life cycle Implementation of data warehouse.
• Strong Knowledge in Relational Database Concepts, Entity Relation Diagrams, Normalization and De normalization Concepts.
• Expertise in building Enterprise Data Warehouses (EDW), Operational Data Store (ODS), Data Marts, and Decision Support Systems (DSS) using Data modeling tool ERWIN and Dimensional modeling techniques (Kimball and Inmon), Star and Snowflake schema addressing Slowly Changing Dimensions (SCDs).
• Extensively worked on various Data warehouse projects using Informatica Client Tools - Source Analyzer, Transformation Developer, Workflow Manager, Workflow Monitor, Server Manager, Mapping Designer, Mapplet Designer and Warehouse Designer.
• Expert knowledge in Trouble shooting and performance tuning at various levels such as source, mappings, target and sessions.
• Experience in Administration activities like Creating and Managing Repositories, Users, User Groups, Folders, Working with administrator functions of Repository Manager.
• Experience in the concepts of building Fact Tables, Dimensional Tables, handling Slowly Changing Dimensions and Surrogate Keys.
• Expertise in designing and Developing complex Mappings using Informatica Power Center Transformations - Lookup, Filter, Expression, Router, Joiner, Update Strategy, Aggregator, Stored Procedure, Sorter, Sequence Generator and Slowly Changing Dimensions.
• Working experience in using Informatica Workflow Manager to create Sessions, Batches and schedule workflows and Worklets, Developing complex Mapplets, Worklets, Re-usable Tasks, Re-usable Mappings, Define Workflows &Tasks, Monitoring Sessions, Export & Import Mappings & Workflows, Backup & Recovery.
• Expertise in doing Unit Testing, Integration Testing, System Testing and Data Validation for Developed Informatica Mappings.
• Data loading using UNIX Shell scripts, SQL*Loader.
• Experience in dealing with various databases like Oracle 11x/10g/9i/8x/7x, SQL Server 2005/2003/2000, Teradata, DB2, MSSQL, Excel sheets, Flat Files, Sybase and XML files.
• Well Experienced in doing Error Handling and Troubleshooting using various log files.
• Good exposure to development, testing, debugging, implementation, documentation and production support.
• Expertise in developing reporting applications using Cognos 8.x/6.x Components like Framework Manager, Report Studio, Query Studio, Analysis Studio, and Data Manager.
• Expertise in developing web service applications using .NET and related technologies.
• Experience in handling initial and incremental loads in target database using mapping variables.
• Developed effective working relationships with client team to understand support requirements, develop tactical and strategic plans to implement technology solutions, and effectively manage client expectation.
• Excellent written, communication skills and possessed analytic problem skills in evaluating business and technical processes and issues, develops and implements system enhancements to facilitate overall operations.

TECHNICAL SKILLS:

Data Warehousing: Informatica Power Center 9.1/8.6/8.1/7.1/6.2/5.1, Informatica Power Mart 7.x/6.x, Informatica Power Exchange 8.x/7.x, Repository Admin console, Repository Manager, Designer, Workflow Manager, and Workflow Monitor.

Data Modeling: Ralph-Kimball Methodology, Bill-Inmon Methodology, Star schema, Snowflake schema, Dimensional data modeling, Snowflake modelingFact Tables, Dimension Tables.

Databases/Files: Oracle 11g/10g/9i/8i, SQL Server 2008/2005, Teradata V2R6, DB2,Sales Force.com,Sybase,Web services,XML and Flat files.

Oracle Utilities: Oracle SQL Developer, SQL * Plus.

Operating Systems: Windows 7/vista/NT/2000/XP, MS-Dos, UNIX/ Linux.

Reporting Tools: Informatica Power Analyzer, Cognos 8.x/6.x, Business Objects XI R3 and OBIEE.

Modeling Tools: Erwin 4.1/4.0, TOAD 9.x/8.x/7.x, SQL Loader 11g/10g, ER-Studio.

