The Cave

Staff at The CaveCave Tag


Get to know our family. The Caves's coaching and support staff have backgrounds and experience in a wide variety of sports and other disciplines. With extensive knowledge in strength training, conditioning and kinesthetics our programs will help you obtain and exceed your goals.


Roger Harrell

Roger Harrell

Roger comes to The Cave with over 20 years of experience in gymnastics, and over 15 years of coaching experience. His passion for fitness is contagious. His technical knowledge and scientific approach help to refine everything we do. Roger holds a B.S. in Chemical Engineering and spent several years working on enormous processing plant projects, ore refinement systems and chemical weapons disposal facilities. Throughout it all he has kept a hand in coaching and training and has finally dedicated full time to his true passion. Roger has been involved in CrossFit since the early days and is also the gymnastics curriculum writer and core competency expert for the global CrossFit community.

  • Level 3 CrossFit Certification
  • Founder CrossFit Gymnastics Certification Program
  • Co-Founder CrossFit Marin

Role: CEO/CIO, Coach

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Russell Bruel

Russell Bruel

Russ started working at The Cave (formerly Crossfit Marin) in late 2006 and has happily been part of its growth since then.

From teaching movement education to 2 and 3 year olds while they learn how to jump, roll, lift, and land safely, to coaching Gymnastics as well as mentoring young children and teens to approach life with confidence through physical accomplishment. To coaching adults who have never approached the sport of Gymnastics for fear of injury, to the wonderful community of CrossFiters which attracts everyone from ex athletes who strive for excellence and love to test and retest their athleticism, all the way to the average Joe/Jane who wants to get off the couch and get in healthy shape. His approachable patient nature, love for moment and his enthusiasm for what the body is capable of achieving drives him every day to pass on that knowledge to whom ever crosses his path.

Whether it be Gymnastics, CrossFit or Parkour, his life long experience with understanding the human body allows him to teach movement to all who enter the Cave in a progressive, safe manner.

  • Level 1 CrossFit certified
  • 31 years of experience in the sport of Gymnastics
  • 21 years of coaching Gymnastics (recreational as well as competitive)
  • 7 years experience coaching CrossFit

Role: Facilities Director, Coach

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Amanda Norton

Amanda Norton

Upside down and smiling -- that's how Amanda's parents always found her as little girl. By the age of 4, after years of watching her flip around the house, Amanda was happily enrolled in gymnastics and was off to a lifetime involved in athletics.

Amanda found great success as a gymnast as she competed for over eight years, winning several impressive titles including a few State Championships and one National first place on the floor exercise. Injuries became an issue for Amanda so she slowly phased out of competition and into coaching.

She went on to study at UCLA, and graduated with a degree in World Arts and Culture with a focus in Dance Studies. She found that dance could be used to help fill the void without gymnastics. But, then came CrossFit...

CrossFit put Amanda back in the gym and reintroduced her to gymnastics. She now feels better than ever, with no injuries or lingering pain. She wishes she had CrossFit while she was a competing gymnast because she feels she would have been better and stronger. As a coach, this offers her a unique perspective on how to help her athletes, and how to develop well balanced athletic programs at The Cave.

Amanda is currently the Athletics Director and a premier CrossFit and Gymnastics coach at The Cave, home to CrossFit Marin. Aside from her life at The Cave, she stays active in the community as a volunteer firefighter and EMT, as well as having been the Director of a free Jr. Lifeguard Program for 8 years. She is currently in school to further her career in the medical field, while working hard to put her name on the map of the CrossFit community. Already making a mark as a 2012 and a 2014 Northern California Individual Regional competitor, Amanda is still smiling.

Role: Athletics Director, Coach

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JB Douglas

JB Douglas

JB was born in southern California and raised in San Pedro. His mother, father, and brother are a big part of his life. Growing up he can remember this need to constantly challenge himself. He did this in many ways: gymnastics, skateboard, sliding down the stairs in cardboard boxes, snowboard, surfing, rope swings, basketball, baseball, swimming, making up obstacle courses, climbing trees, beach, volleyball and of course monkeying around. In high school he focused on basketball and played 4 years on the varsity team for Palos Verdes High and loved it. He is still very close with his coaches and teammates from that time.

JB Moved to Sonoma County in 2006 and attended Sonoma State University where he earned a business management degree. In 2010 he started an internship as Director of marketing at Rohnert Park Gymnastics where they had a brand new parkour class. One thing lead to another... and when he graduated in 2011 it was clear his passions were movement and inspiring movement in others. JB believes that God has a plan for him and it involves sharing his innate ability for movement with others.

