Esteban Loetz

Data Analytics | Workflow Automation

CONTACT

location_on Longmont, CO
language estestyle.com

EDUCATION

University of Colorado – Boulder

B.A.
Molecular, Cellular, Developmental
Biology
2012

COURSERA

  • Google Data Analytics Professional Certification

FREE CODE CAMP

  • Responsive Web Design Certification
  • Data Analysis with Python Certification

SKILLS

Languages & Analysis: Python, SQL, Pandas, Matplotlib, Jupyter

App Development & BI: Streamlit, Tableau, Interactive Dashboards, Excel/Sheets

AI & Productivity: Gemini / LLM Integration, LangChain, AI-Assisted Development, Prompt Engineering

WORK EXPERIENCE

Hotel Operations & Automations Specialist

Best Western | 2025 – 2026

  • Housekeeping Live Dashboard (Python, Streamlit, Pandas, Google Sheets): Built real-time multi-device tracking app; digitized PMS data via dynamic ETL pipeline to sync room turnover across departments.
  • Hotel Intelligence Assistant & Analytics App (Python, Streamlit, LangChain, Gemini 2.0, SQLite, Altair): Engineered an AI-driven SQL analytics dashboard using Gemini 2.0 LLMs to query relational PMS database metrics via natural language, featuring dynamic trend visualization, automated data aggregation, and real-time KPI tracking.
  • In-House Guest List & Housekeeping ETL Pipeline (Python, Pandas, OpenPyXL): Architected an automated data transcription pipeline to parse legacy Visual Matrix PMS exports into structured tabular datasets, applying date-range business logic to automate action triggers and streamline guest management workflows.
  • Multi-Period Revenue & Operations Analytics Platform (Python, Streamlit, Pandas, Plotly): Engineered and deployed custom Python/Streamlit data analytics applications to process and visualize hotel operations and Visual Matrix PMS revenue data, automating multi-CSV time-series analysis, dynamic KPI metrics, and seamless Excel export workflows for hotel leadership.

Experimental Research Professional

University of Colorado Denver Behavioral Neuroscience Laboratories | 2015 – 2024

  • Optogenetic & Chemogenetic Implementation: Pioneered chemogenetic techniques and launched optogenetic protocols at CU Denver, expanding research capabilities for advanced neural circuit analysis.
  • Hardware Control & Automation: Taught myself MedState code to program Med Associate operant behavior hardware, automating drug schedule delivery and managing high-volume data collection.

Professional Research Assistant

University of Colorado Boulder Institute for Behavioral Genetics | 2012 – 2015

  • Genotyping & Molecular Analysis: Determined genotypes of multiple mouse strains using PCR, gel electrophoresis, and molecular imaging to ensure genetic profiling integrity.
  • Database Management & Auditing: Managed and streamlined a multi-lab animal database for a pathogen-specific facility, conducting ongoing census audits and cross-referencing inventories to resolve discrepancies.
  • Precision Instrumentation: Operated micro-sampling systems and executed quantification protocols to maintain high-quality experimental data collection.

Undergraduate Researcher

University of Colorado Institute for Behavioral Genetics | 2009 – 2012

  • Experimental Execution: Applied molecular biology techniques to analyze genetic variations in mouse models, focusing on nicotinic receptor differences in knockout strains.
  • Data-Driven Phenotyping: Conducted systematic cross-breeding and behavioral testing to generate reliable datasets for phenotypic characterization.
  • High-Volume Data Pipeline: Managed continuous data collection across a colony of 20 unique mouse strains and hundreds of subjects with rigorous record-keeping.

Management

  • Project Coordination: Collaborated with multiple Principal Investigators to manage overlapping projects, aligning diverse teams with experimental objectives and varied timelines.
  • Operational Oversight: Coordinated inventory management and ensured regulatory compliance across experimental endeavors, facilitating smooth and efficient project execution.

Communication

  • Research Presentations: Delivered clear and engaging oral presentations of research findings to academic peers, colleagues, and public audiences, including at major neuroscience conventions like the Society for Neuroscience.
  • Scholarly Publishing: Co-authored peer-reviewed papers across various scientific domains, effectively translating complex data insights into accessible language.

Leadership

  • Mentorship & Training: Continuously mentored undergraduate students, researchers, and post-doctoral fellows, enhancing team skills and fostering professional growth.
  • Guidance: Provided leadership and guidance on professional conduct for newcomers.

Collaboration

  • Fostered Collaborative Environment: Worked closely with a multidisciplinary team and contributed to experimental designs that informed broader research objectives.
  • Spearheaded Multidisciplinary Initiatives: coordinated cross-disciplinary projects to meet shared research goals.

SELECTED PROJECTS

Hotel Revenue Intelligence Dashboard With AI Query System

  • Built automated data pipeline with SQLite database storing hourly snapshots of hotel metrics, eliminating 2-3 hours of daily manual aggregation
  • Created dynamic KPI dashboard tracking 8+ critical metrics (occupancy rates, ADR, RevPAR, sold-out pressure) withcustomizable date ranges and time-scale views
  • Integrated Google's Gemini LLM with LangChain enabling plain-English queries (e.g., "Which month had highest arrivals?") that automatically generate SQL and visualize trends
  • Delivered production web-based dashboard reducing analysis time from hours to seconds while democratizing data access for non-technical staff

Dynamic Group Matching Analysis with PySimpleGUI

  • Developed a PySimpleGUI desktop application to analyze and optimize group assignments from Excel data, preserving cage mate pairing.
  • Evaluated all possible group combinations, calculating metrics such as means, absolute differences, and the smallest mean difference between groups.
  • Automated data export to Excel and visualized results using Matplotlib, producing line plots that highlight optimal group assignments and minimal variance.
  • Delivered actionable insights to improve decision-making in experimental setups through comprehensive analysis and visualization.

Automated Wheel Running Data Analysis Tool

  • Developed a Python-based application with a user-friendly interface to analyze millions of data points from running wheel experiments logged in Excel files.
  • Automated identification of valid running bouts (≥3 revolutions/min) and categorized activity by light and dark phases, significantly reducing manual processing time.
  • Consolidated raw data into a summary sheet with detailed metrics, ensuring efficient data organization and accuracy.
  • Enabled users to generate phase-specific bar graph visualizations, providing actionable insights into exercise behavior and activity patterns.
  • Delivered a robust, scalable solution that streamlined workflow, accomplishing tasks in seconds that previously required hours.
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