Our Studio Teachers


John Kortmulder
Yoga, Breathing & Meditation Instructor
Teaching with a healing direction, as therapeutic movement, breathing and meditation instructor; assisting with athletic training and personal improvement, as well as injury and illness support, post traumatic stress, TBI, stroke, physical therapy assistance, respiratory difficulties. Yoga experience- teaching weekly since in 2003, founder of the current Mindful Mountain Yoga, and also yoga and meditation teacher at Center of Gravity in Lexington, VA. Earlier proprietor of Yoga On Main in NY, yoga instruction at VA Hospital in Montrose, NY, yoga teacher at The Yoga Center, Roanoke, VA, and at the YMCA's in Lexington, VA and Lynchburg, VA, and teaching yoga for Amherst County, VA, Parks & Rec. Graduate of a year long 200 hour certified yoga teacher training at The Breathing Project, NYC; 2 year Respiratory Therapy program and EMT certification. Past experience includes 4 years as rehab assistant both with in-hospital and outpatient physical therapy, 4 years as ICU nursing assistant and support for patients with mental health challenges including suicide ideation, addiction withdrawal, and dementias. Practiced weekly sitting meditation and participated in week-long meditation retreats at Chung Yen Monastery, Carmel, NY, 2005-2007. Current meditation practice at Bodhi Path, Natural Bridge, VA. In 2005, year long Qigong instruction from Daria Fain (long time student of Mantak Chia, spiritual healer and Tai Chi master). 2004, Reiki level 1 certification. Originally learned meditation at a Sri Chin Moy center in 1971, with independent Buddhist study in high school.    

Tim Griffin
TAI CHI  and QIGONG Instructor, Yoga Teacher
Tim began his journey studying holistic and oriental philosophies in 1992. Meditation and yoga practice lead him into applied healing arts in 1998. After six years as a Certified Massage Therapist and serving as instructor at Natural Touch Therapies and School of Massage, Tim studied traditional indigenous healing with Rev. Bo "Running Medicine Wolf" Pagans. Tim offers Tai Chi / QiGong classes and teaches yoga at Mindful Mountain Yoga. He also offers private  instruction and offers individual massage and holistic bodywork at our studio.

Bonnie Black

Yoga Teacher

Bonnie M Black is recently graduated as a 200 hour Certified Yoga Teacher from Mindful Mindful Yoga in Amherst VA, and her personal meditation practice reaches back to 1975. She enjoys teaching therapeutic benefits to group classes and individual private classes. 

With 18 years experience as a Physical Therapist Assistant, Bonnie also worked with Outpatient Orthopedic and Aquatic Rehabilitation, and Long Term Care and Vestibular Rehab. She received the VA Physical Therapy Associationís Award for Outstanding PTA and the PTA Recognition of Advanced Proficiency from the American Physical Therapy Association in Musculoskeletal Rehabilitation.
Bonnie has been a Clinical Instructor for the Jefferson College of Health Sciences and provided Aquatic training for both Lynchburg College and Liberty University Athletic. She presented at the Athletic Training Symposium at Lynchburg College in April, 2014. Bonnie received her PTA degree from Jefferson College of Health Sciences , and graduated from College of Idaho  with a BA in Psychology and Art.
Formerly a dance teacher for Floyd Ward Dance Studios, she danced with Sacred Dance Ensemble of Lynchburg, VA for 9 years assisting with Choreography, and was a member of Sacred Dance Guild during that time.
Bonnie also taught pottery at the Fine Arts Center, in Lynchburg.

Malcolm Dendtler  
African and Caribbean Percussion Teacher
Malcolm teaches percussion with a variety of instruments, predominantly African djembe and Latin conga drums, emphasizing rhythm, technique, and timing.

Born in the heart of Brooklyn, Bedford-Stuyvesant, Malcolm picked up his drum sticks with the Carter Cadets Drum & Bugle Corp at age 13, and later he was a percussive marching member of The Riversiders, a Brooklyn drum and bugle corp. From 1973 until 1977 Malcolm attended Ithica College. In NYC he learned African drumming in street workshops from master Babatunde Olatudge and in sessions at the Jazz Mobiles in Central Park and Spanish Harlem, taught by such Latin Jazz legends as Willie Bobo and Niki Morero. After completing college, Malcolm began military service in Korea, involved in military drumming in Change of Command Ceremonies. After military service, Malcolm moved to Lynchburg, VA. Malcolm Dendtler has played percussion with Unity Band (rhythm and blues), Charlie Walker Band (jazz), Lew Taylor's Jazmine Band, Carol Austin and Sound of Harmony (gospel), and Judy Watkins Infinite Praise Mass Choir. He has also played in the musicals Cats, Evita, Phantom of the Opera, and Les Miserables with the Lynchburg Orchestra's Pop Symphony. He has provided percussive support for dance classes at Randolph College and Virginia School of the Arts, and for dance instructors Chuck Davis and his African Dance Troupe, Keith Lee, Marilyn Banks, Ken Boyd, Michael Hicks, and Jeff Moen, to name a few. As the Dance Theatre of Lynchburg formed, Malcolm joined in its mission and served as the Dance Theatre's musical director. Recently, he continued musical instruction at the Dance Theatre of Lynchburg and accompanies their Modern Jazz and Afro-Caribbean classes, as well as traveling with Dance Theater's Youth Dance Ensemble on Lecture-Demonstrations and holding percussion workshops in community centers.