About Us

Rosanna Lee, PT, C/NDT graduated with honors, from NYU in 1997. She has 18 years of experience working in a wide range of pediatric settings including early intervention centers, pre-schools, public schools, therapy/sensory gyms, in the home, and hospitals. She is dedicated to providing the best quality of care to her clients, and takes continuing education courses every year to advance her clinical skills.  Please click here to read parent testimonials.

Rosanna completed the 8-week certification program in the Neuro-developmental Treatment (NDT) Approach for Children, which focuses on the assessment of children’s posture and movement patterns and facilitation of more efficient and fluid movement patterns. She completed the 2-week Advanced NDT Baby course and completed the 4-day Advanced NDT Ribcage and Upper Extremity course.  Rosanna has taken numerous courses in sensory integration and has completed the 4-week certification program in Sensory Integration Praxis Testing (SIPT), which focuses on evaluation of a child’s ability to interpret sensory information and effectively motor plan, interpreting those findings and treating based on those results. Rosanna is trained in Greenspan’s DIR/Floortime model which focuses on keeping a child motivated and engaged during play.  She has taken courses in Pilates and yoga, and incorporates that into the strengthening and flexibility portion of her treatment exercises, as appropriate.

Rosanna is a treatment provider and evaluator for Early Intervention, treatment provider for CPSE, and CSE.  She also provides Private PT evaluations, treatment, and detailed home exercise programs. Rosanna also speaks Taishanese and Cantonese.

Rosanna Lee, PT, C/NDT, C-SIPT


Marta Canaan MS, OTR/L is a licensed and certified NYS Occupational Therapist with over 9 years of experience working with children in Brooklyn, NY. Marta has earned a post-graduate Master’s in Occupational Therapy from FIU, and has completed various post-professional courses related to pediatric OT practice. She is trained in the use of the Therapeutic Listening Program (4/2008), and completed a mentorship with Mary Kawar MS, OTR to provide the Vestibular-Oculomotor Protocol (sound activated vestibular-visual protocol). She has also taken nutrition and feeding related courses, sensory integration for early intervention courses, Brain Gym courses, a visual processing related course, Handwriting Without Tears program course, and advanced courses in sensory integration therapy. She conducted research related to Sensory Processing Disorder in children, in order to further inform her practice as an evidence-based practitioner.

Marta has worked with children in a therapeutic nursery, preschool, pediatric therapy clinic, schools, and home based settings. She is an approved provider of Early Intervention services and evaluations, as well as an independent provider of OT for the NYC Board of Education, and as such can provide related services to preschool and school-aged children. She began doing so in home settings, and has now expanded her practice to the clinic in order to provide holistic care along with other clinicians. She is passionate about working with children of all ages and abilities to reach their full potential and live their lives to the fullest, with a focus on treating the whole child. Her love of OT began when working in South Florida with children with special needs in summer and day camps. Marta strives to address what matters most to children and their families by always engaging in family-centered practice. Marta is bilingual as she is fluent in both English and Spanish. Please click here to read parent testimonials.

Marta Canaan MS, OTR/L


Natalie Kimmelman Maroni, MA, CCC-SLP/TSLD  is a Brooklyn-based speech-language pathologist who received her M.A. in Speech-Language Pathology and Audiology from New York University and her B.A. from Columbia University. She holds her Certificate of Clinical Competence (CCCs) from the American Speech-Language-Hearing Association (ASHA), her New York State Speech-Language Pathology license, and her certificate as a Teacher of Speech and Language Disabilities (TSLD). During her years at the Rebecca School, as well as in private practice, Natalie has worked with young children and adolescents with mild to severe Autism Spectrum Disorder (ASD), Pervasive Developmental Disorder (PDD-NOS), Developmental Apraxia of Speech (DAS/CAS), Fragile X Syndrome, Cerebral Palsy, Prader-Willi Syndrome, Angelman Syndrome, and other global developmental delays. Through her work at pediatric private practices and sensory gyms, Natalie continues to specialize in addressing language and articulation delays, phonological disorders, social/pragmatic deficits, auditory processing disorders, apraxia, and oral-motor difficulties.

