Western Chapter International Society of Arboriculture

What Western Chapter International Society of Arboriculture does

The Western Chapter International Society of Arboriculture (WCISA) is a nonprofit professional membership association founded in 1934 and headquartered at 31910 Country Club Drive, Porterville, California. It operates as the largest of the International Society of Arboriculture's (ISA) component chapters, serving more than 4,000 members engaged in the practice of arboriculture across four western U.S. states: Arizona, California, Hawaii, and Nevada. WCISA's mission is to promote and improve the practice of arboriculture through professional development, certification, education, and industry events.

WCISA's core offering is a portfolio of ISA-aligned certifications and qualifications — including ISA Certified Arborist, Certified Tree Climber, Board Certified Master Arborist, Tree Risk Assessment Qualification (TRAQ), Plant Appraisal Qualification, and Prescription Pruning Qualification (PPQ) — supported by continuing education units delivered through workshops, regional meetings, webinars (e.g., First Wednesday Webinars, Wetland Adaptations webinar), and the annual WCISA Connect conference. The chapter also hosts Tree Climbing Championships, publishes the Western Arborist magazine for members, and operates sub-programs such as Women in Arboriculture, the Arboleros Spanish-language committee, Tree Care for Birds, and student/internship pathways. Specialized co-developed courses include the Chiricahua Trees Course (a week-long, 30-CEU field program with the University of Arizona, University of California, and the American Museum of Natural History) and Cone Camp training delivered under the CA Reforestation Pipeline Partnership with American Forests, USFS Region 5, and CAL FIRE.

WCISA generates revenue through a multi-stream model: recurring annual membership dues from individual arborists and tree care professionals; one-time fees for certification courses (e.g., $675 member / $800 non-member for TRAQ 3.0), seminars (e.g., $65 Summer Sizzle), workshops ($165 for non-members), and field courses ($900 for the Chiricahua Trees Course); certification exam fees; and ancillary merchandise sales via an online storefront. Pricing is tiered by member vs. non-member status. Distribution is primarily self-serve through the wcisa.net website and members-only portal, supplemented by on-site event registration across the four-state territory.

Name

Western Chapter International Society of Arboriculture

Legal name

Western Chapter International Society of Arboriculture

Website

https://wcisa.net

Company type

Private

Founded year

1934

Operating status

Operating

Headcount range

11–50 employees

Short description

Nonprofit professional membership association founded in 1934 that serves over 4,000 arborists and tree care professionals across Arizona, California, Hawaii, and Nevada through ISA-aligned certifications, continuing education, annual conferences, publications, and tree climbing championships.

Ownership category

akta.pro rank

Product category

Professional Association & Certification Services

NAICS

Professional Organizations (81392), Professional Organizations (813920), Business, Professional, Labor, Political, and Similar Organizations (8139), Religious, Grantmaking, Civic, Professional, and Similar Organizations (813)

SIC

Services-Membership Organizations (8600)

akta.pro industry

PRIMARYIMAIAIAB

Tree Care & Arborist Services

Industrials, Manufacturing & Construction/Industrial Services & Facility Operations/Landscaping, Groundskeeping & Snow Removal

SECONDARYBPABADAD

Tree Care & Arborist Services

Business & Public Services/Facilities Management & Building Services/Landscaping & Grounds Maintenance

SECONDARYEDAOAOAJ

Forestry, Arboriculture & Silviculture

Education/Vocational, Technical & Trade Education/Agriculture, Horticulture & Skilled Trades

Keywords

• Arboriculture certification programs
• Tree care education
• Professional membership association
• Continuing education units
• Urban forestry training

Headquarters

HQ city

Porterville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Membership Dues: Annual membership fees for arborists and tree care professionals in Arizona, California, Hawaii, and Nevada.
2. Event and Conference Registration: Fees for annual conferences, regional meetings, workshops, and certification courses (such as TRAQ 3.0), both in-person and online.
3. Certifications: Fees for ISA certifications including Certified Arborist, Certified Tree Worker, Board Certified Master Arborist, and other qualifications.
4. Merchandise Sales: Sale of merchandise through the WCISA merchandise store.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

WCISA is a nonprofit professional association that delivers ISA-aligned certification programs (Certified Arborist, Certified Tree Climber, TRAQ, BCMA, PPQ, Plant Appraisal Qualification), continuing education units (CEUs), and industry events (regional meetings, the annual WCISA Connect conference, the Tree Climbing Championships, and specialty courses such as the Chiricahua Trees Course) to professional arborists and tree-care practitioners in Arizona, California, Hawaii, and Nevada. Members also receive the Western Arborist magazine and access member benefits through an online portal.