Since working at the Cave JB has picked up slack lining and an interest in CrossFit. The Cave also helped him train for American Ninja Warrior 4 and 5 where he made it to the finals in Las Vegas both times. Season 4 falling on stage 2 on the unstable bridge and ANW 5 failing on the jumping spider in stage one of Mount Madoriama. He has tried out for season ANW 6 and 7 but hasn't received a call back. But he says that doesn't discourage him from training and continuing to strive for total victory. Wish him luck as he is always trying.

Role: Parkour Director, Coach

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Amy Therese Dockus

Amy Therese Dockus

Amy joined The Cave after spending a year in Africa (12 different countries), working for 8 different non-profit organizations. She worked in orphanages, with street children in the Kampala slums, taught kindergarten and art classes, helped coach a girl's soccer team in the Kibera slums, helped build and paint schools, photographed people and schools for fundraising and social media back in the US and did a large-scale art project/mural with a village school in Northern Uganda. Her outreach and working with children were clear indications that she was a good fit for The Cave.

Even though she works in an administrative capacity at The Cave, she is no stranger to physical pursuits. She was a strong soccer player from an early age, often playing on boy's teams because the opportunities for girls were limited. She was an All State player in high school and was recruited to play Division 1 soccer for Villanova University (graduated with a Bachelor of Arts degree, double major in English and Communication Arts). You'll find Amy taking work breaks to jump in on a CrossFit class or go for a run. Prior to her work in Africa, Amy worked in a variety of service and management positions, including being a product development manager for Restoration Hardware. Loving the idea of being surrounded by health conscious people, she chose to join The Cave as part of a healthy lifestyle choice. We are thrilled to have her running the office.

Role: Office Manager

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Crystal Montgomery

Crystal Montgomery

Crystal is from Arizona where she grew up playing sports with her four brothers, riding horses and doing 4H. When she is not working she's an active photographer, hiking with her pup, or riding horses. She tried shifting to a paleo diet due to health issues and it has changed her life. She loves to cook paleo and experiment with new recipies. Her long term goal is to open a paleo cafe. Since working at The Cave she has started doing parkour and CrossFit and is hooked. You can find Crystal working in the office and running birthday parties, Kid's Night Out and coordinating our events.

Role: KNO/Birthday Lead, Coach

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Andrey Pfening

Andrey Pfening

Andrey Pfening was born on March 11th, 1990 in Samarkand, Uzbekistan. He spent his childhood in Samara, Russia, and at the age of 12 moved to America and has resided in San Francisco Bay Area ever since.

While in high school, Andrey came across a youtube video of David Belle (co-founder of parkour) and instantly was drawn to the activity and began seeking out knowledge and experience. He practiced with friends and then dedicated himself to training on his own several days a week. As he gained proficiency, others were drawn to his abilities and in turn attracted to his teachings.

Andrey has now become a recognizable member of the parkour community. He helps orchestrate local jams in San Francisco and is committed to educating himself about parkour and the most effective teaching tools. He regularly attends local and national parkour summits, with well known practitioners, which review the most up to date trends in the discipline and how to implement these trends into his teachings.

Outside of the gym, Andrey spends a lot of time coming up with skill progressions, class outlines and visual aids which assist his physical and vocal style of teaching. He uses video of himself and his own students to break down progressions, frame by frame.

Annually Andrey performs in live performances, working with local and international choreographers. As well as periodically choreographing and performing pieces of his own.

Role: Coach

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Seraphina Schinner

Seraphina Schinner

Sera has been a member of The Cave since our early homeless days. She joined us when we were running Sunday classes in Town Park in Corte Madera. At 13 years old she started practicing parkour when the sport was still vastly unknown. She was hooked. Sticking with us through cold afternoons and wet grass, she helped us lug equipment to and from the original storage unit and then the tiny gym we first put together. She quickly learned about all of the disciplines trained at The Cave and joined the team as a coach. Over the next few years she became an invaluable member of the team and a premier parkour coach. She has also proven herself to be a capable CrossFit athlete and coach being among the youngest level 1 certified CrossFit coaches in the country.

  • Level 1 CrossFit Certification

Role: Coach

Contact Seraphina

Nancy Rush

Nancy Rush

Nancy Rush comes to The Cave with a gymnastics career which began in 2002. This includes 8 years at Redwood Empire Gymnastics, 1 year at Rohnert Park Gymnastics, and currently with Flying Angels Gymnastics traveling throughout Sonoma and Marin teaching gymnastics at preschools.

