This document contains a resume for Kumaraswamy N summarizing his experience and skills as an ETL developer. He has over 8 years of experience in ETL development using Informatica and developing data warehouses. Some of his key skills and experiences include designing and developing ETL mappings in Informatica, data modeling, working with various data sources, performance tuning, and implementing slowly changing dimensions. He has worked on multiple projects for clients in various industries extracting data from sources like Oracle, SQL Server, and flat files and loading it into data warehouses and data marts.

1. KUMARASWAMY.N
kumarswamy0911@gmail.com
201-920-9726 Sr. ETL/Informatica Developer
PROFESSIONAL SUMMARY:
 Over all 8 years of work experience in Information Technology as Informatica Developer with
strongbackgroundin ETL Data warehousing experienced using Informatica Power Center9.x/8.x/
7.x.
 I have good experience in Informatica Installation, Migration and Upgrade Process.
 Experience in using Informatica Power Center Transformations such as Source Analyzer,
Transformation Developer, Mapplet Designer, Mapping Designer, Workflow Manager,
Workflow Monitor and Repository Manager.
 Experience in integrationof variousdatasources like SQL Server, Oracle, Flat Files, andXML files.
 Experience in developing XML/XSD/XSLT as a part of Source XML files for Informatica and also
input XML for Web service Call.
 Expertise in designandimplementation of SlowlyChangingDimensions (SCD) type1, type2,type3.
 Experienced in loading data, troubleshooting, Debugging mappings, performance tuning of
Informatica (Sources, Targets, Mappings and Sessions) and fine-tuned transformations to make
them more efficient in terms of session performance.
 Database experience using Oracle 11g/10g/9i, Teradata, MS SQL Server 2008/2005/2000 and MS
Access.
 Experience in UNIX Operating System and Shell scripting.
 Working knowledge of data warehouse techniques and practices, experience including ETL
process, dimensional data modeling (Star Schema, Snow Flake Schema, FACT & Dimension
Tables), OLTP and OLAP.
 Experience in data mart life cycle development, performed ETL procedure to load data from
different sources into Data marts and Data warehouse using Informatica Power Center.
 Used Debugger in Informatica Power Center Designer to check the errors in mapping
 Experience in writing complex SQL queries.
 Experience in working with Oracle, Netezza databases.
 Experience working on Hadoop using Hive database (HUE).
 Experience in integration of data sources like Oracle 11G and Flat Files.
 Created Views in Hive database to load into Hive and Netezza databases.
 Experience in using Informatica Utilities like Pushdown optimization, Partition and implemented
slowly changing dimensions Type1, Type2 methodology for accessing the full history of accounts
and transaction information.
 Excellent skills in fine tuning the ETL mappings in Informatica.
 Extensive experience using databasetoolsuch as SQL *Plus, SQL *Developer, Autosysand TOAD.
 Effective working relationships with client team to understand support requirements, and
effectively manage client expectations.
 Excellent communication, presentation, project management skills, a very good team player and
self-starter with ability to work independently and as part of a team.
EDUCATION:
 Bachelors in Computer Science & Engineering, India.

2. TECHNICAL SKILLS:
ETL Tools
Informatica 9.x/8.x/7.x (Power Center/Power Mart) (Designer, Workflow
Manager, Workflow Monitor, Server Manager, Power Connect)
Data Modeling
Physical Modeling, Logical Modeling, Relational Modeling, Dimensional
Modeling (Star Schema, Snow-Flake, Fact, Dimensions), Entities, Attributes,
Cardinality, ER Diagrams.
Databases
Oracle 11g/10g/9i/8i,Teradata,MS SQL Server 2008/2005/2000, MS Access and
DB2
Languages SQL, PLSQL C,C++,Data Structures, Unix Shell Script, Visual Basic
Web Technologies XML,HTML, Java Script
Tools Toad, SQL* Developer, Autosys,Erwin
Operating Systems Windows Server, NT/2008/2003/XP/Vista/7, UNIX, MS-DOS and Linux
PROFESSIONAL EXPERIENCE:
Client: Wells Fargo, NC Apr 2016 - Till date
Role: Senior ETL Developer
Responsibilities:
 Involved in the design, development and implementation of the Enterprise Data
Warehousing (EDW) process.
 Provided data warehouse expertise including data modeling, Extract, Transform and Load (ETL)
analysis, design and development.
 Hands-on Experience in working with Source Analyzer, Warehouse Designer, Mapping Designer,
Mapplets to extract, transform and load data.
 Created Mapping Parameters, Session parameters, Mapping Variables and Session Variables.
 Involved in extensive performance tuning by determining bottlenecks at various points like
targets, sources, mappings, sessions or system. This led to better session performance.
 Worked with variousActive andPassive transformationslike Source Qualifier, Sorter,Aggregator,
Filter, Union, and Router Transformations, Sequence Generator and Update Strategy
Transformations.
 Handled versioning and dependencies in Informatica.
 Developed schedules to automate the update processes and Informatica sessions and batches.
 Resolving technical and design issues.
 Developed data transformation processes, maintain and update loading processes.
 Developed and implemented the UNIX shell scripts for the start and stop procedures of the
sessions.
 Used UNIX shell scripts to run the batches.
 Developed standards and procedures to support quality development and testing of data
warehouse processes.
Environment: Informatica 9.5.1, Oracle11g, SQL Server 2008, Autosys, Windows Server 2008, UNIX.

