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How Do You Show ISA Certified Arborist Status on Your Tree Service Website?
Short answer: A tree service should name the person who holds the ISA credential, say which one it is, and show it where homeowners decide: the top of the home page, service pages, about page and footer. Link to ISA's directory. Write "our crew leader is an ISA Certified Arborist," not "we are certified."
- The ISA credential is voluntary and held by a person, not by a company.
- It is not a state license, so show any state or city license separately.
- ISA's Find an Arborist directory offers credential verification, and listings are voluntary.
- ISA certification runs on a three-year recertification cycle, so take the claim down if it lapses.
- Connecticut requires a state commercial arborist license to advertise or contract tree work for hire.
- Put the claim in page text, since search engines and AI tools read text, not badge images.
An ISA Certified Arborist is a tree care worker who holds a credential from the International Society of Arboriculture, which offers the credential and keeps a public directory of credential holders. The credential is not a state license. It is a voluntary sign of training that you can prove, and homeowners often search for it by name.
This guide shows what to put on the page, what to leave off, and how to keep every claim true.
Is an ISA certification the same as a license?
No. These are two different things, and mixing them up on your site can cause trouble.
| ISA certification | State or local license | |
|---|---|---|
| Who gives it | International Society of Arboriculture | A state board, state agency or city |
| Is it required to do tree work? | No, it is voluntary | Depends on your state or town |
| Who holds it | A person | Often the business, sometimes a person |
| How a customer checks it | ISA's public directory | The licensing agency's lookup |
ISA's directory page says it encourages hiring firms that employ ISA-certified staff, and that credential holders are expected to follow its ethics code (Trees Are Good: Find an Arborist). That is a strong thing to point to. But in many states you also need a license, a registration or insurance before you can legally run a tree business. See our guide on tree service licensing and insurance for how to show those.
Some states go further than others. Connecticut, for example, requires anyone who advertises or contracts to do tree work for hire on fruit, shade or ornamental trees to hold a state commercial arborist license, with no mention of ISA certification on the page (Connecticut DEEP: Commercial Arborist License). Do not write "licensed arborist" on your site because you have an ISA credential. Say "ISA Certified Arborist," and show a state license separately if you have one.
Which ISA credentials can you show?
ISA lists several credentials on its site. The ones tree companies mention most are:
- ISA Certified Arborist
- ISA Tree Risk Assessment Qualification (TRAQ)
- ISA Board Certified Master Arborist (BCMA)
ISA's credentials page lists these and treats certifications and qualifications as different kinds of credential (ISA: Types of Credentials).
Use the exact name. "ISA Certified Arborist" and "TRAQ" mean different things, and a homeowner who reads the ISA page will see the difference.
ISA's own certification pages say certification includes recertification requirements, with a three-year cycle, and that continuing education units do not roll over to the next cycle (ISA: Common Questions). That matters for your website. A credential can lapse. If the holder stops renewing, take the claim down.
What to put on the page, step by step
Here is the plan, in the order that helps the most. The names in the examples are made up.
1. Name the person and the credential
Write it the way you would say it to a customer:
Mike Alvarez, our crew leader, is an ISA Certified Arborist.
Add the credential for each person who holds one. If you have two certified people, name both. If you have one, do not say "our certified arborists."
2. Put it near the top of the home page
Most visitors read the first screen and decide. A short line under your main heading works well:
Tree removal and trimming in Fort Collins. Work led by an ISA Certified Arborist.
Use a real town where you work in place of the example. A small badge image is fine too, as long as the text says the same thing in plain words. Search engines and AI tools read text, not pictures, so a badge alone does not count.
3. Repeat it on the pages where the decision happens
Add one sentence to the pages people read when they are about to call:
- Removal pages: who plans the cut and who is on site.
- Pruning and trimming pages: who decides how much to take off a tree.
- Tree health and risk pages: if you have a TRAQ-qualified person, say so here, since that is the page about whether a tree is dangerous.
- Emergency pages: who shows up after a storm.
Keep each mention short. Do not paste the same paragraph on every page.
4. Give the credential a home on your about page
A short about page works better than a long one. Include:
- A photo of the person, in work clothes, in a yard.
- Their name, credential and how many years they have worked with trees.
- One or two sentences on why they got certified.
- A link to check the credential.
"Years of experience" must be true. If you are not sure of the number, leave it out.
