Ratna Rao Yamani is an IT professional with 9.5 years of experience, primarily in data warehousing technologies and Informatica tools. Notable projects include data management for Liberty Mutual and developing a central database for Morgan Stanley, where he played key roles in ETL architecture, data modeling, and team mentorship. His expertise includes performance tuning, SQL, PL/SQL, and various database technologies.

1. Resume Of Ratna Rao Yamani
ratnarao_yamanidwh2016@yahoo.com +91 – 9542366354
Competent professional offering around 9.5 years of experience in IT and 7 years of experience in data-
warehousing technologies of Informatica Power Center 9.1 and participated in all phases of SDLC. I am
having good Exposure on Informatica MDM (Landing,Stageing (Raw & Reject tables, Base Object, Match,
AutoMerge,ManualMerge Data steward and Golden Record).and Informatica Data Directory).
Summary:
 Served as the lead troubleshooter to diagnose technology and functional related issues
 Interacted with Business Analysts to understand the Business Requirements and developed the
Technical Design docs.
 Coordinated between offshore team members and onsite business analysts.
 Created Logical and Physical Models by using Erwin tool.
 Proficient in the development of ETL Code using Informatica Power Center and Informatica Power
Exchange.
 Extensively working knowledge for CDC and data profiling.
 Excellent knowledge in Informatica IDQ.
 Exposure with Informatica MDM Hub configurations.
 Proficient in performance tuning at Mapping and Session Level and query level.
 Design the testing strategy to ensure the functionality and performance.
 Developed test approaches, test plan and test cases.
 Sound knowledge of Oracle database concepts and Proficient in writing functions, Procedures.
 Written functional and technical test cases and executed the same.
 Excellent problem solving skills with a strong technical background and result oriented team player with
excellent communication and interpersonal skills.
Education:
Master of Computer Applications (M.C.A) from Periyar University, INDIA.
Certifications:
I have cleared the Informatica Mapping Designer and Administration papers.
Technical Skills:
Data Warehousing Informatica Power Center 9.1/8.1/6.2/5.1.1/5.0 Power Mart 5.1.1/5.0/4.7 (Repository Admin
Console, Repository Manager, Designer, Workflow Manger, Workflow Monitor), Power
Connect. Power Exchange and IDQ
Databases DB2 10.1/9.7/9.5/9.0, Oracle 10g/9i/8i/8.0/7.x, MS-Access 2000/97/7.0.
BI Tools Business Objects 5.x/6.5(Supervisor, Designer, Reporter).
Data Modeling Logical and Physical Modeling using Erwin tool
Programming SQL, PL/SQL
Environment Windows 98/NT/2000/2003/XP, Sun Solaris 2.6/2.7 and MS Dos 6.22.
Project Details: 1
Organization: Trianz IT Solutions
Client: Liberty Mutual
Project Name: LM – Data Management
Duration: June 2014 – Till Date
Liberty Mutual Group is leading insurance provider in US and presence in the Property, Auto and Liability
insurance sectors. This project is to implement all the Commercial Insurance Claims Transformation effort of
Commercial Markets platform to future state solution. The scope of this project is to bring all Liberty

2. Mutual Agency Markets commercial lines of business PAL (Property, Auto and Liability) claims into a single
platform, Commercial Insurance Claim Center.
Responsibilities:
 Involved in gathering Business Requirements and developed the Technical Design documents.
 Prepared Effort estimations for ETL build and Resource plan.
 Extensively working knowledge for CDC and data profiling.
 Mentored team in troubleshooting validation issues, data analysis and make recommendations for
system improvements.
 Reviewing (Code / Document) of all deliverable aspects.
 Worked on Informatica Power Center tools- Designer, Repository Manager, Workflow Manager, and
Workflow Monitor.
 Parsed high-level design specification to simple ETL coding and mapping standards.
 Designed and customized data models for Data warehouse supporting data from multiple sources on
real time
 Involved in building the ETL architecture and Source to Target mapping to load data into Data
warehouse.
 Created mapping documents to outline data flow from sources to targets.
 Extracted the data from the flat files and other RDBMS databases into staging area and populated onto
Data warehouse.
 Maintained stored definitions, transformation rules and targets definitions using Informatica repository
Manager.
 Used various transformations like Filter, Expression, Sequence Generator, Update Strategy, Joiner,
Stored Procedure, and Union to develop robust mappings in the Informatica Designer.
 Developed mapping parameters and variables to support SQL override.
 Created mapplets to use them in different mappings.
 Developed mappings to load into staging tables and then to Dimensions and Facts.
 Used existing ETL standards to develop these mappings.
 Worked on different tasks in Workflows like sessions, events raise, event wait, decision, e-mail,
command, worklets, Assignment, Timer and scheduling of the workflow.
 Created sessions, configured workflows to extract data from various sources, transformed data, and
loading into data warehouse.
 Used Type 1 SCD and Type 2 SCD mappings to update slowly Changing Dimension Tables.
 Extensively used DB2 to load data from flat files to the database tables in Oracle.
 Modified existing mappings for enhancements of new business requirements.
 Used Debugger to test the mappings and fixed the bugs.
 Prepared Effort estimations for ETL build and Resource plan.
 Extensively working knowledge for CDC and data profiling.
 Mentored team in troubleshooting validation issues, data analysis and make recommendations for
system improvements.
 Reviewing (Code / Document) of all deliverable aspects.
 Environment: Informatica Power Center 9.1, Oracle 10g, DB2 10.1, Erwin 9, Windows NT 4.0 and Sun
Solaris.
Project Details: 2
QWEST, Denver, CO
Duration: Sept 2012 to May 2014
Client : Morgan Stanly
Role : Team Lead
Qwest is a large telecommunications carrier. Qwest Communications provides long-distance services and
broadband data, as well as voice and video communications globally. This project includes developing Data
warehouse from different data feeds and other operational data sources. Built a central Database where
data comes from different sources like oracle, SQL server and flat files. Actively involved as an Analyst for
preparing design documents and interacted with the data modelers to understand the data model and
design the ETL logic.
Responsibilities:

