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Recognized Schools

The AIA is proud to present the schools listed here, as they have met the criteria for the following levels of training under AIA’s school recognition program. Completion of a minimum of the 200-hour Professional Level curriculum from an AIA recognized school will provide the educational requirement to sit for the Aromatherapy Registration Council’s registration examination.

Learn More About the School Recognition Program

Advanced Practitioner Level 3 Schools (Previously Clinical Level)

(minimum 400 hours of training)

    • American College of Healthcare Sciences (Oregon, USA)
    • Aromahead Institute, School of Essential Oil Studies (Montana, USA)
    • Aromatherapy Today Education (Queensland, Australia)
    • Aromatics Academy – Dr. Debrah Zepf LLC (Colorado, USA)
    • Eclipse Living Essence Aromatherapy Centre (Perth, West Australia)
    • Essence of Thyme College of Holistic Studies (British Columbia, Canada)
    • Holistic Care Professional School (Kobe, Japan)
    • International Aromatherapists Association (Seoul, Korea)
    • Shaktili Aromaterapia (Mexico City, Mexico)
    • Sun Son International Academy of Aromatherapy (Kaohsiung City, Taiwan)

Professional Level 2 Schools

(minimum 200 hours of training)

    • American College of Healthcare Sciences (Oregon, USA)
    • Aroma Apothecary Healing Arts Academy (Colorado, USA)
    • Aromahead Institute, School of Essential Oil Studies (Montana, USA)
    • Essence of Thyme College of Holistic Studies (British Columbia, Canada)

Foundation Level 1 School

(minimum 100 hours of training)

    • New York Institute of Aromatherapy (New York, USA)

American College of Healthcare Sciences (Level 2 & 3)

President: Tracey Abell

Portland & Hawaii, USA


We Offer Accredited Online Degree and Certificate Programs in Holistic Health.

ACHS programs are among the few accredited programs in integrative health and wellness available in the U.S.

We offer programs perfect for anyone at any step of their education and career journey. Earn a Certificate in Aromatherapy and add this powerful healing modality to your arsenal of wellness tools. Help support your clients with a Diploma in Holistic Health or Herbal Studies. Earn a Certificate in Holistic Nutrition and learn the most up-to-date research in the art of nutritional healing. Complete our Master’s Degree in Herbal Medicine, and become a trusted authority in educating clients and consumers about a mind-body-spirit approach to health and wellness.

Phone Number:

(800) 487-8839

Portland Address:

5005 S Macadam Ave, Portland, OR 97239

Hawaii Address:

81-958 Halekii St., Suite 5C, Kealakekua, HI 96750

Aroma Apothecary Healing Arts Academy (Level 2) (2015)

Colorado, USA

Director: Shanti Dechen, CCAP, CAI, LMT

Aroma Apothecary Healing Arts Academy offers a 200-hour Professional Program as well as a 300-hour Mastery Aromatherapy Certification Program designed to meet both the Alliance of International Aromatherapists (AIA) and the National Association for Holistic Aromatherapy (NAHA) requirements. After completion of 200-hours of study a student is eligible to take the Aromatherapy Registration Council (ARC) exam for National Registration.

Aroma Apothecary Healing Arts Academy offers professional aromatherapy certification courses for health professionals, holistic retailers and those who have an interest in aromatherapy and natural healing.

We also offer a signature course of Integrative Medicine: Five Element Healing, Aromatherapy Teacher’s Training Program, and several other integrative wellness courses. We invite you to learn more about nature's pharmacy and natural healing methods.

Aroma Apothecary Healing Arts Academy is also a Continuing Education Provider for the National Certification Board of Massage Therapy (NCBTMB), including New York.


Contact us: 888-276-6279 / outside the US 719-256-4759

Learn more about our Programs and Courses

Aromahead Institute, School of Essential Oil Studies (Level 2 & 3) (2009)

Montana, USA

Founder: Andrea Butje

Aromahead Institute offers a 235-hour and 400-hour Aromatherapy Certification Program designed to meet both the National Association for Holistic Aromatherapy (NAHA) and the Alliance of International Aromatherapists (AIA) requirements, respectively. Additionally the Institute offers a 5-day Teacher Training Program, a Business Class, and several Advanced Workshops in Essential Oil Chemistry and Medicinal Blending. All Aromahead Institute classes are taught on line.

