ABOUT US

Callahan Landscape is a family owned and operated business based in Sonoma County, CA. It is owned and managed by 2 siblings: Erin + Christopher Callahan and supported by an amazing crew of personnel that make up the construction and maintenance teams. The Callahans are 4th generation Californians from a long line of gardeners, designers, farmers, and agricultural workers. They were bound to share their years of experience and love of all things plants and agriculture with the world eventually. Follow along with our journey on Instagram at @callahanlandscape.

  • Title: President

  • Favorite Flower: Passiflora 'Amethyst'

  • Favorite Game: Sudoku

  • Favorite Drink: Rye Whiskey

  • Credentials: ISA Certified Arborist, DPR Qualified Applicator

  • Alma Mater: Cal Poly, San Luis Obispo

Christopher Callahan

  • Title: Business Developer

  • Favorite Plant: Monstera Deliciosa

  • Favorite Drink: Natural Wines + Ciders

  • Favorite Garden: Mom + Dad’s

  • Favorite Weekend Activity: Art + Music Events

  • Alma Mater: Sonoma State University

Erin Callahan

Justin Van Horne

  • Title: Tree Consultant

  • Favorite Plant: Butterfly Pea

  • Favorite Pastime: Spearfishing & Foraging

  • Credentials: Professor of Horticulture, ISA Certified Arborist, Dive Instructor

  • Alma Mater: Murray State University

John Manalo

  • Title: Office Manager

  • Favorite Plant: Bougainvillea

  • Favorite Pastime: Landscape Photography

  • Languages Spoken: English, Tagalog, German

  • Alma Mater: Sonoma State University

Marshall & Sullivan

  • Title: Stress Management + Asst. Excavators

  • Favorite Treat: Avocado + Bacon

  • Favorite part of Landscaping: Saying hi to coworkers everyday

  • Instagram: @marshall_and_sullivan

Field Personnel

  • Construction

  • Maintenance

  • Irrigation + Water Management

  • Vegetation Management