Hi, I'm Daniel Santiago Guzman

Hi, I'm Daniel
MS Business Analytics candidate at UW Foster actively seeking Data Analyst and Business Intelligence roles. Bridging analytics and strategy to drive measurable business impact.
DSG

About

I'm a MS Business Analytics candidate at the University of Washington Foster School of Business (GPA: 3.85, Top 10%) with 3+ years of experience transforming data into business strategy. I've built ML models that identified 847 vulnerabilities across 50K+ endpoints, generated $672K in incremental revenue through territory optimization, and automated reporting pipelines that save 1,200+ work hours annually. My work spans predictive modeling, causal inference, and business intelligence — always focused on the question that matters most: what should we do next?

Skills

Python
SQL
R
Tableau
Power BI
Databricks
Git/GitHub
AWS
Claude Code
XGBoost
Random Forest
K-means
ARIMA
Prophet
LSTM
A/B Testing
DiD
Synthetic Control
IPW
Double ML
Fine-Tuning
RAG
Prompt Engineering
OpenAI API
ETL Pipelines
Plotly
Seaborn

Experience

My Projects

Featured Projects

Real-world analytics projects solving business problems — from causal inference and A/B testing to ML models and LLM applications.

A/B Testing — Digital Marketing Campaign

Business Problem: Do display ads actually drive conversions across 576K users? Designed a randomized controlled trial with ITT/ATT analysis and segmentation by user type and geography. Impact: Identified a 2.2% conversion lift in inactive users (89% of the base) and a 3.67% lift in non-American users — recommending targeted spend reallocation to improve ROI.

Python
SciPy
statsmodels
pandas

Geo-Experiment — Local Search Advertising ROI

Business Problem: Was Google Maps advertising actually driving incremental store visits across 200 US markets? Applied Difference-in-Differences and Synthetic Control methods across 200 DMAs, controlling for market characteristics. Impact: Proved naive last-click attribution dramatically overstated ROI — enabling accurate multi-million dollar budget reallocation.

Python
DiD
Synthetic Control
statsmodels

Predictive Modeling — Mobile Ad Click-Through Rate

Business Problem: Which ad impressions are actually worth buying? Built CART and XGBoost models on 80K+ impression-level observations to forecast click-through rate. Impact: Recommended targeting the top 5K impressions for a 5.5x ROI versus the untargeted baseline.

Python
XGBoost
CART
pandas

LLM Fine-Tuning — Customer Service Classifier

Business Problem: How do you automate routing and escalation of customer service tickets at scale? Fine-tuned GPT-4.1-mini on 67 curated examples to generate structured JSON outputs with issue tags and safety flags. Impact: Significantly improved classification accuracy and escalation detection versus prompt engineering alone.

Python
OpenAI API
pandas

RAG-Based Recommendation System

Business Problem: How do consulting teams find relevant past solutions without reading thousands of documents? Built an end-to-end RAG system using GPT-4 to semantically search 3 years of project documentation. Impact: 65% resolution rate on standard queries, sub-3-minute response time, reduced hallucinations versus plain LLM baseline.

Python
OpenAI API
NLTK
RAG
Embeddings

Causal Inference Methods Evaluation

Business Problem: Can we trust observational data to make attribution decisions worth millions? Compared IPW, Double ML, and adjusted regression against experimental ground truth on a 2M-user advertising dataset. Impact: Double ML achieved 83% accuracy while naive attribution overestimated lift by 148% — a critical finding for ad spend decisions.

Python
scikit-learn
statsmodels
IPW
Double ML
Certifications & Honors

DataCamp SQL Associate

DataCamp2024

AWS Cloud Practitioner

🔄 In Progress
Amazon Web Services2025

Power BI Fundamentals

Microsoft2024

MIT Sloan Sports Analytics Competition Finalist

🏆
MIT Sloan — Top 3 Global, 20262026

Culture Corps Scholarship

🏆
University of Minnesota2022

Tony Diggs Excellence Awards — Outstanding Collaboration

🏆
PC Connection, Inc.2024
Contact

Get in Touch

I'm actively seeking Data Analyst and Business Intelligence roles. If you're building data-driven products and need someone who bridges analytics and strategy, reach out via email or LinkedIn.

LinkedIn
GitHub