Nancy has taught gymnastics to children from 18 months to 12years old, but her focus the last 5 years has been with preschool aged children. She was the Director of the Preschool program while at RPG. Nancy believes that gymnastics helps children build self-esteem, self-confidence and mind to body awareness all while having FUN!!You will also see Nancy teaching ballet to the team girls at The Cave. Ballet helps gymnasts with their strength, control, grace, and musicality. Nancy was drawn into the world of gymnastics by teaching ballet to all the team boys and girls at REG (about 100 kids!) You see, Nancy's background is in dance. Originally from the Chicago area, Nancy studied dance since she was a young girl, then moved to San Diego and graduated Magnum cum Laude with a BA in Dance from USIU's School of Performing and Visual Arts. While in San Diego, Nancy performed/worked at two Dinner Theaters. After moving to the Bay Area, Nancy was principle dancer, and instructor with the Paul Scardina Dance Company in San Francisco. Since 2009 Nancy has been a choreographer for Cinnabar Theater's Young Rep productions. Most notable are Lady Be Good, Willy Wonka, Into the Woods, and Annie.

Nancy is happily married, has two children, and two grand children and lives in Petaluma. She is crazy about dogs and has three!

Role: Preschool Coach

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Sheridan Sperry

Sheridan Sperry

Sheridan comes to The Cave after many years of administrative and client service experience in the corporate world. As with many of our staff, she wanted a change of environment, while integrating her career and passion, physical fitness. Her eagerness and enthusiasm were immediately apparent to us and we knew she would be a great addition to The Cave family. Sheridan is a long time yoga practitioner and power walker, and has now added CrossFit to her pursuits. She is another representation of how keeping a focus on health throughout life leads to a much higher quality of life in our later years. Sheridan has 3 children, one son and two daughters, and 2 teenage grandchildren. Her children are all active in sports and other physical pursuits, including yoga, salt water swim competitions, soccer, water polo, swimming, power walking, cycling, running and hiking. All are "subscribers" to healthy eating (the teenagers as much as possible!), and her son follows the Paleo diet.

Role: Front Desk, Administration

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Matthew Beier

Matthew Beier

Born in Duluth, Minnesota, Matthew Beier joined the Cave's administrative team in 2014. He attended film school at Chapman University in 2003, where he studied screenwriting, film production, and English before spending a final semester abroad at Victoria University in Wellington, New Zealand. Apart from being a fitness and nature enthusiast, he is a novelist, screenwriter, photographer, and graphic designer. His first novel, The Breeders, was published in 2012, and his second novel, The Confessions of Jonathan Flite, was published in 2014. Outside the Cave, he is currently writing Book 2 of his Jonathan Flite Series, The Release of Jonathan Flite, and developing his first feature film.

He cultivated a love for backpacking, hiking, and the outdoors while in New Zealand, and he currently incorporates these things into his home-gym activities that involve his trusty pull-up bar, adjustable dumbbells, and kettlebells. Joining the Cave was a huge bonus for Matthew, as it opened up many new roads toward fitness for him.

Role: Front Desk, Administration

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Hannah Hoy

Hannah Hoy

Hannah came to The Cave with many years of experience in the competitive sports and fitness industry. In addition to her more than ten years as a competitive figure skater and avid dancer, Hannah has over four years of coaching, nutritional planning, and personal fitness training experience. Prior to her recent relocation to the Bay Area, she graduated from The University of Tennessee where she earned her Bachelor's Degree in Psychology with a focus in motivational psychology, nutrition, and health sciences.

Here at The Cave Hannah works in office administration and as a gymnastics coach. She coaches children ages eighteen months to twelve years old and specializes in flexibility, form, strength, and kids with disabilities. It brings her great joy to work with kids everyday and see them succeed at even the smallest of tasks. She loves having fun, laughing, and most of all helping kids learn! When not in the gym, Hannah can be found hiking, writing, snowboarding, or biking; no matter what the activity, she simply loves exploring, staying active, and living a healthy lifestyle.

Role: Events Coordinator, Administration, Gymnastics Coach

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Chelsea McAlexander

Chelsea McAlexander

Chelsea recently moved to the Bay Area from Columbus, Ohio where she lived her entire life, previously worked as a CrossFit and CrossFit Kids Coach and with Columbus Public Health doing nutrition education and community support to young families. She enjoys every type of movement and loves learning and growing as an athlete and coach in new, fun and challenging ways. In high school she started working at a gym as a lifeguard, fitness assistant and youth programs coordinator where she took personal interest in movement, nutrition and wellness. After college she taught group fitness classes until falling in love with CrossFit and getting her Level 1 certification. She has trained competitively in Lifeguard competitions, swimming, Powerlifting, CrossFit, Olympic Weightlifting, and Strong(wo)man.

