TreeSource: Arborist Tree Care

About Us - ISA Certified Arborists

Zeb Haney

Zeb Haney Seattle Arborist is a second generation arborist. Growing up around a landscaping company, he decided to have nothing to do with the green industry. However, those who have been bitten by the Tree bug can't stay away from trees for long. After rediscovering a love for trees in his late 20's he committed to a new career as an Arborist. Zeb actually sold a successful retail support service company to focus on the world of Arboriculture. Besides operating TreeSource, Inc. since 2004, Zeb is an instructor with Arboriculture Canada Training and Education (ACTE). "I believe that being actively involved with educating and supporting the tree care industry at a high level makes me a better Arborist," says Zeb. Zeb Haney is an ISA Board Certified Master Arborist, # PN-5840B and also holds certifications as a Tree Risk Assessor, Tree Climber, Faller Technician, and Rescue Technician. He is also involved in the International Tree Climbing Championships as a local judge and occasional competitor.


Douglas Smith

ISA Certified Arborist #PN-6116A, has been with TreeSource, Inc. since shortly after it was founded in 2004. Doug has an extensive background in Horticulture, making him an expert in tree identification. Doug also is a competitor in local tree climbing competitions. He is currently the lead climbing Arborist at TreeSource, Inc. You will frequently find him inspecting trees well over 100 feet in the air. One of the biggest contributions Doug has made to our company has been by steering us more into a more environmentally focused philosophy.


Michael HarrellMichael Harrell -Seattle Arborist

ISA Certified Arborist PN-6448A, Michael has eleven years of green industry experience, including wetland restoration, stream repair, native plant propagation, Pond construction, general landscape maintenance, and tree work. You'll always find Michael out doors doing something to help nature. Michael says working with trees is like nothing else he's every done. It challenges your mind and body at the same time. You live very much in the moment just you the tree and the task at hand.


Tom Otto

Tom Otto Seattle ArboristISA Certified Arborist PN-1982A, Tom Otto has been working with tree for the past 12 years.Tom is our resident pathologist and is currently finishing his BS degree from Evergreen State College with emphasis in Urban Forest Ecology. He frequently volunteers his time to help the Washington State DOE, installing and maintaining wildlife cameras throughout western Washington. Check out one of the Eagle cams at the following link: http://wdfw.wa.gov/wildwatch/ospreycam/index.html 

News and Media

  • Zeb Haney Earns Highest Professional Certification in Arboriculture

    Champaign, IL - Zebadiah J Haney of Federal Way, WA recently demonstrated professional competency by successfully completing the BOARD CERTIFIED MASTER ARBORIST examination administered through the International Society of Arboriculture (ISA) and the local Chapter of the ISA.

       The purpose of the ISA Certification Program is to improve the level of knoweledge and standard of practice within the tree care profession. It is designed to assist the public in identifying those professionals in arboriculture who have demonstrated, through a professionally developed examination and education program, an extensive knowledge of tree care practices. All Board Certified Master Arborists carry a wallet identification card for verification. Certification is valid for three years. The ISA program tests and certifies an individual's knowledge in the field of Arboriculture.

       The International Society of Arboriculture is a scientific and educational organization devoted to the dissemination of information in the care and preservation of shade and ornamental trees.

         ISA's Certification Program is designed to promote the professional development of those involved in the field of arboriculture or tree care. When contracting for your tree care needs, contact individuals who are certified through this voluntary program.

  • Researchers "X-Ray" a 300 Foot Tall Tree
    "Zeb Haney, president of TreeSource, Inc. will be leading a team of researchers and working arborists on an expedition to map the interior of a centuries old Douglas fir (Pseudotsuga menziesii). The team plans to use sound waves to show the wood density inside the trunk, from base to growing tip. This survey of wood density follows up an exterior mapping of the canopy of this tree that was completed in 2004."
  • Raising the Bar of Instruction "Just like many industries, competition is part of the game. But owners of two separate arborist training companies decided to put competition aside to pool their resources for the betterment of the arboriculture industry as a whole. The companies recently combined 460 years of industry experience to improve training methods while also finding ways to help reduce the ever-increasing rate of arborist fatalities."
  • Human squirrels go for it "A tree-climbing competition attracts professional arborists from throughout the Northwest to Tacoma. They pride themselves on safety – and fun. They crept on branches 50 feet in the air, dangled from ropes and worked the trees like they were squirrels."
  • High Climbing "The growl of chain saws interrupted the usual sleepy atmosphere of upper campus in June, as tree trimmers from Tree Resource shimmied up the 100-foot Douglas firs flanking the east side of Mary Baker Russell Music Center."