All classes provide an in-depth exploration into the art and science of essential oil therapies. Andrea Butje is approved by the National Certification Board for Therapeutic Massage and Bodywork (NCBTMB) as a Continuing Education Provider. In additional, all programs are approved in New york and Florida for CEU’s in Massage Therapy.


Call: 727-469-3134 for more information

Aromahead Classes and Courses

Aromatherapy Today Education (Level 3) (2022)

Co-founders: Deby Atterby and Sandra Venables

Queensland, Australia

“Education that guides you to fill your dreams”

Welcome to Aromatherapy Today Education, a comprehensive Australian based College that offers the most up to date information on all aspects within this chosen industry, throughout all the courses we offer

So let us introduce ourselves!

Co-founders Deby Atterby and Sandra Venables have extensive experience and knowledge within the Aromatherapy industry, over a combined 50+ years. Deby has been involved in delivering courses in aromatherapy and aromatic medicine within Australia for over 20 years, while Sandra has been involved in both aromatherapy and homeopathy for over 15 years. Both Deby and Sandra have a passion for Australian essential oils, and the inclusion of these essential oils is a highlight of all their courses.

The courses we offer are at the highest level of education available within Australia, we continuously are assessing and researching all aspects of the industry to continue to maintain this elite standard.

Each course is designed with expertise from industry experts interacting and sharing their high level of knowledge to bring each module to you with the latest information in the industry. As industry changes our course will address these changes and continuously notify our students to keep them up to date.

We pride ourselves on excellence and for this we present Achievement Awards to those students that have shown strong expertise whether in theory or practical application of reaching their goals. These Achievements will also go on to be published in the Aromatherapy Today International Journal.

It is our policy to assess past education qualifications against our courses, and, if aligned, give RPL (recognition for prior learning) for your previous education.

We invite you to go to our website to read more about our courses!

The courses we offer are:-

*Diploma of Clinical Aromatherapy

*Intensive Australian Native and Common Essential Oils

*Aromatic SEE Protocol

*Aromatic Detox and Elimination Protocol

*Individual Ailment Assessments

  • Using Your Home Grown Essential Oil
  • Level 1 of Aromatic Medicine

Courses we offer may be undertaken online or face to face, and each module is paced for your individual needs to assure your study time is enjoyable, we also offer:

1. Free recording of how to research and …….

2. Access to student and lecture interaction

3. Flexible learning guides

4. Zoom live for some practical classes

5. Zoom live for some theory classes

6. Zoom live for brain storming/Q&A sessions

7. Guest Speakers

8. Certificate

9. Free 1 year subscription of the Aromatherapy Today International Journal when signing up for the Diploma

10. Free 1copy of the Aromatherapy Today International Journal when signing up for the Australian Native course

11. RPL’s offered

12. Student fees offer to attend the bi-annual Aromatica Australia conference

13. Achievement Awards

14. Publish your case studies in the Aromatherapy Today International Journal when publishing criteria is met.

Contact us directly for further information: or check our website:

Essence of Thyme College of Holistic Studies™ (Level 2 & 3) (2014)

British Columbia, Canada

Founder: Colleen Thompson


Essence of Thyme College of Holistic Studies (EOTCHS) is an internationally recognized school that offers two annually updated comprehensive and evidence-based online Aromatherapy Certification Programs.

The Professional Level Online Program and the Master Level Online Program were developed and are taught by Colleen Thompson - Registered Aromatherapist with over 28 years of experience in the fields of aromatherapy, product formulation, business, and adult education, and by Dr. Kelly Ablard - Registered Aromatherapist Conservation Biologist with over 20 years of experience in the fields of scientific research, animal behaviour and aromatic plant conservation and sustainability.

