Summary
Overview
Work History
Education
Skills
Websites
Languages
Timeline
Generic

Efrata Legesse

Rockville,MD

Summary

6+ years of Experience in various domains like Insurance, Financial and Retail with expertise in providing ETL/Business Intelligence solutions using Microsoft components (SSMS,SSIS and SSRS), Database Design, Development and Implementation in SQL Server 2014/2016/2019/2022. Experience using complex SQL queries, SQL Scripts to perform efficient data load based on complex business rules and produced results for users and T-SQL Programming (Stored Procedures, Cursors, Functions, and Triggers) Strong technical knowledge in MS SQL Server development including DTS, Performance tuning, Reporting, Designing logical/physical databases and Trouble shooting. Expert level skills in Objects creation such as Tables and Views, Table Normalization, User created Data Types, user defined functions, views, user profiles, data dictionaries, data integrity, Indexes and appropriate Triggers to facilitate efficient data manipulation and data consistency. Working on SSIS various tasks such as Control Flow (Execute SQL task, for each loop container, Data Flow task, File System) and transformations such as FTP Task, Aggregate, Sort, Lookup, Fuzzy Lookup, SCD (Slowly Changing Dimension), Merge join multicast, conditional split, derived column etc. Supported team in resolving SQL Server Reporting Services and T-SQL related issues and Proficiency in creating different types of reports such as Cross-Tab, Conditional, Drill-down, Top N, Summary, Form, OLAP and Sub reports, and formatting them. In-depth knowledge of Transact-SQL (Data Definition Language, Data Manipulation language). Strong experience in providing Logging, Error handling by using Event Handler, and Custom Logging for SSIS Packages. Extensive experience in ETL design/development using MS DTS and SSIS including data extraction and transformation between multiple data sources (Oracle, MS Access, and MS Excel). Experience in Creating and Deployment and Administration of SSIS and SSRS packages. Experienced in report generation using SQL Server Reporting Services (SSRS) and Excel spreadsheet lately using SQL Server 2014/2016/2019. Conducted Data Analysis and did Data Modeling and Created the ER diagrams using Logical Schema and Star Schema. Experience in implementing different types of Replication models like Snapshot, Merge and Transactional. Excellent communication and interpersonal skills, self-motivated, quick learner and determination to learn new technologies, strong troubleshooting skill and excellent interpersonal and team work skills.

Overview

8
8
years of professional experience

Work History

SQL/ BI/ETL Developer

DMI
Bethesda, MD
12.2023 - Current
  • Translated business needs into data analysis, business intelligence data sources and reporting solutions for different types of information consumers
  • Developed complex T-SQL code such as Stored Procedures, functions, triggers, Indexes and views for the application
  • Used Joins, correlated and non-correlated sub-queries for complex business queries involving multiple tables & calculations from different databases
  • Created SSIS package to load data from XML Files and SQL Server by using Lookup, Fuzzy Lookup, Derived Columns, Condition Split, Term Extraction, Aggregate, Pivot Transformation, and Slowly Changing Dimension
  • Used SSIS to create ETL packages to Validate, Extract, Transform and Load data to Data Warehouse and Data Mart Databases
  • Developed Unit Test Plans for SSIS packages for checking the functionality of each component
  • Scheduled Jobs for executing the stored SSIS packages which were developed to update the database on Daily basis using SQL Server Agent
  • Generated Sub-Reports, Cross-tab, Conditional, Drill down reports, Drill through reports and Parameterized reports using SSRS
  • Responsible for Monitoring and Tuning Report performance
  • Configured the report viewing security for various users at various levels using Report Manager
  • Tools & Technologies: T-SQL, MS SQL Server Integration Services 2016, MS SQL Profiler, SQL Query Analyzer, SQL Server Index Tuning Wizard, MDM, Visual Studio, Erwin, MS Access and Power Pivot

