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Annabel Irwin is a getotechnical engineer at Sage Geotechnical in Olympia, Wash. Sage provides geotechnical engineering services to the Puget Sound area and throughout the Pacific Northwest.

Annabel Irwin, PE

About Annabel

Annabel Irwin is an experienced project manager and licensed Professional Engineer in Washington.


Annabel has developed and implemented complex geotechnical field investigations, completed infiltration receptor characterizations, and managed construction monitoring projects for the past eight years. Annabel graduated from Saint Martin’s University with a Bachelor of Science in Civil Engineering.

Annabel’s core areas of experience include:

  • Stormwater infiltration feasibility studies

  • Water and wastewater utilities

  • Slope stability/landslide evaluations

  • Culvert replacements/fish passage enhancements

  • School renovations and additions

  • Geotechnical construction evaluations

Outside of work, Annabel enjoys playing volleyball, keeping up with her energetic toddler, and playing board games.

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