3. Client: Bank of America, NC Apr 2015- Mar 2016
Role: Senior ETL Developer
Responsibilities:
 Analyzed the businesssystems, gathered requirementsfrom the users and documentedbusiness
needs for decision supporting data.
 Interpreted logical and physical data models for Business users to determine common data
definitions and establish referential integrity of the system.
 Created the (ER) Entity Relationship diagrams & maintained corresponding documentation for
corporate data dictionary with all attributes, table names and constraints.
 Prepared technical documentation to map source to target.
 Designed, Developed, Deployed and implemented ETL mappings using Informatica
 Migrated Workflows, Mappings, and other repository objects from Development to QA and then
to production.
 Responsible for performance tuning at all levels of the Data warehouse.
 Created Informatica sessions in workflow manager to load the data from staging to Target
database.
 Prepared technical design/specifications for data Extraction, Transformation and Loading.
 Using Aggregator transformation calculated SUM, AVG of monthly sales for different products.
 Created different target schemas for Staging and Data Mart.
 Designed the Mapping Design documents and the Deployment Documents.
 Designed and Developed several mappings to Load the Dimensions and the fact tables using
transformations like XML, Union, Expression, Filter, Aggregator, Lookup and Router etc.
 Worked with Flat files and XML files generation through ETL process
 Generated XML files as target to load into the vendor customized application to generate the
reports.
 Involved in XML and XSLT coding in order to create the Front End screen insert activities
 Implemented Slowly Changing Dimensions Type1, Type 2.
Environment: Informatica 9.5.1, Oracle11g, SQL Server 2008, TOAD, SQL Navigator, Windows Server
2008, UNIX.
Client: Cigna, Hartford, CT Jan 2014 - Mar 2015
Role: ETL Developer
Project Description: The Enterprise Data warehouse(EDW) is system we allthe insurancedatawill be
maintained of the customers. The Cigna is offering different types of Insurance for their customers
like Health, Auto, Property, Rental etc. To maintain all these transactions history a centralized
application is built that’s called EDW.
Responsibilities:
 Gathered user Requirements and designed Source to Target data load specifications based on
business rules.

4.  Used Informatica Power Centre 9.0.1.for extraction, loading and transformation (ETL) of data in
the datamart.
 Designed and developed ETL Mappings to extract data from Flat files and Oracle to load the data
into the target database.
 Developing several complex mappings in Informatica a variety of Power enter transformations,
Mapping Parameters, Mapping Variables, Mapplets & Parameter files in Mapping Designer using
Informatica Power enter.
 Built complex reports using SQL scripts.
 Created complex calculations, various prompts, conditional formatting and conditional blocking
etc., accordingly.
 Created complex mappings to load the data mart and monitored them. The mappings involved
extensive use of Aggregator, Filter, Router, Expression, Joiner, Union, Normaliser and Sequence
generator transformations.
 Ran the workflows on a daily and weekly basis using workflow monitor.
Environment: Informatica 9.0.1, PL/SQL,Framework Manager, Transformer, Teradata ,Oracle 11g,
TOAD, Windows Server 2008, UNIX.
Client: MediMedia, Yardley, PA Jan 2013 - Dec 2013
Role: ETL Developer
MediMedia is a leading multichannel marketing provider of promotional health care-related
campaigns. It delivers a suite of sampling and fulfillment services for the pharmaceutical and
biotechnology industries.Project is to enhance fulfillment maintenance application by authoringnew
reports for tracking fulfillment activity, unit redemption trend analysis and LIT packages.
Responsibilities:
 Participated in all phases of system development life cycle from requirements gathering to
deployment of the finished system into production followed by maintenance and knowledge
transfer tasks.
 Gathered requirements by analyzing source systems and identification of business rules through
regularrequirements gatheringsessionswith business usersand other supportteams for various
OLTP and OLAP systems.
 Used Power Center Designer to design the business process, grain of the data representation,
dimensions and fact tables with measured facts.
 Extensively used Transformationslike lookup, Router,Filter, Joiner, Source qualifier, Aggregator,
Update strategy, Etc.
 Involved in performance tuning of sessions that work with large sets of data by tweaking block
size, data cache size, sequence buffer length and target based commit intervals.
 Developed sessionsandbatches tomove data at specific intervalsandon demandusingworkflow
manager.
 Participated in deployment planning and in deployment of the system to production.
 Facilitated business user smoke testing of the production system by setting up test data.
 Involved in production support duties including monitoring of nightly batches.

