Finding a Certified Arborist in Tyler and Longview

Arborist or tree service: what is the difference?

An arborist diagnoses and advises; a tree service cuts. The International Society of Arboriculture (ISA) describes an arborist as a trained professional who can decide whether a tree should be pruned, treated, braced or removed, and who may also offer tree risk assessment, consulting and tree protection during construction.

A tree service is the business that shows up with saws, a chipper and sometimes a crane. The two often overlap: plenty of tree companies employ an ISA Certified Arborist, and some arborists run their own crews. Others work only as consultants and never cut, which keeps their advice separate from the sale.

For a simple job, like a small dead tree in the open, a reputable tree removal company is usually enough. Whether a tree needs to come down at all is arborist territory.

What the ISA Certified Arborist credential means

An ISA Certified Arborist has passed a standard exam and keeps up with continuing education. According to ISA’s Certified Arborist program guide:

• Experience first. Candidates need at least three years of full-time arboriculture work, or a qualifying degree or training program plus one to two years of experience.
• A 200-question exam covering 10 areas, including tree biology, pruning, diagnosis and treatment, trees and construction, tree risk, and safe work practices.
• A code of ethics that every holder must accept, and agree to again at each renewal.
• Renewal every three years. The credential is valid for three years. To keep it, the arborist earns at least 30 continuing education units in that period or retakes the exam.
• Accredited process. ISA is accredited under the ISO/IEC 17024 standard for certification bodies.

What it does not mean matters just as much. ISA states that certification shows a fundamental level of knowledge and that “no other conclusions may be drawn.” It is not a license, not a guarantee of workmanship, and not proof of insurance. The credential belongs to a person, not a company, so a company “with a certified arborist” may not send that person to your yard.

How to check an arborist’s credential

You can verify an ISA credential yourself for free, and it takes a couple of minutes. ISA’s older brochures point to a “Verify a Credential” tool on TreesAreGood.org. In 2026 ISA replaced that tool and the old Find an Arborist search with a single Find an Arborist directory, according to its directory FAQ.

1. Ask for the full name and ISA certification number. A real certified arborist will have both and will not mind the question.
2. Open the directory at certificates.directory.isa-arbor.com, which is also linked from TreesAreGood.org.
3. Search by name or certification number, not only by location. Listing a city is optional, so many Tyler and Longview arborists will not show up in a map search even though their credential is valid.
4. Check the credential type and status. Make sure it says Certified Arborist (or the credential they claimed) and that it is current, not expired.
5. Match it to the person who will do or supervise your work, and ask who will actually be on site.

If you cannot find someone, that does not prove they lied, because holders can hide their profile. ISA can confirm status directly; its directory FAQ lists isa@isa-arbor.com and +1 678 367 0981.

Other credentials you may see

Beyond the basic certification, a few other titles show up on East Texas trucks and estimates. Here is what each one is, from the issuing organization:

Credential	Who issues it	What it tells you
Board Certified Master Arborist	ISA	ISA’s highest certification. Requires an active Certified Arborist credential; fewer than 2% of Certified Arborists hold it.
Tree Risk Assessment Qualification (TRAQ)	ISA	Training and testing in tree risk assessment. Holders retrain and retest every seven years. Useful when you need a written risk rating.
Certified Arborist Utility Specialist	ISA	Certification focused on tree work around power lines.
Registered Consulting Arborist (RCA)	American Society of Consulting Arborists (ASCA)	ASCA’s premier membership level for consulting arborists, the people who give advice and write reports on trees.
Commercial pesticide applicator license	Texas Department of Agriculture	A state license. Required for anyone who applies any pesticide to trees for hire in Texas.

Does Texas license arborists?

Not as far as we can find. There is no general Texas state license we could locate for arborists or for tree trimming and removal, and ISA’s program guide says its certifications “do not represent licensure.” Some states do license tree work (Alabama, for example, requires a tree surgery license), so advice written for other states may not apply here.

The license that does matter in Texas is for chemicals. The Texas Department of Agriculture says anyone who applies any pesticide, including general-use products, to trees, lawns or ornamental plants for hire must be licensed by TDA. If someone offers to spray, inject or treat a tree for insects or disease, ask for that license number.

City rules can also apply. Tyler, for example, requires a Clearing and Grading Permit before clearing, grading or predevelopment clearing in city limits, and on an undeveloped site healthy trees 6 inches or more in diameter cannot come down without one; see our Tyler page for details and check with the city before work starts.