3.  Responsible for Business Analysis and Requirements Collection.
 Worked on Informatica Power Center tools- Designer, Repository Manager, Workflow
Manager, and Workflow Monitor.
 Parsed high-level design specification to simple ETL coding and mapping standards.
 Designed and customized data models for Data warehouse supporting data from multiple
sources on real time
 Involved in building the ETL architecture and Source to Target mapping to load data into Data
warehouse.
 Created mapping documents to outline data flow from sources to targets.
 Extracted the data from the flat files and other RDBMS databases into staging area and
populated onto Data warehouse.
 Maintained stored definitions, transformation rules and targets definitions using Informatica
repository Manager.
 Used various transformations like Filter, Expression, Sequence Generator, Update Strategy,
Joiner, Stored Procedure, and Union to develop robust mappings in the Informatica Designer.
 Developed mapping parameters and variables to support SQL override.
 Created mapplets to use them in different mappings.
 Developed mappings to load into staging tables and then to Dimensions and Facts.
 Used existing ETL standards to develop these mappings.
 Worked on different tasks in Workflows like sessions, events raise, event wait, decision, e-
mail, command, worklets, Assignment, Timer and scheduling of the workflow.
 Created sessions, configured workflows to extract data from various sources, transformed
data, and loading into data warehouse.
 Used Type 1 SCD and Type 2 SCD mappings to update slowly Changing Dimension Tables.
 Extensively used DB2 to load data from flat files to the database tables in Oracle.
 Modified existing mappings for enhancements of new business requirements.
 Used Debugger to test the mappings and fixed the bugs.
 Wrote UNIX shell Scripts & PMCMD commands for FTP of files from remote server and
backup of repository and folder.
 Involved in Performance tuning at source, target, mappings, sessions, and system levels.
 Prepared migration document to move the mappings from development to testing and then to
production repositories.
 Environment: Informatica Power Center 8.6.1, Workflow Manager, Workflow Monitor, Oracle
10g/9i, Autosys, DB2, UNIX AIX,
Project Details: 3
Client: Zurich Germany
ZDW (Zurich Data warehouse)
Senior Software Engineer
Feb 2008 – Jan 2012
Prior to ZDW, there were several stand alone products or Data Marts. But then the need aroused to have a
general DW for ZURICH. As of now we have plenty of Data Marts and General Insurance is one of them
which have been recently moved into production. In this Data is loaded on a daily basis into this from various
branches and in turn it provides the data to various Data Marts. As always, the same case is here as well
and we have 4 different environments to work like Development, Testing, Production and special
environment i.e. FIX environment:
 Development - Every developer works in using a particular DEB ID.
 Integration – The testing is done in deeper sense and once it’s complete then only anything is moved to
Production.
 Production – It’s the real environment where every thing that has been worked upon so far in dev and
integration has to work properly.

4.  Fix Environment – This is a special environment where programs are rectified if something fails in the
production. Using this environment we get into a position so that we do not have to follow the complete
cycle again i.e. the Dev  Integration  Prod.
Environment: Informatica Power Center 6.1, DB2 9.7, Flat Files and COBOL Files and UNIX.
Responsibilities:
 Understanding existing business model and customer requirements.
 Created the mappings for the following business transactions based on the sources and targets loaded
in the Informatica.
 Used Source Analyzer and Warehouse Designer to import the source and target database schemas,
and the mapping designer to map source to the target.
 Used Transformation Developer to create the Expression, Filters, lookups and Aggregation
transformations, which are used in mappings. Maintained source definitions, transformation rules and
targets definitions using Informatica repository manager.
Project Details: 4
 Client: Sun Microsystems
 Sales Data Mart
 Software Engineer
 Sep 2005 –Dec 2007
 Mainframes Re-hosting in Super Value, Many legacy application systems residing in Mainframes were
being re-hosted to Windows platform. The project involved Legacy Enhancements as part of
Mainframes re-hosting. The systems would be re-hosted in windows platform using MICROFOCUS
ENTERPRISE SERVER and MICROFOCUS NET EXPRESS. As a part of this program one of the
legacy language MARKV, which access IMS DB, would be re-engineered to
 COBOL-CICS-IMSDB in windows platform using Microfocus.
Responsibilities:
 Understanding and implementing the re-hosting concept
 Understanding the Mark V-IMS program and developing the COBOL-CICS-IMS programs
 Testing and debugging the new application
 Providing support to seniors
Environment: Platform/OS Used: Mainframes/ Z OS/Unix/Windows
Databases Used: IMS DB
Language(s)/Tools/ Packages Used: COBOL, Microfocus COBOL, CICS, SQL/PLSQL,
File-AID, Microfocus Enterprise Server,
Microfocus NetExpress, TSO/ISPF, SPUFI, JCL
Employment History:
Company Name Designation Start date End date
Techno Sphere IT Solutions Team Lead August-2012 Till Date
CSC India Team Lead Sep-2005 Jan- 2012