Scheduling Tools: Tidal, Autosys, Control-M and Maestro.

Office Tools: MS PowerPoint, MS Word, MS Excel.

Programming: SQL, PL/SQL, T-SQL, C, C++, C# (.NET), HTML, ASP.NET.

Scripting: UNIX Shell Scripting, Java-Scripting, Korn Shell Scripting, Perl Scripting.

PROFESSIONAL EXPERIENCE:

Confidential, Madison, WI

Sr.Informatica Developer

Responsibilities:

• Responsible for Requirement Gathering Analysis and End user Meetings
• Responsible for converting Functional Requirements into Technical Specifications
• Extracted data from various heterogeneous sources like Oracle, SQL Server, Sybase, MS Access, and Flat Files.
• Worked on Power Center Tools like Designer, Workflow Manager, Workflow Monitor, and Repository Manager
• Worked on Designer Tools like Source Analyzer, Warehouse Designer, Transformation Developer, Mapplet Designer, and Mapping Designer
• Extensively used Source Qualifier Transformation, and used most of its features like filter, sorter, and SQL Override.
• Responsible for best practices like naming conventions, Performance tuning, and Error Handling
• Responsible for Performance Tuning at the Source level, Target level, Mapping Level and Session Level
• Used Power Exchange to extract data from the ERP systems.
• Solid Expertise in using both Connected and Un connected Lookup transformations
• Extensively worked with various lookup caches like Static Cache, Dynamic Cache and Persistent Cache
• Extensively worked with joiner functions like normal join, full outer join, master outer join, and detail outer join in the joiner transformation
• Responsible for analyzing, designing and developing ETL strategies and processes, writing ETL specifications for developer, ETL and Informatica development, administration and mentoring.
• Work closely with various levels of individuals to coordinate and prioritize multiple projects. Estimate, schedule and track ETL projects throughout SDLC
• Teradata views have been developed against the Departmental database and claims engine database to get the required data.
• Developed application views in Teradata and using expression and router implemented the Change Data Capture (CDC) process
• Coordinating with user to gather the new requirements and working with existing issues.
• Involved in business analysis and technical design sessions with business and technical staff to develop requirements document, and ETL specifications
• Experience with high volume datasets from various sources like Oracle, Text Files, and Netezza Relational Tables and xml targets
• Responsible for implementing Incremental Loading mappings using Mapping Variables and Parameter Files
• Worked with Informatica and other consultants to develop IDQ plans to identify possible data issues.
• Applied business rules using Informatica Data Quality (IDQ) tool to cleanse data.
• Integrated Informatica Data Quality with Informatica Power Center.
• Installed IDQ on a informatica power center server machine.
• Responsible for determining the bottlenecks and fixing the bottlenecks with performance tuning
• Worked with Session Logs, and Workflow Logs for Error handling and Troubleshooting in DEV environment
• Implemented various loads like Daily Loads, Weekly Loads, and Quarterly Loads using Incremental Loading Strategy
• Responsible for Unit Testing and Integration testing of mappings and workflows
• Responsible for month-end data consistency checks and fixes using shell scripts and stored procedures. Also responsible for tuning stored procedures
• Unit and Integration Testing of Informatica source and Target Data.
• Created and Documented ETL Test Plans, Test Cases, Test Scripts, Expected Results, Assumptions and Validations.
• Created documents for data flow and ETL process using Informatica mappings to support the project once it implemented in production.