Natalie is trained in PROMPT (Prompts for Restructuring Oral Muscular Phonetic Targets), DIR-Floortime, and oral-motor therapy techniques. She also has experience treating pediatric feeding disorders using a language- and sensory-based approach. Additionally, Natalie has developed and programmed alternative and augmentative communication (AAC) systems and devices, ranging from PECS (Picture Exchange Communication Systems) to iPads (Proloquo2Go, My Choice Boards) to dedicated devices (ProxTalker, Dynavox). Through her years working as an assistant kindergarten teacher in the public schools, she has extensive experience supporting children as they develop early literacy skills and phonemic awareness, and is trained in the Wilson Fundations Language Basics program. Natalie has a long history working with children prior to becoming a speech-language pathologist, as an assistant kindergarten teacher, classroom assistant, and one-to-one aide in various special-needs schools and recreational programs in the Westchester-Manhattan area, including the NYC and Ardsley public schools, Learning Spring Elementary, and the Parkside School.

On a personal note, Natalie grew up with a wonderful younger brother with autism. Thus, she is very aware of the unique challenges and rewards of having a family member with special needs, and is well-versed in much of the current news and research in the field. Natalie is passionate about combining evidence-based practice, creative play, and engaging activities to foster growth, and about working with children and families together to achieve speech and language goals.

Natalie Kimmelman Maroni, MA, CCC-SLP/TSLD


Mary Hartmann, R.N, M.I.F.H.I. comes to “Small Steps Big Leaps” with her vast experience of forty years as a NYS Registered Nurse. She has worked in hospital and school settings with hundreds of adults, children and families in her capacity as nurse, health educator and nutrition counselor.

For the past twenty-five years, she worked as a school nurse, first at a school for children who are hearing impaired, then at a school for children with developmental challenges as well as emotional and behavioral difficulties. She provided health assessments, daily medical interventions and periodic hearing screenings for children. She counseled parents and staff on effective treatments for medical issues like asthma, allergies, seizures, ADD, ADHD and developmental disorders.  She also served as coordinator of a Health Education Program, facilitating parent’s groups and staff development trainings in conventional and holistic approaches to health and wellness.

Mary’s interest in holistic health led her to study and do research on a variety of complementary medical approaches like homeopathy, naturopathy, reflexology and nutrition, just to name a few. She is trained in homeopathy, which she has used extensively for herself and her large family—ten children and twenty-one grandchildren. She has educated many about the science and applications of homeopathy for thirty years. Although she does not provide homeopathic prescription, she incorporates this knowledge when counseling, and can refer you to homeopathic practitioners as needed.

After almost twenty years of personally trying different nutrition programs, Mary concluded that “one nutrition program does not fit all!” This was confirmed when, in 2003, she learned about blood type-targeted nutrition, the science of nutrigenomics and epigenetics. This approach recognizes the uniqueness of each person, the relationship between a person’s genetic makeup and nutrition’s impact on his or her health. In 2005, Mary received her master’s level certification from the Institute for Human Individuality.  This has enabled her to offer individualized nutrition counseling. Through the use of a blood-type targeted food database, she is able to give specific food choices for meals, for example, and to guide each person through a simple and easy transition into his or her nutrition plan.

Navigating through a more integrative approach to health is not always easy. Mary’s 40 years of experience as a nurse, health educator, and her knowledge of holistic medical approaches, makes her a valuable resource for providing families with individualized nutrition counseling.  For a nutrition counseling appointment, please call Mary at 917-538-3890 or e-mail her at mhartmann_5@hotmail.com.

Mary Hartmann, R.N, M.I.F.H.I.


Renee Ortega, MS, COTA/L, R-DMT, SIPT, LCAT is a certified occupational therapy practitioner.  In addition she is a registered dance/movement therapist and licensed creative arts therapist (LCAT).  Over the course of the past several years she has worked with the adult and pediatric population in both occupational therapy (OT) and dance/movement therapy (DMT).  Ms. Ortega has specialized and trained in the areas of SIPT certification, applied behavioral analysis, interactive metronome, Wilbarger protocol and Stanley Greenspan’s Floortime in addition to other therapeutic techniques and approaches.  She has educated, trained, and supervised students and treated clients pairing techniques and tools from both professions.  Her area of research is how culture impacts the social/emotional development of children. She is currently pursuing a Phd in International Psychology with a trauma concentration and strives to apply these principles and philosophy in her private and community practice and research. She has joined Small Steps Big Leaps to provide social movement classes for groups and individual children.

Renee Ortega, MS, COTA/L, R-DMT, SIPT, LCAT Limited Permit


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