Both comprehensive online programs:

  • allow students to learn from anywhere, and at their own pace.
  • include flexible, accessible, and knowledgeable instructors to answer student’s questions within 24 hours.
  • offer online bi-weekly office hours to support and mentor students.
  • facilitate monthly open forums to engage students in current hot topics in aromatherapy.
  • offer monthly lectures, with guest lecturers in the fields of clinical aromatherapy, chemistry, evidence-based research, product formulation, safety, and aromatherapy careers, to keep students up to date and introduce them to key experts in the field of aromatherapy.
  • include personal case study and research mentors.
  • offer a student forum.
  • offer access to the extensive, resource rich Essential Library

The Professional Certification Level is 300 hours in length and covers anatomy and physiology, sustainability, research, 48 essential oils, 27 carriers, emulsifiers and preservatives, hydrosols taught by Ann Harman, CO2 extracts taught by Madeleine Kerkhof, and addiction and essential oils taught by Dr. Florian Birkmayer and Cathy Skipper. Students have a choice of a one-year subscription to Lab Aroma Grow or a one-year subscription to Blend Precisely included in their tuition.

The Master Online Program is 315 hours in length, is research-focused and covers 47 essential oils, advanced hydrosols taught by Ann Harman, advanced CO2 extracts taught by Madeleine Kerkhof, presenter and publication skill development, advanced blending techniques, advanced sustainability and your choice of one of five 50-hour electives 1) animal aromatherapy 2) aromatherapy in palliative care 3) aromatherapy and skin care formulations 4) teacher training and 5) herbalism.

The Professional Level Program is a pre-requisite to the Master Level Program, however if you have taken the equivalent of the Essence of Thyme Professional Program with a different aromatherapy school, you can apply to take the Master Program with EOTCHS.

The Gold Standard Aromatherapy Certification Diploma Program combines the Professional Program and the Master Program.

Tuition is in Canadian dollars.

Graduates of the EOT programs have lifetime access to all educational resources and receive discounts to additional EOT programs. Learn more by visiting our FAQ or contact us today at to begin right away!

Holistic Care Professional School (Level 3) (2015)

Kobe, Japan

Director: Yukiko Shibata

Holistic Care Professional School (HPS) is the only school offering a two-year clinical aromatherapist course recognized by AIA as a Level Three in Japan. A one-year professional aromatherapist course is also available. HPS is a contact point for the M technique® practitioner and instructor certification in Japan. HPS offers other advanced courses such as a Reflexologist course. HPS gives lectures in many medical institutions, nursing colleges and medical schools to promote understanding about correct and safe clinical aromatherapy.

All courses and lectures are conducted in Japanese.


Contact email address:

Shaktili Aromaterapia (Level 3) (2014)

Mexico City, Mexico

Director: Rebeca Ledersnaider

Shaktili Aromaterapia, AromAcademia, based in Mexico City, Mexico, offers a unique and specialized program in aromatherapy, in Spanish language, as well as courses that complement the work of the health professional. In addition, also offers courses and workshops for beginners, who want to incorporate aromatherapy in their everyday life . All classes are in person and online.


New York Institute of Aromatherapy (Level 1) (2021)

New York, USA

Founder: Amy Galper

Aromatherapy in Action Online Aromatherapy Certification Program

The New York Institute of Aromatherapy offers a Level One and Level Two Aromatherapy Certification Program, called “Aromatherapy in Action Online Certification Program” This Level One Professional Certification Course meets the requirements of both the National Association for Holistic Aromatherapy (NAHA) and the Alliance of International Aromatherapists (AIA), and the Level Two Aromatherapy Certification Program meets the requirements of NAHA to be a Certified Professional Aromatherapist Level 2.

Additionally, Amy Galper, the school Founder and core instructor, offers an Aromatherapy Entrepreneur program, Teacher Training and Plant- Based Formulations courses for the Aromatherapist.

All classes feature The BL3ND Solution Framework™️, a proven method for blending essential oils and plant botanicals into safe and effective aromatic remedies and skincare products. Course content deep dives into the power of olfaction, aromatic phytochemistry and skincare product formulation.

Amy Galper is a NAHA Certified Clinical Aromatherapist with over 20 years of experience as a successful Aromatherapy Entrepreneur, Teacher, Clean Beauty Product Developer and Author of 2 best selling books, Plant-Powered Beauty and The Ultimate Guide to Aromatherapy.


