Meet the QTC Team

Sue Koster

Sue grew up in Orange County, CA with a love for the horseback riding and participated in equestrian competitions. When she moved to Santa Barbara in 1979, she started working for a local property management company, and after several years became a Property Manger.  There she developed business and managerial skills which prepared her for being a small business owner. Sue and Ken met in 1991, when Sue called Quality Tree Care to take care of an emergency down tree for one of the properties she managed. A year later they married and Sue began working with Ken and his company QTC. She quickly became an essential part of the team by managing the business and allowing it to expand into what it has become today. In her spare time, Sue enjoys cooking, traveling and spoiling her grandchildren.

Amanda Hilton

Amanda is a 4th generation Santa Barbarian. Having grown up with her father, Ken’s, chainsaws and climbing rope at her feet, there became a natural love of caring for trees and the outdoors. After graduating high school in 2004, she began working for a local tree company. Several years later she joined the Quality Tree Care and Landscaping team. She eventually took over QTC’s Tree Devision when Ken expanded the company into offering landscaping services. Amanda is now is one of the main forces keeping QTC moving forward in a professional and accommodating manner. When she is not working, Amanda enjoys snowboarding, gardening and taking her dog, Bru, to the beach.

Zoey Lee

Zoey was born and raised in Santa Barbara, CA. Having grown up watching her father, Ken, design beautiful landscapes, she grew to have an eye for design. She developed a love for the outdoors and the arts and was a part of a local dance company for 5 years. Once she graduated high school in 2011, she began her professional career in hospitality, working as a Sales and Event Manager, and in Social Media Management. After getting married in 2018, Zoey and her husband road tripped across the nation, camping at over 50 national parks. They soon settled in Seattle, WA. When their daughter was born in 2019, they decided to move back to Santa Barbara to be close to family. Zoey now manages the office and social media for Quality Tree Care and Landscaping. In he spare time, she enjoys camping with her children, doing yoga and taking her dog on hikes.


Ethan Koster

Ethan was born and raise in Santa Barbara, CA. Growing up he began racing motocross and traveling the nation competing in races with his dad, Ken. Throughout those years of competing he developed a love for travel, nature, sports and photography. Ethan evolved his passion for the arts into music and videography, playing the drums in a band for 6 years and filming music videos for local musicians. In 2016 Ethan graduated from high school and began working with Quality Tree Care. Having started operating equipment in his dad’s lap at 8 years old, Ethan now manages and maintains our entire fleet. Ethan is also an essential part of managing the Landscape Devision, by using his creative eye and onsite experience.

Ramon Meza-Silva

Starting out as our Lead Landscape Foreman, Ramon has since become a manager and business partner here at Quality Tree Care. With over 20 years experience, we rely on Ramon to lead our team to success and safety when working on major hardscape projects as well as managing multiple landscape crews. Ramon grew up in Nayarit and has lived in Goleta for most of his life with his wife and two daughters. His passion for design and landscape began when he was a child and has flourished throughout his adult life, growing within QTC and leading him to gain his Irrigation Tech Certification.

Rodolfo Ramirez

Rodalfo grew up in Nayarit and moved to Santa Barbara when he was 18. He began working with a local tree company and a few years later was hired within the Quality Tree Care team. 25 years later, his dedication and passion has lead him to move up within the company and become our Lead Tree Care Foreman. Rodalfo is a true artist and craftsman within the tree care industry, and an asset within our team.


QTC in the Press

In Loving Memory of

our Founder, Ken Koster

Ken attended and graduated from Santa Barbara High School in 1982, and received his AA after. In 1984 he moved to Oahu, Hawaii and worked in event planning. Soon after he returned to Santa Barbara to start his grassroots tree company, Quality Tree Care. In 1992, Ken married his wife Sue and together they grew the company. Being the 3rd oldest licensed tree company in Santa Barbara, they ultimately bought a 4-acre tropical nursery together which has been home to their family and Quality Tree Care for the past 21 years. There he focused on cultivating rare tropicals and palm trees, always making sure that his nursery was ever growing. Ken’s creativity led him to diversify his business to include full service landscaping. He was very well respected by the community for his love and knowledge of trees. Now 38 years in the business Ken’s vision of being able to pass his legacy down to his family has come true. For the past 18 years Ken had been mentoring his daughter Amanda, teaching her all aspects of the tree business. Taking these experiences with her, she now manages the tree division, while Ken managed the landscape division. Ken received the ‘Santa Barbara Beautiful Award’ in 2019 for his outstanding landscape achievements. In 2020, Quality Tree Care was truly made into a family owned and operated business when his daughter Zoey and son Ethan joined the team. Lead by Ken’s unstoppable ambition, they run the company together today. Ken was a bright man with a huge heart. Nick-named ‘Boo,’ he loved his amazing wife Sue, three children Amanda, Zoey, Ethan, his son-in-law Mitch and beautiful granddaughter Frances Penelope, who was named after his mother Penny. Ken loved rock climbing, motocross, skiing, outrigger canoeing, his many friends and tending to his nursery. Ken’s spirit lives on in the trees and ground beneath our feet, and he will be forever missed.

1964 - 2021