Environment: Informatica Power Center 9.5, Informatica Power Exchange, Data Explorer, Data Quality, PL/SQL, Oracle 10g, SQL Server 2008 R2, Sybase, Cobol, Teradata V2R12/V2R6, Flat Files, UNIX Shell Scripting, CA Autosys 11.3

Confidential, Richmond, VA

Sr.Informatica Developer

Responsibilities:

• Extensively worked with the data modelers to implement logical and physical data modeling to create an enterprise level data warehousing.
• Extensively worked on creating Facts and Dimensions tables
• Designed and Developed Oracle PL/SQL Procedures and UNIX Shell Scripts for Data Import/Export and Data Conversions.
• Created and Modified T-SQL stored procedures for data retrieval from MS SQL SERVER database.
• Worked with pre and post sessions, and extracted data from Transaction System into Staging Area.
• Extensively used Informatica Power Center 9.1 to extract data from various sources and load in to staging database.
• Extensively worked with Informatica Tools - Source Analyzer, Warehouse Designer, Transformation developer, Mapplet Designer, Mapping Designer, Repository manager, Workflow Manager, Workflow Monitor, Repository server and Informatica server to load data from flat files, legacy data.
• Extensively used transformations such as Source Qualifier, Aggregator, Expression, Lookup, Router, Filter, Update Strategy, Joiner, Transaction Control and Stored Procedure.
• Designed the mappings between sources (external files and databases) to operational staging targets.
• Involved in data cleansing, mapping transformations and loading activities.
• Developed Informatica mappings and Mapplets and also tuned them for Optimum performance, Dependencies and Batch Design.
• Implemented Slowly Changing Dimension methodology for Historical data.
• Wrote BTEQ Scripts for extracting data.
• Establish Loading process using MLOAD, FLOAD, and BTEQ.
• Exporting Data using BTEQ and Fast Export.
• Generated reports using Teradata BTEQ.
• Fine-tuning of PL/SQL Stored Procedures.
• Designing mapping templates to specify high level approach.
• Created Data Breakpoints and Error Breakpoints for debugging the mappings using Debugger Wizard.
• Provided production support for Business Users and documented problems and solutions for running the work flow.
• Extensively worked on unit testing and implemented on transformations, mappings.
• Involved in production support and stabilizations.
• Worked on Migration of Data warehouse in between different versions.
• Coordinated between Development, QA and production migration teams.
• Extensively involved in documentation of the project.
• Reports were generated using Business Objects for analysis.

Environment: Informatica Power Center 9.1, Teradata V2R5/V2R6, Oracle 11g, PL/SQL, Hyperion, SQL SERVER 2005, UNIX Shell scripting, Business Objects XI R3, ESP Schedule, TOAD, SQL Assistant, Win 7.

Confidential, Milpitas, CA

ETL Developer

Responsibilities:

• Involved in the requirement analysis, database design and modeling Techniques.
• Preparation of strategy for Data Conversion as per the business rules.
• Collection of data source information from all the legacy systems and existing data stores.
• Configured and Installed Informatica power center 8.6 on Oracle database in Windows 2008 Environment.
• Created repositories and folders as per the client requirement.
• Developed complex mappings using multiple sources and targets in different databases, flat files.
• Created different transformations using Informatica power center 8.6 for loading the data into targets using various transformations like Source Qualifier, Java Transformation, SQL transformation, Joiner transformation, Update Strategy, Lookup transformation, Rank Transformations, Expressions, Aggregator, and Sequence Generator.
• New attributes/columns were introduced in the dimension tables by slowly changing dimensions.
• Used Workflow Manager to create Worklets and workflows and Workflow Monitor to monitor the workflows.
• Used Workflow Manager to create connections, sessions, tasks, workflows and created Event Wait, Event Raise, Timer and Control Events in a single master workflow according to the business requirements.
• Applied performance tuning on targets, sources, mappings and sessions to improve system performance.
• Writing Oracle Stored Procedures, SQL scripts and calling them by using Perl shell and Korn shell scripts at pre and post session.
• Developed PL/SQL, T-SQL stored procedures for pre and post session commands and used indicator files to run tasks in workflows.
• Tuning Informatica Mappings and Sessions for optimum performance.
• Used shortcuts to reuse objects without creating multiple objects in the repository and inherit changes made to the source automatically.
• Well Experienced in doing Error Handling and Troubleshooting using various log files.
• Created Breakpoints for debugging the mappings using Debugger.
• Extensive use of Persistent cache to reduce session processing time.
• Created partitions for concurrent loading and processing of data.
• Implemented XML and UML web services using C #.NET and ASP.NET.
• Deployment of Informatica jobs into testing, Validation and production environments.
• Preparing deployment documents, user guides, coding standards, and other technical documents.
• Prepared ETL mapping Documents for every mapping and Data Migration document for smooth transfer of project from development to testing environment and then to production environment.
• Involved in the creation of new users and controlling and administering the access privileges to Informatica Power Analyzer.
• Reports were generated using power analyzer for analysis.

