Arborists who have been in the field for a number of years often choose to become consultants. This is a special area of arboriculture.
The body responsible for certification of a Consulting Arborist (giving the RCA or Registered Consulting Arborist) is the ASCA(American Society of Consulting Arborists). An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants.
An informal term is ‘tree surgeon’. Arborists generally focus on the health and safety of individual plants and trees, rather than managing forests (the domains of Forestry and Silviculture) or harvesting wood. An arborist’s scope of work is therefore distinct from that of either a forester or a logger, though the professions share much in common. Tree Risk Assessor: a recent certification, and one driven by accidents in the industry. This is now required by law in a few areas but recommended anywhere.
Certified Tree Risk Assessor: a credential introduced in 2005 and administered by the Pacific Northwest Chapter of the ISA. TRACE (Tree Risk Assessment Course and Exam) was designed and implemented by Julian Dunster, in British Columbia, Canada. Sponsored and accredited by WorkSafe BC it was eventually taught across North America and in Hong Kong. There were about 1700 people accredited.
Tree Risk Assessment Qualified credential (TRAQ) designed by the International Society of Arboriculture was launched in 2013. At that time people holding the TRACE credential were transferred over to the TRAQ credential.
′′′As well In Canada′′′ a Arborist will find that there are provincially governed apprenticeship program, ones that would allow arborists’ upon completion to work near the energized\ conductors. These apprenticeship program have to meet the provincial regulations (for example in BC WorkSafeBC G19.30).Then the individual must meet the requirements of the owner of the power system.
Source: Wikipedia http://en.wikipedia.org/wiki/Arborist