5. Link to the ISA directory
ISA's Find an Arborist directory describes itself as offering up-to-date credential verification, and listings are voluntary (Trees Are Good: Find an Arborist). If the holder has a listing, link to it, or tell people to search the person's name. Do this, and the claim stops being just words on your page. It gives you the same thing a good reference gives you, which is a way for a stranger to check.
If the holder chose not to have a listing, ask them to add one, or show the digital badge and certificate ISA offers credential holders (ISA: credential holders can showcase a digital badge and certificate). Before you copy an ISA logo from somewhere else, ask ISA what use is allowed.
6. Add it to your footer and your Google profile
Put one line in the footer of every page, next to your phone number and license. In your Google Business Profile, work it into your description and photos. A photo of the holder with a tree, with a caption that has the name and credential, does more than a stock image.
What to write, and what not to write
| Say this | Do not say this | Why |
|---|---|---|
| "Our crew leader, Mike, is an ISA Certified Arborist." | "We are an ISA certified company." | ISA credentials are held by individuals |
| "ISA Certified Arborist" | "Licensed arborist" | A license comes from a state or city |
| "Check his credential in ISA's directory." | "Fully certified and approved by ISA" | Do not imply ISA endorses your company |
| "Certified since 2019" (only if true) | "Certified" with no name or date | A vague claim cannot be checked |
| "TRAQ-qualified" (only if true) | "Tree risk expert" | Use the exact term |
If your crew has no certified person yet, do not fake it. Say what you do have: years in business, insurance, a license, or training. Then think about whether getting one person certified is worth it.
Does ISA certification help you get found online?
It can help in a few ways, but none of it is guaranteed.
Homeowners trust it. When someone is choosing between three companies, a named credential gives them a reason. It also gives you something to answer when a caller asks, "Are you certified?"
It gives AI tools a clear fact to quote. AI search tools pull answers from plain text. A sentence like "Mike Alvarez is an ISA Certified Arborist" is easy to quote. A badge picture is not. See our guide on getting your tree service on ChatGPT for the rest of what those tools look at, starting with reviews.
It supports the story in your reviews. Reviews carry the most weight with AI and with homeowners. A credential is a second source that agrees with them. If customers write "he explained why the tree needed to go," your page backs that up.
No study that we know of proves that showing a credential raises your ranking on its own. Treat it as a trust signal for the person reading, not a ranking trick. Our guide to tree service SEO covers what moves the needle on Google.
A quick check before you publish
Go down this list:
- Is the credential name exactly right?
- Does the page name the person who holds it?
- Is it still current? Ask them to check their account.
- Can a stranger verify it? Link the directory.
- Is the text on the page, not only in an image?
- Is the license line, if you have one, shown separately?
- Does the same claim appear on the about page, the home page and the footer without contradicting itself?
Common questions
Can a tree service company be ISA certified?
ISA frames its credentials as personal ones that an individual earns, not company ones. So write that a person on your team holds the credential. If you want a company-level badge, look at other programs, such as the accreditation offered by the Tree Care Industry Association, and read its own page before you claim it.
Do I need an ISA certification to run a tree service?
Not by ISA's rules. It is voluntary. Your state or town may still require a license, a registration or insurance, and those rules vary. The Minnesota Department of Agriculture, for instance, lists ISA Certified Arborists among optional credentials that signal training, and says they are not legal requirements (Minnesota Department of Agriculture: Checklist for Hiring a Tree Care Company).
Where is the best place to put the credential on my website?
Put it in the first screen of the home page, on every service page near your call button, on the about page and in the footer. Name the person each time.
What if my certified arborist leaves?
Take the claim down the same day. Update the home page, the about page, the footer, your Google profile and any social pages. An out-of-date credential is worse than none.
Can I use the ISA logo?
ISA says credential holders can share their accomplishment through a digital badge and certificate, but the page we checked does not address logo use. Ask ISA before you copy a logo into your design.
Make the credential easy to see
If you want the badge, the name and the directory link placed correctly on every page, you can see a free demo site built for tree services.
Sources
- ISA: Types of Credentials (2026)
- ISA: Credentials Common Questions (2026)
- ISA: Digital badges and use of credentials (2026)
- Trees Are Good (ISA): Find an Arborist (2026)
- Connecticut DEEP: Commercial Arborist License (2026)
- Minnesota Department of Agriculture: Checklist for Hiring a Tree Care Company (2026)
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