The document provides a summary of a candidate's professional experience including 4+ years of experience developing data warehouses using Informatica. Specific experiences include ETL development, data modeling, performance tuning, and testing. Details are provided on 4 projects involving healthcare, banking, and retail clients. Responsibilities included developing mappings, transformations, documentation, testing, and support. Technologies used include Informatica, Oracle, SQL, and Unix.

1. M Gourishankar Email: mgouri.info@gmail.com
Mobile: +91-8008444870
Professional Summary:
• Having 4+ Years of Experience in Data warehousing development this includes Development /
Enhancement.
• Extensive experience in Software Development Life Cycle (SDLC) including the requirement
gathering, analysis, design, development, testing, deployment and ongoing support for
applications.
• Currently working in Health Insurance domain for CIGNA and also worked for Banking
Domain.
• Having Valid B1 VISA.
• Extensive experience in the Extraction, Transformation and Loading of data from multiple
sources into Data Warehouse using various versions of Informatica Power Center.
• Experience in dealing with various Data sources like Oracle, DB2, Flat files.
• Well conversant with Data Warehousing & Data Modeling methodologies.
• Experience in implementing the business rules by creating transformations (Source Qualifier,
Expression, Aggregate, Lookups, Joiner, Filter, Sequence Generator, Router, Rank and Update
Strategy) and developing Mappings.
• Extensive experience at Performance tuning in Informatica.
• Creating re-usable transformations that Expression and Connected Lookup transformations.
• Involved in unit testing.
• Created the Application Design Documents based on the Functional Requirement Documents.
• Good team player with excellent Interpersonal and Communication skills.
Technical Skills:
Data Warehousing Tool : INFORMATICA 9.5.1, 9.1, 8.6.
Analysis Tool : IBM Information Analyzer & Metadata Workbench.
RDBMS : ORACLE 11G.
Languages : SQL, PL/SQL, UNIX Shell Scripting.
Operating System : UNIX, Windows 7/XP.
Scheduling Tools : ESP
Certificates : PAHM
Employment Profile:
• Working as a Software Engineer in CGI from Oct 2012 to Till Date
• Worked as a Software Engineer in Winhire Technologies from Jun 2012 to Aug 2012.
Achievements:
• CARONA TEAM Award for delivery of RDS project ETL development during 2014 Q3
in CGI.
Education Details:
• Master of Technology in CSE from Jawaharlal Nehru Technology University Hyderabad.
1

2. Project Information :
Project Title : CLAIMS-RDS,
Client : CIGNA
Team Size : 6
Duration : Oct 2014 – Till Date.
Role : Software Engineer.
Environment : Informatica Power Center 9.1, Oracle.
Description:
The Claim RDS a single point of source for Cigna medical claims and intent to provide data
consistently to various consumers such as Cigna Corporate Warehouse (CCW) is a new enterprise
data warehouse platform with a vision to provide clean, reliable, timely data for services, reporting
and analytics to its consumers. This application comprises of set of technologies primarily databases
and ETL tool.
The Claim RDS is a new enterprise data component with a vision to store and distribute the
data from original sources to internal consumers in a timely, efficient manner with fewer impacts to
the original sources, The strategic medical claim data that is the focus of this project will be provided
by the Benefit Configuration & Adjudication (BCA) ASG gathered from its medical claim engines
such as PMHS, PCLM ,FCTS, BCA will collect and house the gathered claim data in a Read-only
Data Store (RDS).
The Claim RDS Process extracts the delta/history loads from source (PMHS,
PCLM, and FCTS) databases and process the data in a multi layered approach before the data gets
loaded into final RDS Masters. The application utilizes the ETL Informatica tool to extract, transform
and load delta/historical records. The RDS ETL process follows standard “Pull” approach, and the
data will be processed in batch manner with a three layered approach as described below.
Roles & Responsibilities:
• Mainly involved in ETL developing. That is in the creation of ETL Mappings and
transformations to reflect business rules using Informatica Power Centre to move data
from multiple sources into target area, source systems are mainly delimited flat files, and
relational tables.
• Developed Quick fix mappings in Informatica to load the data from various sources into
the Data Warehouse, using different transformations like Joiner, Aggregator, Update
Strategy, Rank, Router, Lookup, Sequence Generator, Filter, Sorter, Source Qualifier to
resolve the issues raised during the production run.
• Worked on Informatica –Source Analyzer, Warehouse Designer, Mapping Designer,
Transformations and used most of the transformations.
• Tuned sources, targets, mappings and sessions to improve the performance.
• Used Shortcuts to reuse objects across folders to reduce the Rework.
• Worked on Job failure as well as Data Issues and resolve the issues within the SLA.
• Monitoring the workflows and on failure fixing the errors and rescheduling the job.
• Documentation of each process ( Preparing Low level Design document, Technical Spec,
Test Case document, Process document for all existing workflows)
• Created the Application Design Documents based on the Functional Requirement
Document.
• Performed Unit Testing.
2

