RAJKUMAR CHONA

Data Warehouse Engineer / Architect

Richmond, VA     ·     (732) 822-9664     ·     hermes12@gmail.com

 

 

Data warehousing expert with 10+ years of overall software engineering experience and 8+ years of dedicated experience in real time Enterprise data warehouse implementations in HealthCare domain. Have executed a variety of data integration project implementations end to end & performed different roles from ETL Developer to Senior Technical Lead/Architect.

 

 

·         10+ years of overall software engineering experience with 8+ years of experience in Enterprise Data warehousing technologies and 2 years of experience in Mainframe technologies.

·         8+ years of experience in effectively performing complex & challenging Data warehousing projects with end-to-end implementation, and rapidly evolving requirements. Specialized in Data Integration & Extract Transform Load concepts & technology.

·         8+ years of experience in Healthcare Enterprise Data warehousing.

·         Performed Enterprise Data warehouse Senior Technical Lead/Architect role across various Data warehousing projects & have led technical teams of size 5+ resources.

·         8+ years of extensive experience in the ETL tool Informatica Power center & MPP database Teradata.

·         Expert in Software Development Life Cycle (SDLC), involved in various phases like Requirements, Analysis/Design, Development, Testing, Implementation & Warranty.

·         Expert in Designing, Developing & Implementing highly effective & efficient technical solutions to complex & challenging business requirements

·         Excellent communication skills and record for coordination between globally located teams.

·         Exceptional ability to maintain and build client relationships, able to comfortably converse with all facets in the client’s organization.

·         Excellent verbal and written skills, especially with regards to presenting findings to both technical and non-technical audiences.

·         Technical Project Management exposure including Organizing, Planning/Tasking, Tracking and Status Reporting to Management.

·         10+ years of extensive experience in handling Onshore-Offshore modeled projects.

·         Sound knowledge and exposure to Big Data technologies (Hadoop MapReduce, HDFS, Hive, Pig, Sqoop) – Hadoop Basics certified by IBM Big data university

 

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTIONAL

TECHNOLOGY

·         Health Care – Membership, Claims, Provider, Product & Chart of Accounts ·         Telecom – Message Processing & Rating systems ·         Specialized in ICD10 implementation in Enterprise Data Warehouse, Direct Sourcing to Enterprise Data Warehouse, Data Integration, Data warehouse Decommissioning & Repointing projects ·         Implementing projects via traditional SDLC with exposure to LEAN execution methodologies

·         ETL Tools:  Informatica Power center 8.1 ·         Databases:  Teradata 13.1, DB2, IMS ·         Data Profiling Tools:  Informatica Data explorer ·         Languages:  C, C++, Unix Shell scripting,  COBOL, Assembler ·         Big Data:   Hadoop – HDFS, Hive, Pig, Sqoop ·         Configuration Management tools:  ClearCase ·         Scheduling tools:  WLM (Work Load Manager) ·         Project Management Tools:   MS Project ·         Operating systems:  UNIX, Mainframes, Windows. ·         Others:  ReqPro, Test Director, Sharepoint, Planview

 

 

 

 

 

Client Summary: WellPoint is one of the nation’s largest health benefits companies offering a broad range of medical and specialty products, with more than 36 million members in its affiliated health plans and nearly 67 million individuals served through its subsidiaries. One in nine Americans receives coverage for their medical care through WellPoint's affiliated plans.

 

Project Summary: ICD-10 Information Management project focuses on analysis and remediation of the WellPoint’s Information Management data warehouses and business applications by repointing any surviving and ICD-10 impacted asset to the EDWard data warehouse (Enterprise Data Warehouse and Reporting Depot), allowing for reduced costs, reduced remediation activities and increased efficiency opportunities. WellPoint’s response to ICD-10 is to implement a dual support strategy of accepting both ICD-9 and ICD-10s for an undefined period of time. IM EDWard will support dual processing by sourcing and storing both ICD-9 and ICD-10 based claims.

 

·         Participate in evaluating & finalizing ICD-10 remediation strategy based on business needs.

·         Convert the remediation strategy into logical and physical data model solutions.

·         Data Profiling of Enterprise Data warehouse for critical repoint data gaps and help document the profiling results and findings as part of functional requirements

·         Define & document the technical requirements corresponding to the functional requirements

·         Define & document the high level ETL design/architecture corresponding to the technical requirements

·         Responsible for all end-to-end technical activities (environment allocation, capacity planning, high-level architecture & approval, ETL design & review, ETL coding, testing & Implementation).

