Teke Gashaw

Lincolnton

Summary

Senior Data Analytics and Power BI Developer with 6+ years of experience building high-impact Business Intelligence solutions for enterprise environments. Specialized in translating complex financial and operational data into optimized semantic models, advanced analytics, and executive-ready dashboards. Strong expertise in Power BI, SQL Server, PostgreSQL, Tableau, Python, and R, with a proven track record of delivering scalable ETL pipelines, performance-tuned data models, and predictive insights. Experienced in Agile delivery, BI DevOps, and governance-driven analytics, with a consistent focus on accuracy, performance, and secure data access.

Overview

years of professional experience

Work History

Senior Data Analytics / Power BI Developer

Travelers Companies Inc.

New York, NY

01.2025 - Current

Architected enterprise-scale Power BI solutions integrating SQL Server and PostgreSQL to support organization-wide analytics initiatives.
Designed and maintained robust ETL workflows using SSIS, enabling reliable ingestion, transformation, and audit-ready data processing.
Engineered complex DAX calculations to deliver accurate financial metrics, executive KPIs, variance reporting, and trend analysis.
Refined Power Query (M) transformations to improve dataset performance, reusability, and refresh efficiency.
Applied predictive modeling techniques using Python and R to forecast financial performance and identify risk indicators.
Delivered interactive Power BI and Tableau dashboards with drill-through, filtering, and self-service capabilities for senior leadership.
Optimized SQL queries, indexes, and stored procedures, achieving measurable reductions in report execution times.
Led Power BI lifecycle management across environments using deployment pipelines and Azure DevOps CI/CD practices.
Implemented enterprise security models, including Row-Level Security, to ensure controlled and compliant data access.
Partnered closely with business stakeholders to convert analytical needs into scalable BI solutions and actionable insights.
Contributed actively within Agile teams, participating in sprint planning, backlog refinement, and delivery tracking via Jira.

Data Analytics / Power BI Developer

Allstate Corporation

Northbrook, IL

10.2021 - 12.2024

Collaborated with data engineering teams to design and enhance SSAS Tabular models for high-performance analytics.
Developed advanced DAX logic to support enterprise KPIs, trend comparisons, and cross-functional reporting requirements.
Created dynamic Power BI dashboards featuring drill-down, drill-through, and parameter-driven interactivity.
Designed and supported SSRS reports with automated subscriptions for scheduled and compliance reporting.
Played a key role in evolving a centralized data warehouse, ensuring consistency across reporting and analytics layers.
Conducted SQL tuning initiatives, improving query performance through indexing strategies and query refactoring.
Led modernization efforts by migrating legacy SSRS reports into Power BI, improving usability and adoption.
Worked directly with business users to clarify reporting needs and rapidly deliver high-value insights.
Supported Agile delivery cycles through sprint ceremonies, demos, and retrospectives.

Data Analyst / Power BI Developer

Cigna Corporation

Bloomfield, CT

10.2018 - 09.2021

Enhanced database performance by optimizing SQL queries, views, and indexing strategies.
Developed SSRS reports and Power BI dashboards supporting sales, inventory, and operational analytics.
Leveraged Power BI, Tableau, and R to uncover patterns, trends, and actionable insights across business domains.
Supported data migration initiatives by validating data accuracy and reconciling legacy-to-cloud transitions.
Performed statistical analysis in R to support marketing performance and sales forecasting initiatives.
Assisted in building and maintaining reliable data pipelines for ongoing reporting needs.
Implemented documentation and version control standards for BI artifacts and SQL scripts.
Provided production support for BI platforms, resolving data quality, refresh, and reporting issues.
Participated in Agile stand-ups and collaborative workflows to ensure timely delivery.

Education

Bachelor of Science -

Computer Science

Skills

BI & Reporting: Power BI, Tableau, SSRS, SSAS (Tabular)
Databases: SQL Server, PostgreSQL
Languages & Expressions: SQL, T-SQL, DAX, Power Query (M)
ETL & Integration: SSIS, Informatica

Analytics & Programming: Python, R
Data Modeling: Star Schema, Snowflake Schema
DevOps & ALM: Azure DevOps, Git, Power BI Deployment Pipelines
Security: Row-Level Security (RLS), Object-Level Security (OLS)
Collaboration & Tools: Jira, Agile/Scrum, Microsoft Excel, SharePoint, Microsoft 365

Timeline