3. Project # 2:
Project Title : OIM Delta Process,
Client : PNC Bank.
Team Size : 4
Duration : Apr 2014 – Oct 2014.
Role : Software Engineer.
Environment : Informatica 9.5, SQL, Windows Server, Flat File.
Description:
Oracle Identity Management enables organizations to effectively manage the end-to-end
lifecycle of user identities across all enterprise resources, both within and beyond the firewall and into
the cloud. The Oracle Identity Management platform delivers scalable solutions for identity
governance, access management and directory services. This modern platform helps organizations
strengthen security, simplify compliance and capture business opportunities around mobile and social
access.
Roles & Responsibilities:
• Created ETL Mappings and transformations to reflect business rules using Informatica
Power Centre to move data from multiple sources into target area, source systems are
mainly delimited flat files, and relational tables.
• Created Informatica Mappings to load data using transformations like Source Qualifier,
Sorter, Aggregator, Expression, Joiner, Connected and Unconnected lookups, Filters and
Update Strategy.
• Tuned sources, targets, mappings and sessions to improve the performance.
• Used debugger to test the data flow and fix the mappings.
• Created Data Dependency load Document for all the workflows and created Batch Script
to automate the workflows as per Data Dependency load.
• Involved in UNIT Testing.
• Prepared Low-level Design documents for the entire project, which included the
workflow for entire data, Target loading.
• Prepared the TDDD for the various reports.
Project # 3:
Project Title : MA-HIX-IES,
Client : US Federal (Massachusetts State)
Team Size : 4
Duration : Oct 2012 – Apr 2014.
Role : Software Engineer.
Environment : Informatica Power Center 9.5.1, Oracle, Rhapsody.
Description:
This project is a health insurance exchange project for state of MA, USA. At the frontend user
would get a provision to buy a normal/subsidies health insurance for themselves and their family
members. Informatica is used to get data from various legacy systems to database and from database
to data mart based upon various business rules.
Roles & Responsibilities:
• Mainly involved in ETL developing.
• Involved in development of Stage & Dimension tables, mappings using
Connected/Unconnected LKP's, EXP, UPD, SEQUENCE GENERATOR, FILTER
Transformation.
3

4. • Worked on Informatica –Source Analyzer, Warehouse Designer, Mapping Designer,
Transformations and used most of the transformations.
• Using Transformations to clean the data from staging area as per the data warehouse
requirements.
• Used Shortcuts to reuse objects across folders to reduce the Rework.
• Performed Unit Testing.
• Documenting, and developing the INFORMATICA mappings.
• Prepared Low-level Design documents for the entire project, which included the
workflow for entire data, Target loading.
• Prepared the TDDD for the various reports.
Project # 4:
Project Title : EDW (Enterprise Data Warehouse)
Client : Staples, USA.
Team Size : 8
Duration : Jun 2012 – Aug 2012.
Role : ETL Developer.
Environment : Informatica Power Center 8.6, Oracle, UNIX.
Description:
Staples Inc. is a global retailer of office furniture,
personal computers, printers and consumer electronics. They
believe in selling recycled, eco-friendly products. This
Project builds Corporate Data to suit requirements of Data
Ware House for providing sales analysis and purchase analysis
for taking business decisions by identifying key financial
metrics like amount sold, quantity sold and revenue. This
project involves creation of Enterprise Data warehouse for
Staples, Inc. All the data from different Source systems is
moved into staging area and then loaded into warehouse system
on daily basis.
Roles & Responsibilities:
• Mainly involved in ETL developing.
• Involved in development of Stage & Dimension tables, mappings using
Connected/Unconnected LKP's, EXP, UPD, FILTER, AGG, JOINER Transformation.
• Worked on Informatica –Source Analyzer, Warehouse Designer, Mapping & Mapplet
Designer, Transformations and used most of the transformations.
• Using Transformations to clean the data from staging area as per the data warehouse
requirements.
• Used Shortcuts to reuse objects across folders without creating multiple objects.
• Documenting, and developing the INFORMATICA mappings.
• Prepared Low-level Design documents for the entire project, which included the
workflow for entire data, Target loading.
• Preparing Minutes of Meeting with Client.
4