·         Co-ordinate with the testing team through all testing phases (SIT, UAT, IR, Regression testing). Track the testing iterations, defects, triaging, bug fixes, data reloads, retesting & defect closure.

·         Create test environment, load/copy data & support testing of downstream BI reporting applications repointing to EDWard.

·         Responsible for ensuring that the enterprise ETL standards & guidelines, Coding standards & guidelines for Informatica, Teradata & Unix are met

·         Formulate & communicate to downstream systems/users, the release information for each of the implementing releases of the project

·         Lead technical team of 6 onshore resources, planning, prioritizing, tracking & reviewing of tasks with the team

·         Estimate the Level of Effort for end-to-end development activities, review with management and obtain approvals.

·         Technical Project Management including Planning/Tasking, Tracking and Status Reporting to the Project Manager of all technical activities.

 

Technologies Used: Teradata 13.1, Informatica 8.1, UNIX, ClearCase, WLM, ReqPro, Test Director, MS Project, Planview, Sharepoint

 

 

Project Summary: The Enterprise Data Warehouse (EDWard) project aims to source historic and current data directly from WellPoint’s core systems and serve as the enterprise’s active data warehouse. Core subject area data from operational source systems WGS, CS90, STAR, FACETS, ACES and NASCO were addressed in separate direct sourcing initiatives.

 

The new EDWard content would not be complete without the additional EDL (Enterprise Data Layer) R1 data (not currently sourced from direct sourcing initiative) thus requiring dual maintenance on the physical structures, applications, security, tracking of data integrity/enhancements requests, as well as the complication of handling multiple model structures for data retrieval.  With the combination of this redirection project and the direct sourcing initiatives, core subject area data will be available across the entire line of business in one warehouse structure, minimizing the duration of dual maintenance and support. EDL R1 to R2 EDW Redirection project aimed to redirect components of the current EDL Release 1 (R1) data and data population procedures to the Enterprise Data Warehouse (EDW) Release 2 (R2) data model.

 

·         Lead technical team of 5 onshore resources, planning, prioritizing, tracking & reviewing of tasks with the team

·         Work closely with Business and IT SMEs to gather and document the functional requirements for the project.

·         Formulate & document the technical requirements corresponding to the functional requirements

·         Plan & perform data profiling analysis to validate complex data mapping rules and source data discrepancies

·         Involve in analysis and design of logical & physical data model for Health Risk Assessment subject area.

·         Design the data flow architecture for both history & incremental data requirements.

·         Prepare Overall Technical Design Document & ETL Specifications.

·         Perform Detail design, Coding & testing for critical requirements

·         Review the detail design assigned to the team, suggest changes leading to a better, fool proof design.

·         Perform code review & performance tuning review of ETL code components created by the team, and ensure all standards and guidelines are met & data loads perform at optimum level.

·         Co-ordinate with the testing team through all testing phases (SIT, UAT, IR, Regression testing). Track the testing iterations, defects, triaging, bug fixes, data reloads, retesting & defect closure.

·         Estimate the Level of Effort for end to end development activities, review with management and obtain approvals.

·         Formulate & communicate to downstream systems/users, the release information for each of the implementing releases of the project

·         Ensure ETL guidelines are properly followed. Code review and performance tuning review to ensure code is up to standards and performance optimized.

·         Track & Report status of all technical tasks to the project manager on a periodic basis

 

Technologies Used: Teradata 13.1, Informatica 8.1, UNIX, ClearCase, WLM, Test Director, MS Project, Planview, Sharepoint

 

 

Project Summary: WellPoint has been holding the Membership data in the enterprise data warehouse (EDWard) on a daily basis (members enrolled from 2004 are captured into EDWard). Since data warehouse has to integrate several transactional/heterogeneous business systems data into it, source systems like WGS, CS90 and STAR’s membership data has been integrated into EDWard on an on-going basis. The purpose of this project is to integrate similar members into a single group and assign them the Unique ID, which is known as Consumer ID.

 

·         Analyze the existing Lab Data Integration solution to arrive at the final design for Consumer Integration.

·         Build prototype on Teradata environment & showcase the % of consumer derivation out of higher volume of members.

·         Design the high level end to end ETL process for the identified functional requirements.

·         Task assignment of detailed design, coding and unit testing tasks to team members and review.

·         Build & Unit test ETL code components (Informatica mappings, workflows, Teradata BTEQ scripts, Unix shell scripts).

·         Code review to ensure coding standards and guidelines are adhered to.

