Nancy Crawford

S

Senior Data Scientist at Tandem Security | ex-Snowflake

Tandem Security
Pittsburgh, PA · ET (UTC-5)
6+ years experience
UC Berkeley
English, Spanish
Messaging unavailable

Overview

I work on experimentation at Tandem Security in Pittsburgh. Cut the time to a trustworthy experiment readout from 4 weeks to 3 days. Ran 122 experiments last year and made the readouts self-serve. Before that: Snowflake and Boston Consulting Group. Former debater; now I argue with spreadsheets.

Good reasons to reach out
  • Working sessions on Python
  • Speaking or podcast invitations
  • Thoughtful intros to people in my field
Please don't message about
  • Data broker offers
  • Agency or outsourcing pitches

Prefers short, specific messages

Skills
PythonCUPEDSQLcausal inference

Experience

  1. Senior Data Scientist
    May 2026 - Present
    Tandem Security · 5 mo · Full-time · Pittsburgh, PA
    • Built the experimentation models now used in 7 product decisions a quarter.
    • Taught SQL to 57 non-analysts.
    • Replaced 65 hand-built dashboards with one metrics layer people trust.
  2. Data Analyst
    May 2023 - May 2026
    Snowflake · 3 yr · Full-time · Pittsburgh, PA
    • Taught SQL to 46 non-analysts.
    • Wrote the metric definitions the leadership team reviews every week.
  3. Data Scientist
    Jan 2021 - May 2023
    Boston Consulting Group · 2 yr 4 mo · Full-time · Pittsburgh, PA
    • Wrote the metric definitions the leadership team reviews every week.

Projects

Side project: a recipe search engine
2025

Built with SQL and CUPED. 1432 people used it last year.

Write-up: experimentation in practice
2023

A long-form guide to experimentation for people starting out.

References

No references yet.

Education

  1. UC Berkeley
    BA, Physics
    2016 - 2020

Details

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