IG: @ amygalper


200 East 10th Street

New York, NY 10003

Eclipse Living Essence Aromatherapy Centre (Level 3) (2021)

Perth, West Australia

Principle / Owner: Joanne Lang

Eclipse Living Essence Aromatherapy Centre (ELEAC) has been delivering aromatherapy training for 30 years. Based in Perth, West Australia ELEAC delivering professional aromatherapy training throughout the world, we offer a 100, hour level 1 certificate and a 450, hour Level 3 Diploma of Clinical Aromatherapy course. Our training is evidence based, interactive and combines a wide variety of practical and theoretic skills to provide graduates with all the confidence and knowledge to enable them to work successful as an aromatherapist.

ELEAC also offer a wide range of short workshops which are advertised on our Facebook and Instagram pages as well as our website, or message us to register your interest.



Mobile: 0435 368664 (Australia)

Eclipse Living Essence Aromatherapy Centre | Facebook


International Aromatherapist Association (Level 3) (2021)

Seoul Republic of Korea

Director: Jinhee Park

International Aromatherapist Association is the only school offering an aromatherapy certification course recognized by AIA as a Level three in Korea.

The IAA for more than 20 years, has taught aromatherapy in Korea and successfully graduated aromatherapy practitioners. Practitioners can complete the traditional aromatherapy course and the advanced course Aroma Psychological Counselors' Certificate. Courses are taught suitable for government guidelines in Korea.


Contact email address:

Address: 107ho .27, Gangseo-ro, Gangseo-gu, Seoul, Republic of Korea

Sun Son International Academy of Aromatherapy (Level 3) (2023)


Founder: Shu-Yen Yen  

Director: Yi-Chun Lin (Jasmine)

Sun Son International Academy of Aromatherapy has long been committed to providing professional and evidence-based aromatherapy knowledge and courses in Taiwan. Through practical life-oriented courses, people learn about the natural health-preserving methods of aromatherapy, and arouse interest in aromatherapy, which can be used in daily home care to help maintain a healthy balance of body, mind and soul, and achieve a high-quality life.

Synchronize the world's latest aromatherapy courses and information, train holistic professional aromatherapists, and supports them to establish thriving aromatherapy careers.

Sun Son International Academy of Aromatherapy was established by the founder Shu-Yen, Yen in 2006.  In the same year, the school had been accredited by IFA Australia branch to teach international certification courses in Taiwan. Sun Son Academys Aromatherapy Certification Program is been approved by IAAMA International Aromatherapy And Aromatic Medicine Association since 2008. Thousands of students participated in the courses and workshops.  Hundreds of satisfied students have successfully completed the Aromatherapy Certification and become professional aromatherapists. The academy provide different kinds of professional aromatherapy courses, and also has flower essences therapy, aromatic kinesiology, ayurveda aromatherapyetc. courses related nature therapy.  We invited international aromatherapy lecturer to Taiwan holding seminars and sharing the latest information every year. Welcomes those who are interested in courses in Aromatherapy or related nature therapy to join us.



Contact email address:

Address: 1F, No. 152, Wenwu 2nd St., Qianjin Dist., Kaohsiung City 801, Taiwan


AIA approves applications from prospective schools with their own curriculum which are separate entities from AIA. AIA Recognized Schools have met the minimum curriculum guidelines as established by the AIA for each level. However a school may choose to teach curriculum over and above the AIA guidelines. AIA does not expressly endorse any curriculum or teachings that are outside the minimum curriculum guidelines established by the AIA. While AIA Recognized Schools are required to submit curriculum changes and/or additions upon renewal or re-filing of their listing(s), the AIA does not independently audit AIA Recognized School curriculum in between filings. An individual with a concern regarding an AIA Recognized School may file a complaint with the AIA using the form provided online.

About us

Founded in 2006, the Alliance of International Aromatherapists (AIA), a 501(c)(3) non-profit organization, is the professional organization representing aromatherapists.

AIA aims to increase awareness of and expand access to aromatherapists, help its members build successful practices, expand the body of aromatherapy research, and serve as a resource for members, the media and the public.

Click here to read more

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© Alliance of International Aromatherapists

3758 E 104th Ave #36  Thornton, CO 80233

Ph: 303-531-6377

Toll Free: 877-531-6377

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