She also enjoys yoga, swimming, hiking, biking, and snow boarding. She stumbled (almost literally) into The Cave adult gymnastics class and hasn't really wanted to leave since. She is excited about the new city, meeting and coaching new people, and learning new ways to move, be healthy and have fun.

  • Registered Dietetic Technician with The American Dietetic Association
  • Certified USA Weightlifting Coach
  • Level 1 CrossFit
  • Level 2 CrossFit
  • CrossFit Kids
  • AFAA certified fitness trainer

Role: Youth Strength and Conditioning lead, CrossFit Coach

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Stephanie Main

Stephanie Main

Stephanie, creator of Endure Yoga, is an athlete who absolutely loves yoga. Movement has always been a part of her life starting with ballet at age 3 and moving to competitive cheerleading at age 16. She started practicing yoga in college but it was years later when she was inspired to compete in triathlons that than her yoga practice was taken to the next level. Stephanie utilized yoga to increase her overall performance and complete more than a dozen races including two Marathons, a Century Ride and two Half Ironman races. Yoga continues to be a big part of her life as she has transitioned to running and CrossFit and she continues to use yoga during training seasons for cross training, mental focus, stress relief and injury prevention.

  • 500 Hour RYT- 500 Hour Registered Yoga Teacher Through Yoga Alliance
  • CrossFit Level 1 Coach
  • CrossFit Mobility Trainer
  • Team ICG Indoor Cycling Instructor
  • CPR/AED Certification

Role: Coach

Contact Stephanie

Joshua Morris

Joshua Morris

Josh came to the cave with a background in gymnastics and parkour. He has been doing parkour for over four years. Josh loves parkour because it helps him have control over his body, it allows him to express himself through movement, and he loves the physical benefits of participation. Josh has wanted to coach since he was 5 years old and it shows. He takes a personal interest in the students at The Cave and has quickly shown himself to be a fantastic coach. The most important things in Josh's life are his family, his dog, music, parkour, and nature.

Role: Parkour coach

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Perry Kindel

Perry Kindel

Perry recently graduated from high school and has joined our fantastic crew of gymnastics coaches. She was a level 9 competetive gymnast. Winning the FCIACC (Fairfield County Interscholastic Athletic Coveference) and ranking 3rd on beam in New England. Through most of her training she had Russian coaches and has a strong sense of their developmental program.

Role: Gymnastics coach

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Zach Retzlaff

Zach Retzlaff

Zach has been a part of The Cave for 7 years. He started here as a student both in gymnastics and parkour. He has been coaching for over a year. He truly enjoys movement and has found himself happiest when he is spending time outside being active. He enjoys parkour, climbing trees, mountain biking, scuba diving, surfing, skiing, and pretty much any adventurous activity.

Role: Parkour coach

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Nora Leah. Gift

Nora Leah. Gift

Leah was born in Texas but raised in the Southern peach state of Georgia, where she helped run her family's commercial painting and design business until her love for travel and opportunity led her to explore the world. She has lived in many states across the country and worked as a Spanish translator in Central and South America. Ultimately, she has settled with her husband and son in the Bay Area, where she graduated from UC Berkeley with a BA in American Studies, concentrating in Organizational Behavior and Leadership.

In sharing with The Cave's health culture, Leah also has a strong respect for fitness and overall well-being. She completed a 200-hour Yoga Alliance Certified Teacher Training Program through Yoga Tree and is currently studying for the NASM CPT test. She enjoys time with her family and their dog Titan, exploring trails and beaches across the Bay, fishing, yoga, dancing, and time with friends.

Role: Front desk, Administration

Contact Nora Leah.

Hannah Ferguson

Hannah Ferguson

Hannah was born in Raleigh, NC as a middle child with two brothers. In high school she was drawn to work with the autistic students and approached the principle to create a club so they would have a time during the week to just be themselves around friends and talk about their common interests after school hours had ended. She coordinated everything and it was a huge hit. It is still a club to this day. Her mother and two aunts are all elementary pre-school teachers so Hannah is following in the family tradition of teaching. She was the lead facilitator for the fairfax youth club in 2015, lead camp councelor this summer for a local camp focusing on personal development and social responsibility for teens. She is looking at studies in early childhood education to further her teaching goals.