·         Performance tuning of badly performing queries in Teradata environment.

·         Support System Integration testing & User Acceptance testing – conduct defect triage meetings, analyze testing observations, apply fixes for defects & retest.

·         Prepare and review the SDLC workbook & work closely with the Database Administrator Group, Informatica Administrator Group, Clear Case Admin to promote the code components to SIT, UAT & IR testing environments and finally to Production.

 

Technologies Used: Teradata 13.1, Informatica 8.1, UNIX, ClearCase, WLM, Test Director

 

 

Project Summary: Direct sourcing from the operational systems to EDW (Enterprise Data Warehouse) will position EDW as an active data warehouse with the potential to load data almost as fast as it is added or updated on the operational system. The purpose of the IM EDW – CS90 & WGS Direct Sourcing project is to develop a detailed approach for sourcing CS90 & WGS data directly to the EDW base model. The subject areas include claims, membership, product, provider & chart of account from January 2004 forward. The on-going plan is to only load new or changed records to the EDW base model.  This will reduce the volume of data extracted and loaded which reduces any impacts on the Information Consumers, applications, and processes using the operational systems or the EDW base model data.

 

The data will be moved to a pre-staging/Landing zone area “as-is” from the operational systems, with a minimum of data standardization occurring during the extract. The idea is to move the data as quickly as possible to avoid affecting the processing or availability of the operational systems. The data would then be mapped from the landing area to the base model for Operational reporting elements defined by the BI strategy team.

 

·         Data profiling analysis to help IT SMEs define the attribute mapping/transformation rules.

·         Proof of concept for Change Data Capture using a home grown method and Informatica power exchange.

·         Design & build mainframe extract processes to extract history & on-going data from Mainframe IMS, DB2 & flat file sources

·         Design the end to end ETL flow (both high level & detailed design) for all membership tables.

·         Prepare Technical Design Document & ETL Specifications.

·         Build & Unit test ETL code components (Informatica mappings, workflows, Teradata BTEQ scripts, Unix shell scripts).

·         Code review to ensure coding standards and guidelines are adhered to.

·         Performance tuning of badly performing queries in Teradata environment.

·         Support System Integration testing & User Acceptance testing – conduct defect triage meetings, analyze testing observations, apply fixes for defects & retest.

·         Prepare and review the SDLC workbook used for code migration to all testing environments and finally to Production.

·         Work closely with the Database Administrator Group, Informatica Administrator Group, Clear Case Admin to promote the code components to SIT, UAT & IR testing environments and finally to Production.

·         Post production monitoring and support.

 

Technologies Used: Teradata 13.1, Informatica 8.1, UNIX, ClearCase, WLM, Test Director, COBOL, IMS, DB2, File-AID

 

 

Client Summary: AT&T is one of the leading worldwide providers of communications services to businesses & individual customers. A global leader in delivering a full portfolio of end-to-end reliability and highly secure network, voice, data and IP solutions to customers, and its service portfolio has been widely regarded by third parties as industry-leading.

 

Project Summary: AT&T Application maintenance is an application value maintenance engagement. Message Processing System is one of the most critical of AT&T’s call data processing systems. It gets customer made calls as input, rates them according to the customer’s calling plans and sends them for billing to internal and external billing systems. With unique design and architecture, Message Processing System has set standards in the Telecommunications Billing world.

 

As a lead developer, responsible for all of the below deliverables/activities

 

·         Development activities for monthly enhancements (Design, Coding & Unit testing)

·         Performing ADHOC reporting functions

·         Regular application maintenance activities like responding or resolving User queries/requests, User tickets, production monitoring and abend fixing

 

As a lead tester, responsible for all of the below deliverables/activities

 

·         Test Strategy outlining all of the testing activities for the project, testing timelines etc

·         Test Plan & cases

·         Test environment & Test data setup

·         System testing

·         Regression testing

·         Interface/Pair testing

·         Shipping software components to production for each software release (mostly monthly releases)

 

Technologies Used: Assembler, COBOL, DB2, IMS, EasyTrieve, REXX, JCL, TSO/ISPF, VSAM, SORT, FILE-AID, COMPAREX, Connect:Direct, IDCAMS, CA-View (SAR), CA-Librarian

 

 

Master of Science, Software Engineering	Birla Institute of Technology & Science, Pilani, 2006
Bachelor of Engineering, Mechanical	Government College of Technology, Coimbatore, 2002

 

 

Work Permit: Valid Green Card Holder/Permanent Resident

Relocation: Willing to relocate

References: Upon Request