Spencer Zeigler, Ph.D.

Geochronologist || “Punchy Schematic Maker” || Data Wrangler

Broomfield, Colorado, United States

About

I am an earth scientist, an analyst, geochronologist, statistician, and data visualization wizard. I am a Ph.D. candidate and research scientist at the University of Colorado where I developed and executed innovative and original research on kimberlites (diamond-bearing volcanoes) and deep-time landscape evolution using thermo/geochronology (mainly apatite and zircon (U-Th)/He and U-Pb). My interests are developing new methods to tackle complex problems in the Earth Sciences and discovering innovative, creative, and understandable ways to share those results both orally and visually. I won 2nd place at the 3 Minute Thesis competition--if you have 3 minutes and want a quick and understandable summary of my doctoral research, give it a watch: https://youtu.be/K9leE15xHZY?si=Qi_p1adeDay4x7FM&t=3629 I am interested in continuing to do geoscience research, especially in geochronology or mineral resources. I would love to apply my data analysis, statistics, research, and data visualization skills to problems small and large across a variety of fields. Nothing makes me happier than clean data that can be easily interrogated to yield practical and actionable insights. I am adaptable, dependable, goal-oriented, a quick-learner, and always here to lend a helping hand. I enjoy spending my free time biking, reading horror novels, baking (and eating!) sweet gluten free treats, and lounging in the sun with my rescue cat.

Experience

  • Senior Data Scientist at Colorado Department of Revenue
    Jun 2025 - Present · 1 yr 1 mo

    Senior Data Scientist/Statistical Analyst III with the DOR-Marijuana Enforcement Division (Data Analytics team)

  • University of Colorado Boulder (5 yrs 11 mos)
    • Ph.D. Candidate
      Aug 2020 - Present · 5 yrs 11 mos

      • Expected May 2025 • Advisor: Dr. Rebecca Flowers • Certificate in Data Science Statistics Relevant coursework: - Geochronology and Thermochronology | Professor Becky Flowers - Statistical Methods and Applications I and II | Professor Brian Zaharatos - Data Visualization | Professor Seb Kopf - Statistical Collaboration and Advanced Statistical Collaboration | Professor Eric Vance

    • Research Assistant
      Aug 2020 - Present · 5 yrs 11 mos

      • Collected apatite and zircon (U-Th)/He, U-Pb, and trace element using laser ablation inductively coupled mass spectrometry (ICP-MS) and a noble gas extraction and measurement line (ASI Alphachron). • Complied and integrated preexisting geochronologic, sedimentologic, petrologic, and thermochronologic data from a variety of published and unpublished sources with newly collected geochronologic and thermochronologic data. • Organized and managed of hundreds of rock and mineral samples sourced from international collaborators, personal collections, private corporations, and geological surveys. • Created and managed geochronologic databases in Excel, R, and QGIS. • Characterized and synthesized volcanic, economic, and sedimentologic deposits and resources for my study region. • Communicated with government agencies, private companies, and individuals external to the university to collect data and information unavailable through public sources. • Synthesized information in the form of visual, oral, and written technical abstracts and journal publications. • Created publication worthy figures, diagrams, and schematics for visual, oral, and written modes of communication for both experts and non-experts. • Secured over $5,700 in travel grants from conferences and the Department of Geological Sciences at CU Boulder.

    • Statistical Collaborator
      Aug 2022 - May 2023 · 10 mos

      These projects were completed for course credit while taking Statistical Collaboration (Professor Eric Vance) during academic year 2022-2023. This was not a paid position, but the experience of working closely on statistical projects as a collaborator was invaluable. A small selection of the projects I worked on are listed below: • Assisted a PhD candidate in Civil Engineering create and interpret linear models and effective data visualizations in R for her dissertation, which was successfully defended in November 2022. • Created a data pipeline for a post-doctoral researcher in R that extracted data from a Raman spectrometer, combined it with observational data, and output a clean data table and a series of plots. • Worked with a professor at CU Boulder to analyze survey data. This included: 1) performing sentiment analysis, 2) creating dummy variables, and 3) using various model selection techniques for categorical data while controlling for a number of different variables.This data analysis was used to publish a white paper within the department. • Attended a series of virtual R short course modules attended by > 50 participants and assisted with coding questions and errors. Led a virtual workshop on regular expressions during the "Working with Text Data" module.

  • Private Tutor at Wyzant
    Nov 2018 - Present · 7 yrs 8 mos

    • Scheduled tutoring sessions online and in-person with students in middle school through adulthood. • Tutored geological sciences including structural geology, petrology, and introductory classes. • Acted as a mentor for students struggling to adapt to college-life and classes.

  • Director of Data and Analytics at CU Boulder - Graduate and Professional Student Government
    May 2023 - May 2025 · 2 yrs 1 mo

    • Managed the collection, security, and verification of campus-wide election data for positions within the Graduate and Professional Student Government. • Organized, visualized, synthesized, and communicated insights from data to Graduate and Professional Student Government officers and university administration. • Oversaw the proper storage and organization of data collected over the past 5 years so that it remains accessible and understandable for years to come. • Restructured election procedures, wrote and clarified documentation, and collaborated closely with the Administration team throughout the year. • Spearheaded website creation and management through WebExpress. • Coordinated a system-wide move from the Google workspace and Slack to a Microsoft based system (including OneDrive and Teams). This required constant and close contact with 15 different account holders to successfully transfer >6 years’ worth of documents, data, and sensitive financial records.

  • External Consultant at CDH Consulting
    Jan 2024 - Mar 2024 · 3 mos

    • Effectively communicated and collaborated with the project manager to understand the details of the project, share definitions and interpretations of statistical jargon with non-experts, and present results in a timely manner. • Researched cutting-edge statistical methods to efficiently and robustly answer the statistical questions and deal with the unique structure and type of data. • Executed a robust statistical analysis of complex geochemical data in R (programming language) and delivered a plain-language report on the methods and results. • Organized the data, code, and report for effective sharing between stakeholders in the project. • Familiarized myself with Colorado state guidelines for environmental remediation and geochemical limits on a variety of soil and groundwater samples.