Role: Gymnastics coach, Events lead

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Susie Burch

Susie Burch

Susie comes to us from Toronto, Canada, but has called Marin County her home since 2005. Growing up north of the 49th parallel, she pursued a variety of sports including varsity men’s high school and college hockey, swimming, cross-country running, track, triathlon, cycling and rowing, winning provincial, national and international competitions along the way. Concurrent with her sporty lifestyle and outdoor adventures, Susie earned an MBA in macro-economics and marketing, and applied it to a decade-long career in pharmaceutical marketing. As a lifetime athlete, Susie has had a passion for the science of human metabolism, nutrition and exercise physiology - knowledge that has served her well in her personal life, with multiple wins in road and trail half-marathons post-pregnancy, and top-tier finishes in Olympic Distance Triathlons. Now that her four children are in elementary school, Susie has ditched the corporate world to pursue her passion in fitness and athletic performance whole-heartedly. She has become a student of the CrossFit methodology, and complements it with the ACE Personal Trainer certification for a solid foundation upon which to coach and train her clients.

  • Level 1 CrossFit
  • Certified ACE Personal Trainer

Role: CrossFit Coach

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Jean-Michael Bernard

Jean-Michael Bernard

Starting in his early childhood, JM was an athlete. He started out with soccer and even made the newspaper for junior league! From there, he did tennis, baseball, basketball—name a sport, and he might’ve had experience in it. His athletic skills really shined, however, during free play and and strength practice. That understanding led him into gymnastics and CrossFit in 2010. He has spent every week since practicing gymnastic strength and studying movement patterns, anatomy, nutritional effects, and anything that would help him become the strongest he can be. Eventually, JM managed to achieve a few strength goals, but through self-reflection, he realized he didn’t have the wisdom he wanted. Starting in 2012, he began teaching. In the beginning, it was just strength building techniques and then CrossFit. Now, he has reached his primary interest: gymnastics.

Role: Gymnastics coach

Contact Jean-Michael

Jacqueline Smith

Jacqueline Smith

Jackie grew up on Lake Seminole in Largo, FL. From ages 3-14, she was a gymnast at LaFleur’s Largo. She became a competitive gymnast Level 4 (team state champs), Level 5 (team state champs), Levels 8 and 9 (national alternate), and Level 10. Jackie held seven high school track records ((100m, 200m, 400m, 100m hurdles, 300m hurdles, 4x1 relay, 4x4 relay), and in high school diving, she was a district champion and regional and state qualifier, which later allowed her to walk onto the University of Florida diving team. Jackie has coached diving for three Florida high schools in Gainseville, FL, as well as club diving and club gymnastics in Bradenton, FL. After graduating Magna Cum Laude from University of Florida with a BS in Digital Arts and Sciences Engineering, Jackie went on to earn her MS in Interactive Entertainment from Florida Interactive Entertainment Academy. She has worked at EA Sports on Madden 12 and NCAA 12, at Lucasfilm Animation on Strange Magic, and at ILM/LucasArts on Star Wars 1313. She currently also works at Lucasfilm Ltd. as part of ILMxLAB. Jackie has been participating in Adult gymnastics at The Cave since December 2011 and has been coaching here since August 2014. She also loves rock climbing, CrossFit, wakeboarding, water skiing, snowboarding, snow skiing, and hiking.

Role: Gymnastics coach

Contact Jacqueline

Alexis Gilbert

Alexis Gilbert

Alexis grew up playing competitive soccer, tennis and doing cross country running. She considers herself a water girl - the happiest times for her are when she is on or near the water. She rowed for her university as a member of the varsity team. Since then, she consistently goes kayaking, canoeing and stand-up paddleboarding. She did CrossFit for about a year and half, where she gained tremendous physical and mental strength. She currently does sports performance training, kettlebell and vinyasa yoga. As a whole, she is extremely passionate about changing one's personal habits to become the strongest person you can be, mentally and physically. She believes that if you want to change the world, you first have to start with believing in yourself. She grew up in Seattle and then headed off to college in Oregon. In Oregon, she received her BA in Spanish & Politics and then her MBA, both from Willamette University. In her program, she focused her time on Business Strategy and Marketing. This led her to the Bay Area, where she joined a local Bay Area start-up as the head of marketing and led strategy efforts. Realizing that her heart has always been in athletics, she joined Equinox in San Francisco as a personal trainer and then taught stand up paddleboarding and kayaking in the summer of 2015 at the Berkeley Marina.

Role: Office & Event Administration

Contact Alexis