(425) 681-3130       mark@greenbankservices.com

Our Team

Greenbank was created in February of 2004 by Kenneth Philp, principal of Kenneth Philp Landscape Architects. The goal of our experienced, knowledgeable landscape construction and maintenance staff is to provide care that upholds the integrity of high quality and detailed gardens and landscapes. We work with clients, builders and designers throughout the greater Seattle and Eastside areas.

Mark Kihlstrom

General Manager

Mark has been in the construction business for 22 years specializing in high-end residential landscape construction. He has worked as both an arborist and horticulturalist and has experience procuring plants, sourcing exotic plant material, and propagating plants. Mark has managed landscape construction projects from a small front yard re-do to 12 acre estates. Mark’s expertise includes all facets of landscape construction including earthwork, drainage, masonry, carpentry, irrigation, low-voltage lighting, planting design, transplanting large trees, and installation of pools, spas, ponds, and water features. Mark lives in Kenmore.

John Holland


John is a Washington native who has enjoyed travelling throughout the world, an opportunity his father’s work afforded him. His travels brought him to Washington, D.C. for junior high school and Frankfurt, Germany for high school. After graduating from Augsburg College in Minneapolis, John followed his passion for landscape and plants working in wholesale nursery management. After several years, he joined the Peace Corps and worked for two years in Kenya as an agro-forestry extension agent. When John completed his Peace Corp term, he travelled through several other African countries and discovered just how remote Timbuktu really is. Upon his return to Seattle, John returned to nursery management where he expanded his work into landscape construction. John now has over 25 years experience working in both commercial and residential landscape construction.

Samantha Idle

Maintenance Supervisor & Color Planting Specialist

Samantha Idle holds an Associate’s Degree in Landscape Contracting from the State University of New York at Delhi. She is also a certified Organic Lawn Care Accredited Professional (OLCAP). She was born and raised on Long Island, NY, but has lived in Washington since 1998. Samantha has been working in the landscaping industry for over 30 years and has been with Greenbank since its inception in 2004. She began her career as a teenager in her family’s landscaping business and as a designer in the family flower shop. With Samantha’s many years of experience and as a former arborist, she has a broad knowledge of proper pruning techniques, lawn maintenance and restoration, and perennial and shrub care. Her passion and specialty is designing and installing seasonal color plantings that provide year-round interest. Samantha resides with her husband and their three children on their acreage in the outskirts of Monroe.

Rick Silva


Rick is a site contractor with extensive experience in commercial site excavation, site grading, underground utilities including storm, sewer, water systems, and equipment operation. Rick has supervised and managed site work projects for over 18 years in California, Hawaii, and Washington states. Projects have included federal and state jobs, as well as large-scale residential developments, ranches, and commercial installations.

Marcy Ghan


Marcy, like John, joined the Peace Corps as an agro-forester extensionist, living in Paraguay for two and a half years. After a career in forestry she switched her focus to accounting. At Greenbank she has paired her position with her passion for landscaping.

Aaron Skinner

Project Manager / Estimator

Aaron has over 20 years’ experience building and maintaining some of the world’s finest gardens. Originally trained in organic agriculture, Aaron moved to the landscape industry through his bonsai training. He has studied garden history, horticulture, and sustainable land use practices extensively in all areas of the US, Europe, Australia, Central America and Japan. He was previously Head Gardener at Seattle Chinese Garden, and has worked on numerous high profile, high quality residential, commercial, and public works projects. His specialties include irrigation, stone work, specimen tree pruning, and helping your residential project run smoothly. A devoted Seattleite, Aaron lives in West Seattle where he is
an active member of the community.

Leonardo Tamayo


An all-around great guy.