Aspiring Data Analyst with BI & SQL Expertise

Sergio Perales

Houston, TX 832-***-**** ************@******.*** LinkedIn: Add LinkedIn URL

Entry-Level Data Analyst

Professional Summary

Analytical and results-driven professional transitioning into data analytics with 8+ years of experience leveraging data to improve sales performance, customer engagement, and operational efficiency. Proficient in SQL, Python, Excel, Power BI, and Tableau with hands-on experience creating dashboards, analyzing KPIs, and identifying business trends. Strong background in stakeholder communication, problem-solving, and translating data into actionable business insights.

Technical Skills

SQL (queries, reporting, joins, filtering)

Python (Pandas, data cleaning, analysis)

Excel (Pivot Tables, VLOOKUP/XLOOKUP, Power Query, charts)

Power BI & Tableau (dashboards, visualizations, KPI tracking)

Data Analysis, Data Cleaning, Reporting, Data Visualization

Business Intelligence, Metrics Tracking, Trend Analysis

Data Analytics Projects

Sales Performance Dashboard

Built an interactive Power BI dashboard to track sales trends, customer acquisition, and KPI performance using Excel-based datasets. Improved visibility into performance metrics and supported data-driven decision-making.

Customer Retention Analysis

Used Excel and SQL concepts to analyze customer engagement patterns and identify opportunities to improve retention and outreach strategies.

Operational Reporting & KPI Tracking

Created Excel reporting tools and visualizations to monitor team productivity, staffing trends, and sales performance across retail operations.

Professional Experience

Territory Account Manager – AT&T Aug 2024 – Jul 2025

Analyzed customer and market data to identify high-value client opportunities, contributing to a 35% increase in client base growth.

Developed Excel and Power BI dashboards to monitor sales funnel performance and customer behavior trends.

Partnered with stakeholders to interpret KPIs and deliver data-backed recommendations for business strategy.

Performed customer segmentation analysis to support personalized outreach and engagement initiatives.

Account Executive – Vestis Aug 2024 – Jul 2025

Evaluated customer and territory performance data to identify revenue opportunities and support strategic account growth.

Tracked sales metrics and performance trends to improve decision-making and territory planning.

Retail Associate Manager – T-Mobile 2019 – Jul 2024

Led performance analysis initiatives across retail teams, identifying trends and operational improvement opportunities.

Created and maintained Excel dashboards for KPI tracking and performance reporting.

Supported leadership with SQL-based reporting insights related to employee and store performance metrics.

Collaborated cross-functionally to align operational goals with data-driven recommendations.

Retail Store Manager – T-Mobile 2017 – 2019

Analyzed sales and customer behavior data to identify revenue-driving trends and improve operational efficiency.

Built Tableau visualizations to communicate store performance metrics to leadership.

Implemented data-informed staffing and inventory processes to streamline store operations.

Retail Sales Associate – T-Mobile 2012 – 2017

Applied customer segmentation and sales analysis techniques to improve customer engagement strategies.

Achieved Top 1% national sales performance through data-informed customer insights and performance tracking.

Education

Bachelor of Science in Information Technology

University of Arizona Global Campus

Recommendations to Strengthen Resume

Add a GitHub portfolio with SQL, Python, Power BI, or Tableau projects.

Include LinkedIn profile and certifications such as Google Data Analytics or Microsoft Power BI.

Quantify achievements wherever possible using percentages, revenue impact, or KPI improvements.

Tailor keywords to each job description to improve ATS compatibility.

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