SQL Server DWH/BI Developer/Data Analyst

PNC Financial Services
Pittsburg, PA
09.2019 - 11.2023
  • Involved in Agile methodology by analyzing business requirements and understanding the functional work flow of information from source systems to destination systems, completed work through Sprints
  • Interacted with Development Teams and Managers to analyze business needs and developed technical specifications
  • Interacted with Business team to collect data for the conceptual design of the system
  • Coordinated with business users to understand business needs and expectations
  • Involved in requirement gathering, feasibility studies and organizing the software requirements
  • Involved in analysis and review of software and business requirement documents
  • Involved in defining the source to target data mappings, business rules and data definitions that are used as source by ETL developers
  • Created data profiling reports with valid values, data quality, Null ratio, Column Value Distribution, Column Statistics etc
  • And validating them with data present in Source systems
  • Revisiting created Data Mapping documents in case of any Mappings or Transformation logic changes
  • Helped Data Architect by providing the artifacts that are needed to consider while designing the EDW
  • Conducted sessions and worked alongside with the Business analysts to create technical specifications and mappings for Business Data Glossary and reports
  • Involving in analysis of Report design requirements and actively participated and interacted with Business Analyst to understand the Business requirements
  • Generating Corporate Reports for Management Committee using SQL Server Reporting Services (SSRS) and Excel
  • Created tables using T-SQL queries to store the data and also creating database objects like functions, stored procedure, Clustered and Non-clustered Indexes using MS SQL Server
  • Experience in Data Analysis and Data Profiling using SQL and Excel on large volume of data sets like Teradata, Oracle, Flat files, SQL Server
  • Experience in creating data profiling reports with valid values, data quality, Null ratio, Column Value Distribution, Column Statistics etc
  • And comparing them with source Data Profiling Results
  • Environment: SQL Server 2019, T-SQL, SQL Server Management Studio, Visio, Excel Reports, Outlook, Service Center

MS SQL/ETL/ BI Developer

Booz Allen
Rockville, MD
03.2017 - 08.2019
  • Wrote Advanced SQL queries, created dynamic Stored Procedures by using input values
  • Created/Updated Stored Procedures, Triggers, Functions, Cursor, Views, and Indexes with extensive use of T-SQL
  • Created SSIS packages to migrate data from different data sources to data warehouse
  • Successfully extracted transformed and load data into data warehouse
  • Created packages by testing and cleaning the Standardized Data by using tools in Data Flow Transformations (Data Conversion, Export Column, Merge join, Sort, Union all, Conditional Split and more) for existing/new packages and huge CSV file import from different data sources and other ongoing tasks for mapping
  • Extensively designed the packages and data mapping using Control flow task, Sequence container task, Dataflow Task, Execute SQL Task, Data conversion task, Derived Column task and Script Task in SSIS Designer
  • Scheduled SSIS packages for running monthly and weekly feeds from various guarantors and multiple servers and resources
  • Involved in enhancing and deploying the SSIS Packages from development server to production server
  • Responsible for the Performance tuning of the SQL Commands with the use of the SQL Profiler and Database Engine Tuning Advisor
  • Installed and Configured SQL Server Active/Active and Active/Passive clusters
  • Monitored Scheduled jobs and alerts
  • Designed and developed ETL solutions for transformation of data from source transactional systems or other data feeds, into a dimensional database, or other destinations
  • Created, Scheduled, Generated and optimized ETL jobs
  • Created and maintained technical documentation using defined technical documentation templates
  • Contributed to the creation of solid coding techniques and recommended and reviewed coding standards
  • Evaluated database performance and performed maintenance duties such as Tuning, Backup, Restoration and Disaster Recovery for the data
  • Wrote documentation, data warehouse artifacts and data lineage for ETL tools
  • Business Skills / Technical Skills: MS SQL Server 2019/2016/2014 Visual studio 2017/2019 (SSAS/SSIS/SSRS), Microsoft Access 2007/2010, Microsoft Excel (Pivot Table), OLAP and OLTP, Outlook, MS SQL Profiler, SQL server Query Analyzer, Index Tuning Wizard, C#
  • Net, VB.Net
  • / Share point, ADO.NET, ASP.Net, Frame Work 2.0, MDM, Oracle, DB2, Dash Board by Crystal report, Erwin, MS Access

Education

Bachelor’s -

Skills

  • SQL Server 2014
  • SQL Server 2016
  • SQL Server 2019
  • Oracle
  • DB2
  • SQL
  • T-SQL
  • PL/SQL
  • Net
  • C#
  • VB
  • XML
  • DMX
  • MDX
  • Windows Server 2008
  • Windows Server 2010
  • Linux
  • Unix
  • SSIS
  • SSAS
  • SSRS
  • Tableau
  • Crystal Reports
  • DTS
  • BCP
  • Stored Procedures
  • Cursors
  • Functions
  • Triggers
  • Data Modeling
  • Erwin
  • JSON
  • Service
  • JIRA
  • GitHub
  • SVN
  • Agile Methodology
  • MS Office 2007
  • MS Office 2013
  • FTP

Languages

Amharic
Native/ Bilingual

Timeline

SQL/ BI/ETL Developer

DMI
12.2023 - Current

SQL Server DWH/BI Developer/Data Analyst

PNC Financial Services
09.2019 - 11.2023

MS SQL/ETL/ BI Developer

Booz Allen
03.2017 - 08.2019

Bachelor’s -

Efrata Legesse