Product overview

The Western Chapter International Society of Arboriculture (WCISA) offers a portfolio of professional certification programs, educational courses, and industry events for arborists and tree care professionals across Arizona, California, Hawaii, and Nevada. The core offerings include ISA certifications (Certified Arborist, Certified Tree Climber, TRAQ, BCMA), continuing education units (CEUs), and professional development through regional meetings and the annual WCISA Connect conference. The chapter also publishes the Western Arborist magazine and hosts the Tree Climbing Championships. These products serve the professional development and certification needs of over 4,000 members engaged in arboricultural practice.

Differentiator

Problem solved

Functional benefit

Brands

• Women in Arboriculture: A committee under WCISA focused on supporting women in the arboriculture industry.
• Arboleros - Spanish Committee
• Western Arborist
• Tree Care for Birds

Products and services

• WCISA Membership Annual membership program for practicing and aspiring arborists, tree climbers, municipal arborists, students, and researchers in Arizona, California, Hawaii, and Nevada. Members receive discounted event and certification rates, access to the Western Arborist magazine, CEU tracking, and member-only portal features.
• ISA Certified Arborist Certification Professional credential demonstrating competency in arboricultural practices, tree care, and tree management for arborists practicing in the western U.S.
• ISA Certified Tree Climber Certification Credential for tree workers who specialize in climbing operations and safe climbing techniques, supporting career advancement and OSHA-aligned safety practices.
• ISA Tree Risk Assessment Qualification (TRAQ) Multi-day qualification course and exam that trains arborists in tree risk assessment methodologies with both written and field components; widely adopted by municipalities and utility vegetation programs.
• Board Certified Master Arborist (BCMA) Advanced master-level credential for experienced arborists that the WCISA chapter was instrumental in developing and that is delivered to qualified members through ISA.
• Prescription Pruning Qualification (PPQ) Specialized qualification for arborists in prescription pruning techniques, co-developed with the Florida Chapter and delivered through WCISA-hosted courses for tree care professionals.
• Plant Appraisal Qualification Training and qualification program for professionals in tree and plant valuation techniques, used by consultants, attorneys, and insurance adjusters.
• Continuing Education Units (CEUs) Ongoing professional development credits required to maintain ISA certifications, delivered through workshops, seminars, webinars, regional meetings, and approved alternative education activities.
• WCISA Connect Annual Conference The chapter's premier annual educational conference featuring industry experts, workshops, vendor exhibits, and networking opportunities for arboriculture professionals in the western U.S.
• Tree Climbing Championships Competitive tree climbing event showcasing professional climbing techniques and skills within the arboriculture industry, including novice, intermediate, and masters divisions.
• Regional Meetings Local educational meetings held throughout Arizona, California, Hawaii, and Nevada providing CEUs, technical talks, and professional development opportunities for arborists in their local markets.
• Chiricahua Trees Course Week-long intensive field biology course focused on the ecology, field biology, and utilization of desert-adapted trees, offering 30 CEUs for certified arborists; co-sponsored with the University of Arizona, University of California, and the American Museum of Natural History.
• Western Arborist Magazine The chapter's official membership publication covering industry news, technical articles, member profiles, and chapter activities, distributed regularly to WCISA members.
• Student Programs Special membership category and programs for students pursuing careers in arboriculture, including discounted student membership, internship opportunities, and academic engagement.
• WCISA Merchandise Store Own online storefront selling WCISA-branded apparel, accessories, and other merchandise to members, supporters, and the arboriculture community.

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Ten partnerships are on record, tiered core and minor.

