Heidi Philippart is an AMI Trainer at the Assistant to Infancy level (0-3) and has worked with Montessori 0–3 for more than three decades. Based in Amsterdam, she trained in Denver with Judi Orion and has learned directly from pioneers of the AMI Assistant to Infancy programme, including Silvana Montanaro. Heidi is also an AMI Trainer of Trainers and an AMI External Examiner.

In 1996, she opened her own Montessori school in the centre of Amsterdam, where she works with 80–90 families each year. Her specialty is supporting parents in applying Montessori principles at home, including in bilingual families. Heidi has spoken internationally on key 0–3 topics such as toilet independence, the home environment, and the child’s development from birth to three.

Judith A. Orion, M.A., Director of Training, holds the AMI Early Childhood (3-6) diploma and received her Assistants to Infancy (0-3) diploma at the first AMI training for that level, given in Rome. Judi has conducted Primary and Infancy Montessori classes and is a trainer, examiner, and consultant at both levels. She conducted teacher training internationally and is a national and international seminar presenter at Montessori conferences. Judi was Director of Training for the first 0-6 AMI Diploma course. She has held numerous positions at AMI serving as a board member, and on both the Training Group and Scientific Pedagogy Group.  As previous  Head of AMI's Training Division she has overseen the enormous expansion of the AMI Training of Trainers programme.

Bachelor of Preschool Education, 0-3 and 3-6 Guide and AMI Trainer for 0-3. She has 50 years of experience in working with children and has a great international career. She is one of the 'first 5 AMI 0-3 coaches in the world so she has given courses and conferences in the USA, Canada, Mexico, England, Sweden, Belgium, Spain, Greece, Romania, Philippines, Thailand, Taiwan, China, Japan and Australia. She is a consultant and AMI examiner.

Junnifa Uzodike, founder of Fruitful Orchard Montessori in Abuja, Nigeria, is an AMI-trained guide (0–12) and co-author of the bestselling The Montessori Baby and The Montessori Child. A board member of AMI, she inspires families and educators worldwide to integrate Montessori principles into meaningful daily life.

Zoe Paul - AMI Auxiliary Teacher Trainer (0-3), Founder and Director of Studio Montessori School in San Francisco, USA, international speaker and lecturer. Zoe supports teachers, schools and other Montessori organizations, and governments in recruiting, preparing, and sustaining educators for children under three. She speakes English and French, with conversational Arabic. Her work is grounded in a multicultural, interdisciplinary approach to developing teachers and strengthening communities.

Erin Smith has been working in Montessori environments since 2001 and brings long-term classroom experience across the 0–3 and 3–6 levels. She has worked as an Assistant, Nido and Toddler guide, Primary guide, Parent–Infant Class Facilitator, and Instructional Coach. As an AMI Trainer and Assistants to Infancy Consultant for AMI/USA, she has contributed to training courses in the United States, Europe, and Asia. In her role as Director of Training and Trainer in Residence at The Montessori Institute, Erin supports the preparation of future Montessori educators and continues a strong lineage of AMI training with clarity, depth, and care.

Seiko Ohara is an AMI 0–3 Trainer, examiner, and consultant, based in Fukuoka, Japan. She is the Director of Training at the International Montessori Training Center (IMTC) and became the first certified AMI 0–3 trainer in Japan. With decades of experience in Montessori practice and teacher education, her work focuses on quality, responsibility, and deep respect for the youngest children.

Kavya Chandrasekhar is a Montessori guide, educator, and trainer based in India, with deep experience working with children from birth through adolescence. She is the Founder of The Montessori School and Kriyasthala in Bangalore, Founder of Reeva – Education for Life in Mysuru, and Executive Director of the Montessori Institute of Bangalore, an AMI training centre. As an AMI 0–3 Auxiliary Trainer, her work focuses on quality Montessori practice, community building, and advocating for the rights of the youngest children across diverse social and cultural contexts.