5.  Responsiblefor updatingbusinessstakeholdersandOLTP/OLAP application supportteamsabout
the status of various ETL sessions and the impact of failed sessions on data availability.
Environment: Informatica Power Center 9.1. , Oracle10g, SQL*PLUS, TOAD, DB2, UNIX, Windows
Client: ICICI, India Sep 2011 - Dec 2012
Role: Informatica Developer
ICICI Bankis arapidly growingBankingandcredit cardcompany inINDIA. The companywas interested
in developing several Data Marts, Operational Data Store and Enterprise Data Warehouse from the
historical, transactional and financial data for analysis by different business units within the Bank.
Responsibilities:
 Based on the requirements created Functional design documents and Technical design
specification documents for ETL Process.
 Developed mappingsand mappletsusingInformatica Designer to loaddata into ODS from various
transactional source systems.
 Used Informatica Designer to import the sources, targets, create various transformations and
mappings for extracting, transforming and loading operational data into the EDW from ODS.
 Used various transformations such as expression, filter, rank, source qualifier, joiner, aggregator
and Normalizer in the mappings and applied surrogate keys on target table.
 Used the Informatica Server Manager to register and monitor the server, create and run the
sessions/batches for loading the data using the earlier created mappings.
 Created mapplets and reusable transformations.
 Created Workflow, Worklets and Tasks to schedule the loads at required frequency using
Workflow Manager.
 Created connection pools, physical tables, defined joins and implemented authorizations in the
physical layer of the repository.
 Migrated mappings from Development to Testing and performed Unit Testing and Integration
Testing.
Environment: Informatica Power Center8.x, RepositoryManager, Designer,Oracle 8i, SQL, UNIX, Win
2000/NT.
Client: Bharatronics, India Nov 2008 – Aug 2011
Role: Database Developer
Project - 2:
Involved in the design and development of Inventory Control System. It provides information like
productsavailable, quantity on hand, vendor information, vendor evaluationetc. The basic functions

6. include receiving indentsfrom variousdepartmentsandconsolidating,generatingtenderdocuments,
quotationevaluation,generatingpurchaseordersandamendments,schedulingof material receiving,
generating goods receipts, preparing material rejection notes, invoice verification etc.
Responsibilities:
 Participated in system analysis anddata modeling, which included creating tables,views, indexes,
synonyms, triggers, functions, procedures, cursors and packages.
 Writing queries to fetch data from the OLTP system and executed at regular intervals of time.
 Modified existing forms, reports, and graphs as per the enhancement.
 The backend was in Oracle and database operations were handled using stored procedures.
 Worked onallphases of multipleprojects from initial concept throughresearchanddevelopment,
implementation, QA, to live production, by strict adherence to project timelines.
 Moved data from one database to other database, Used SQL*Loader for data migration.
Environment: Oracle 8i, SQL, TOAD, UNIX, Windows 2000/03/NT
Project -1:
Developed a financial accounting system named CPD. This is an application to maintain a database
aboutthe customerswho are financed for motorvehicles and their guarantors.Thesystem maintains
the contract information, restructures the payment procedure and generates reports including
monthly collection/income and list of defaulters.
Responsibilities:
 Participated in system analysis anddata modeling, which included creating tables,views, indexes,
synonyms, triggers, functions, procedures, cursors and packages.
 Writing queries to fetch data from the OLTP system and executed at regular intervals of time.
 Modified existing forms, reports, and graphs as per the enhancement.
 Worked onallphases of multipleprojects from initial concept throughresearchanddevelopment,
implementation, QA, to live production, by strict adherence to project timelines.
 Moved data from one database to other database, Used SQL*Loader for data migration.
Environment: Oracle 8i, SQL, TOAD, Windows.