• University of ArizonacoreStrategic or Co-development PartnerCo-sponsor of the Chiricahua Trees Course with the University of California in conjunction with the American Museum of Natural History. The course provides introduction to ecology, field biology, and utilization of desert adapted trees.
• University of CaliforniacoreStrategic or Co-development PartnerCo-sponsor of the Chiricahua Trees Course with the University of Arizona in conjunction with the American Museum of Natural History.
• American Museum of Natural History (Southwestern Research Station)coreStrategic or Co-development PartnerPartners with WCISA and universities to host the annual Chiricahua Trees Course at the Southwestern Research Station in Portal, AZ.
• American ForestscoreStrategic or Co-development PartnerPartner in creating Cone Camp training for cone collection and forest seed gathering. WCISA partners with American Forests, Region 5 USFS, and CAL FIRE as part of the CA Reforestation Pipeline Partnership.
• U.S. Forest Service (Region 5)coreStrategic or Co-development PartnerPartner with WCISA for Cone Camp training as part of the CA Reforestation Pipeline Partnership.
• CAL FIREcoreStrategic or Co-development PartnerPartner with WCISA for Cone Camp training as part of the CA Reforestation Pipeline Partnership.
• TREE FundminorOthersRelated charitable organization referenced on WCISA website for donations and support of tree research and education.
• The Britton FundminorOthersRelated charitable organization referenced on WCISA website supporting research and education in arboriculture.
• TreePeopleminorStrategic or Co-development PartnerEnvironmental organization hosting events that WCISA leadership participates in, such as the Simon Sinek speaking event at TreePeople's S. Mark Taper Foundation Amphitheatre.
• Arizona Community Tree Council (ACTC)minorChannel Partner/ Reseller/ DistributorWCISA collaborates with ACTC on the ACTC 2 Day Annual Conference in Prescott, AZ, promoting shared educational opportunities for arborists in the region.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Society of Municipal Arborists (SMA): Professional organization for municipal and utility arborists, delivering conferences, publications, and credentials. Overlaps with WCISA's municipal arborist segment and shares the professional association + certification model.
• Arbor Day Foundation: Large national nonprofit focused on tree planting and stewardship education. While not a credentialing body, it shares WCISA's audience of tree-care-interested individuals and pursues overlapping public-engagement and education programming.
• Tree Care Industry Association (TCIA): National trade association for commercial tree care companies, offering accreditation (TCIA Accreditation), safety training, and business resources. Targets a different but overlapping audience (employers vs. individual practitioners) within the same arboriculture ecosystem.
• International Society of Arboriculture (ISA): The parent professional society of which WCISA is a regional chapter. ISA administers the core certification programs (Certified Arborist, TRAQ, BCMA) that WCISA delivers regionally, and is the closest direct comparable in mission, certification portfolio, and member base.

Others

• Pacific Southwest Region 5 — U.S. Forest Service: Federal partner of WCISA in the CA Reforestation Pipeline Partnership. Comparable only as a stakeholder and program partner rather than a peer organization, but exercises significant influence over regional workforce demand.
• TREE Fund: Charitable organization supporting tree research and education, explicitly linked to WCISA on its website. Acts as a complementary funding mechanism rather than a competing membership body.

Regional players

• Arizona Community Tree Council (ACTC): Arizona-based nonprofit that co-hosts the annual ACTC conference with WCISA. Operates a smaller, state-scoped version of WCISA's education and member-driven model within the same chapter territory.

Direct peers

• Texas Chapter ISA: Another large ISA regional chapter serving Texas arborists with certifications, conferences, and CEU programming. Closely comparable operating model to WCISA, differing only by single-state vs. multi-state territory.
• Florida Chapter ISA: Sister regional chapter of ISA that co-developed the Prescription Pruning Qualification with WCISA. Operates the same chapter-level member/certification/event model in a different U.S. region, making it the most structurally comparable peer.

Emerging players

• American Forests: National conservation organization that partners with WCISA on the CA Reforestation Pipeline Partnership and Cone Camp. Operates adjacent workforce and reforestation programs that complement WCISA's certification offerings.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/sharer/sharer.php?u=https%3A%2F%2Fwcisa.net%2Fmeeting%2F11246
• Xx.com/wcisa

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Western Chapter International Society of Arboriculture