Breaking Games logoBreaking Games Externship via Extern·🟢 Open to work
Yuliska Villarreal portrait

Financial operations professional turning data into insights and decisions

4+ years in financial & business operations, AR, billing, reconciliations, AP. Detail-oriented, organized, process-improvement focused. Building SQL & financial modeling for FP&A.

Work samples

Projects include hands-on work building SQL databases from raw operational data, applying the same rigor I bring to financial reconciliation and reporting.

  • SpaceX Financial Statement and Investment Analysis
    SpaceX Financial Statement and Investment Analysis

    Personal Project — SpaceX Financial Analysis · Sep 2026

    SpaceX Financial Statement and Investment Analysis

    I conducted a three statement financial analysis of SpaceX using income statement, balance sheet, and cash flow data presented in the company’s Form S-1 registration statement. The objective was to evaluate the company’s revenue growth, profitability, liquidity, capital investment, free cash flow, v

    Financial AnalysisFinancial Statement AnalysisExcelFinancial ModelingValuation
  • SQL & Database Architecture Externship with Breaking Games
    SQL & Database Architecture Externship with Breaking Games
    Breaking Games logo

    Breaking Games · ✅ Verified by Extern · ⏱️ In progress

    SQL & Database Architecture Externship with Breaking Games

    Turn six messy CSVs into an analytics database and a Q4 dashboard that drives real business decisions. SQL + Claude.

    Analytics Database DesignData AnalysisSQL FundamentalsData Storytelling

About me

4+ years in financial & business operations, AR, billing, reconciliations, AP. Detail-oriented, organized, process-improvement focused. Building SQL & financial modeling for FP&A.

Bilingual financial operations professional with 4+ years of experience supporting billing, accounts receivable, reconciliations, payment tracking, and financial reporting across technology and service environments. Skilled in Excel-based analysis, and transforming operational data into actionable insights. Combines strong financial controls, data accuracy, and process- improvement capabilities with hands-on experience in customer and vendor operations.

Externships

SQL & Database Architecture Externship with Breaking Games

In progress

Experience

Content Analyst (Google Ads)

Highspring, San Jose, California · July 2026 – Present

Administrative Specialist (Temp.)

Highspring, San Jose, California · April 2026 – July 2026

Content Analyst (Google Ads)

Highspring, San Jose, California · Nov. 2025 – April 2026

Financial Operations Specialist

AmpUp, Santa Clara, California · Aug. 2025 – Oct. 2025

Billing & Customer Operations Specialist

SocialLex.com, Barranquilla, Colombia · Oct 2022 – Nov. 2024

Executive Assistant

Inversiones Landazabal Daguer & CIA S en C, Barranquilla, Colombia · Nov. 2018 – Aug. 2019

Business Development Assistant

Intedya, Barranquilla, Colombia · Jun. 2016 – Dec. 2016

Education

University of West Los Angeles (UWLA) | Inglewood, CA

M.S. in Leadership, Management, and Technology, Business Analytics Concentration · Class of 2028

UCSC Silicon Valley Extension) | Santa Clara, CA, USA

Data Analytics and Data science Certificate. · Class of 2025

Universidad de la costa CUC | Barranquilla, Colombia

BSc in Finance and International Relations. · Class of 2015

Skills

Financial AnalysisBilling OperationsAccounts ReceivableCash ApplicationAccount ReconciliationAR AgingAccounts PayableVendor PaymentsExpense TrackingERP systemsProcess ImprovementData QualityEnglish/SpanishExcelTableau
Back to work

SpaceX Financial Statement and Investment Analysis

I conducted a three statement financial analysis of SpaceX using income statement, balance sheet, and cash flow data presented in the company’s Form S-1 registration statement. The objective was to evaluate the company’s revenue growth, profitability, liquidity, capital investment, free cash flow, v

Financial AnalysisFinancial Statement AnalysisExcelFinancial ModelingValuation

Overview

I conducted a three statement financial analysis of SpaceX using income statement, balance sheet, and cash flow data presented in the company’s Form S-1 registration statement. The objective was to evaluate the company’s revenue growth, profitability, liquidity, capital investment, free cash flow, valuation, and overall investment risk.

SpaceX Financial Statement and Investment Analysis

What I've accomplished

I built an Excel-based three-statement model to perform trend and common-size analysis and evaluate growth, profitability, liquidity, cash generation, capital intensity, and valuation. I connected the results to SpaceX’s vertically integrated, capital-intensive expansion strategy and distilled the analysis into an executive investment recommendation.

Outcome

Revenue grew 79.83% from 2023 to 2025 and gross margin reached 49.4%, but operating margin fell to -13.9% and free cash flow to -$14.0B as CapEx rose to 111.1% of revenue. Despite $9.6B in working capital, the 22.3x price-to-sales multiple and continued financing needs supported a high-risk, long-term speculative investment recommendation.

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✅ Verified by Extern · ⏱️ In progress

SQL & Database Architecture Externship with Breaking Games

Turn six messy CSVs into an analytics database and a Q4 dashboard that drives real business decisions. SQL + Claude.

Analytics Database DesignData AnalysisSQL FundamentalsData Storytelling

Overview

The externship converted six messy CSV files from an e-commerce operation into a structured analytics database and a Q4 dashboard. The work cataloged each source, defined schemas, and implemented transformations and joins in SQL. Deliverables included the cleaned database schema and the dashboard-ready dataset.

SQL & Database Architecture Externship with Breaking Games

What I've accomplished

I inventoried six raw data sources, implemented SQL queries in a SQLite database, and produced a living document with five instant answers (top products by units and revenue, catalog size, Meta ad spend, unique checkout sessions).

Project breakdown

I inventoried six raw data sources, wrote and ran SQL queries against the SQLite database, and recorded five instant answers (top products by units and revenue, catalog size, Meta ad spend, unique checkout sessions) in a living document.

Google Docs
Access

A scattered four-table dataset was unified by building dim_product and joining it to events and sales. I aggregated product performance with GROUP BY to produce a fact table and a ranked reorder recommendation based on revenue and units sold.

Google Docs
Access
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✅ Verified by Extern

Amazon Operational Strategy & People Analytics Externship

Imagine shaping how AMAZON — yes, THE Amazon — welcomes and keeps its workforce. Every year, Amazon loses billions because new hires leave before Day 90.You’re going to fix that. In this externship, you’ll web scrape real-world employee reviews from across the web, extract actionable insights, and design persona-driven strategies to help Learning Ambassadors connect smarter, faster, and more humanely.It’s part research, part strategy—and all about learning how people data drives big decisions.

OperationsStrategyAI & MLData AnalysisPythonPresentation Skills

Overview

The work mapped operational roles across an Amazon fulfillment centre, collected and cleaned employee voice data from Glassdoor and YouTube, and prepared that dataset for analysis. Themes and sentiment were extracted and grouped into named workforce segments. The final deliverables included prioritized cohort scores and a two-week, pilot-ready scheduling intervention with a five-slide pitch deck.

Amazon Operational Strategy & People Analytics Externship
Google Slides
Access

What I've accomplished

I produced a role-by-role workforce structure, a cleaned CSV of employee feedback, theme-tagged sentiment summaries, ranked workforce segments, and a two-week scheduling pilot with a five-slide pitch deck.

Project breakdown

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