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Company Profile

Confluence founders, Ryan Yarbrough and Doug Sommerville, have been working together for over ten years in environmental science and construction. Confluence is the integration of their academic background in hydrology, ecology, biology and geomorphology with the fundamentals of landscape design and construction. View our Statement of Qualifications 

Confluence Owners

Ryan Yarbrough

Project Manger, Administrative Lead

With a background in hydrological and environmental sciences, Mr. Yarbough combines a rich background in garden and landscape design with his appreciation and understanding of natural resources. Prior to Confluence, Mr. Yarbrough founded and managed his own landscape and gardening firm, Yarbrough Gardens. Focusing on landscape design, project management, and client communications, Mr. Yarbrough drives all aspects of client relations and end to end project administration.


Doug Sommerville

Site Manager, Environmental Specialist

Starting his career in the Peace Corps as an Aquaculture Program Director, Mr. Sommerville’s background as a landscape foreman and hydrological field technician brings… As the Confluence site manager and field specialist, Mr. Sommerville coordinates all day to day activities at the job site, including managing all Confluence support staff.


Confluence Crew and Team Members

Kevin Leopold

Project Foreman

  • BS,  Earth  Science, UC  Santa  Cruz, 2000
  • AA,  Liberal  Arts, Cabrillo  College,  1998

Resume coming soon

Devin  Stewart

Restoration Technician

  • BS,  Earth  Science, UC  Santa  Cruz, 2010

Resume coming soon

Nora  E.  Grant

Ecologist/Administrative Assistant

  • AS,  Landscape  Hor6culture, Cabrillo  College,  2013-­‐current
  • MS,  Marine  Science, CSUMMB/Moss Landing Marine  Labs,  2009
  • BS,  Marine  Biology, UC  Santa  Cruz,  2001

Resume coming soon