When it is worth calling an arborist first

Pay for an arborist’s opinion when the decision is expensive, hard to undo, or may need to be defended to someone else. Texas A&M Forest Service notes that a tree owner is generally liable for damage when a tree on their land falls, and it recommends inspections by a certified arborist after storms, drought or insect damage.

• A big tree close to the house. A large oak or pine leaning over a roof, with cracks, dead limbs, mushrooms at the base or a new lean after a storm.
• You are not sure it has to come down. An arborist may suggest pruning, cabling or simply watching it instead of a removal you cannot take back.
• Permits and construction. Tree protection plans, permit paperwork in cities like Tyler, or keeping a tree alive while you build or trench near it.
• Insurance or neighbor questions. A written report on a tree’s condition can help when a claim or a dispute depends on whether a tree was already dead or dangerous. Our guide to a neighbor’s tree falling on your property covers who usually pays.
• Disease or insects. Browning needles in pines, thinning oak crowns, or anything that might need treatment rather than a saw.

If a tree is already on your house or blocking your driveway, you need a crew now, not a report. Request a call back and we’ll get emergency tree removal handled.

What an arborist visit costs

Most arborists charge for a consultation separately from any work, usually by the visit or by the hour. These are national figures from HomeGuide’s arborist cost guide (retrieved September 2026); prices in Tyler and Longview may be higher or lower.

Service	Typical national cost
Tree inspection or risk assessment	$100 to $250
Consultation and written report, one tree	$150 to $450
Consultation and report, several trees	$300 to $700
Construction report	$400 to $1,000
Hourly rate	$100 to $250 per hour

Some tree companies give a free look at a tree as part of a removal or trimming estimate. That can be fine for a straightforward job, but it is a sales visit, not an independent opinion. For removal and trimming prices, see the tree removal cost guide.

Arborist, tree service or utility crew?

The right call depends on what the tree is doing and where it is. Use this table as a rough guide.

	Arborist (consulting or on staff)	Tree service company	Utility line clearance crew
Main job	Diagnose, assess risk, recommend, write reports	Remove, trim, grind stumps, clean up	Keep trees clear of power lines
Who pays	You	You	The utility, for its own lines
Call them when	You need a decision or documentation	You know what work you want done	A tree or limb is on or near a power line
What to verify	ISA number in the directory, TRAQ if you need a risk rating	Liability insurance, written estimate, any credential they claim	Nothing; call the utility’s own number

Tree work within 10 feet of lines carrying 50 kilovolts or less counts as line-clearance tree trimming under OSHA rules, with its own training requirements. Utilities in the area run their own programs: SWEPCO maintains rights of way with tree trimming (our Longview page covers SWEPCO line safety), and Oncor says its vegetation crews include certified arborists. Never let a general crew, or yourself, work near a live line.

Questions to ask before you hire

Good arborists and tree companies expect questions. ISA’s consumer brochure recommends checking credentials and insurance, getting more than one estimate and getting the work in writing.

1. What is your ISA certification number, and will you be on site?
2. Do you hold TRAQ, and can you give me a written risk assessment?
3. Can I see your certificate of liability insurance? (ISA suggests calling the insurer to confirm it.)
4. Will you put the scope of work, cleanup and price in a written contract?
5. Do you prune to industry standards, and do you avoid topping? (ISA calls topping “perhaps the most harmful tree pruning practice known”.)
6. Do you climb with spikes on trees you are only pruning?
7. Does this tree need a city permit, and who gets it?
8. If you recommend treatment, what is your TDA pesticide license number?

Be wary of anyone who knocks on doors after a storm offering a bargain, which ISA specifically warns against, and never pay the full price up front.

Free help and reference sources

You can get a lot of general guidance without paying anyone. These sources are run by public agencies or the ISA itself:

• Texas A&M Forest Service publishes tree care guidance, including its page on hazardous trees and liability.
• Texas A&M AgriLife Extension has county offices in Smith County and Gregg County with horticulture programs and Master Gardener volunteers.
• ISA Texas Chapter keeps a Find an Arborist in Texas page for tree owners.

How this site fits in

When you reach out, we’ll help you get the job handled in the Tyler and Longview area. We do not employ arborists ourselves, and we cannot promise the crew that does the work holds an ISA credential. If certification matters for your job, ask the crew for the arborist’s name and number and check it in ISA’s directory yourself before you agree to any work.