Environment: Informatica Power center 8.6.1, SAP R/3, oracle 11g, SQL server 05, Toad for oracle 8.1, ER-studio, Maestro, DB2, Sybase, XML, Flat Files, Windows 7, Linux, Power Analyzer.

Confidential

Data Warehouse Developer

Responsibilities:

• Actively involved in gathering requirements and acquiring application knowledge from Business Managers & Application Owners.
• Prepared the High-level Design document to provide an overview of the technical design specification system required for Application Enhancements.
• Involved in designing the process flow for extracting the data across various systems interacting.
• Developed ETL routines using Informatica Power Center and created mappings involving transformations like Lookup, Aggregator, Ranking, Expressions, Mapplets, connected and unconnected stored procedures, SQL overrides usage in Lookups and source filter usage in Source qualifiers and data flow management into multiple targets using Routers.
• Implemented dimension model (logical and physical data modeling) in the existing architecture using Erwin.
• Designed data model structure and E-R modeling with all the related entities and relationship with each entity based on the rules provided by the business manager using Erwin.
• Used workflow manager for session management, database connection management and scheduled the jobs to run in the batch process.
• Developed Slowly Changing Dimensions for Type 2 SCD.
• Troubleshoot the issues by checking sessions and workflow logs.
• Involved in analyzing the bugs, performance of PL/SQL Queries and provided solutions to improve the same.
• Written and used UNIX shell scripts extensively for scheduling and pre/post session management
• Involved in the performance tuning process by identifying and optimizing source, target, mapping and session bottlenecks.
• Involved in Unit testing, System testing to check whether the data loads into target are accurate, which was extracted from different source systems according to the user requirements.
• Prepared the Standard Operating Procedure (Knowledge Transfer) document, which provides necessary information, required for the Maintenance and Operation of the application.
• Provided data loading, monitoring, system support and general trouble shooting necessary for all the workflows involved in the application during its production support phase.
• Actively participated in data base testing like checking the constraints, correctness of the data, stored procedures, field size validation, etc.

Environment: Informatica Power Center 8.6.1, Oracle 11g, PL/SQL, SQL Server 2005, T-SQL, SQL*Loader, Erwin 4.0, SQL Loader 11g, Win 2008, Perl & Korn scripts, SAP R3, Flat files, SAS Data, Toad, Solaris 10, Autosys, ODBC, Power Analyzer.

Confidential

Programmer Analyst

Responsibilities:

• Interacted with Business Analysts, Source to Target Mapping and E-R Diagramming.
• Developed the ETL process from the source system into the Oracle Dimension and Fact tables using POWERCENTER 1.7. Developed stored procedures, functions and database triggers in the backend.
• Automated the report generation process from Oracle using Essbase 5.0 through VBA coding in EXCEL.
• Effected Modifications to the reports on user-request and comprehensively tested the reports.
• Participated in Data Modeling in Designer 2000, Source System Analysis and STAR Schema design.
• Created very complex SQL and used dynamic views and correlated queries of the highest quality.
• Developed stored procedures, functions and database triggers in the backend.
• Tuned the SQL using optimizer hints and EXPLAIN PLAN.

Environment: Informatica Power Center 5.1, Informatica Power Connect, Cognos, Oracle 7.3, MS SQL Server 2000, HTML, XML, SQL Plus, PL/SQL, SQL, and Windows 2000.