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About Bio Health Care

Bio Health Care, LLC works with companies to provide a unique and proven solution to reduce workplace injuries. Clients recognize the savings of our program because of our proven system that not only finds solutions for discomforts but also keeps employees on the job.

Dr. Stephen Grennan, DO, DC

Founder and CEO

Dr. Stephen Grennan DO, DC is a renowned expert on Occupational BioMechanics & Injury Prevention Programs. He began his career with a degree in Orthopedics and a Doctorate in Orthopedic Chiropractic from Sherman College in South Carolina. For 30 years, Dr. Stephen Grennan has helped companies and workers fight the financial and human costs of musculoskeletal disorders occurring in the workplace.

 

Since 1998, Dr. Grennan and his team have worked with the leaders of industries to create specific injury prevention programs with a focus on:

  • finding solutions for discomforts

  • providing advice and tips for daily prevention habits

  • educate employees on how to prepare for overextension

  • stretches for individual needs

 

Dr. Grennan has worked with 22 industries and written 23 separate injury prevention booklets. He is passionate about finding solutions for employees, offer a better quality of life for employees, and assist companies in creating safer work environments.

Contact
  • LinkedIn
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Jin Qi

Strategic Growth Leader 

Jin is an accomplished business professional with a broad, cross-functional background spanning marketing, key account management, market development, and human resources. She has built her career across some of the world’s most respected multinational companies, bringing a unique blend of commercial insight and people-centered leadership to every role.

Jin graduated #1 in her class and has 20 years of entrepreneurial experience in the USA with several Fortune 500 and 100 companies.​ She began her career at Coca-Cola China as a Market Development Executive, contributing to regional business growth through strategic market analysis and execution. Her career then expanded into human resources, where she served first as an HR Executive and later as HR & Administration Manager at Watsons China, leading talent development efforts and overseeing organizational support and administrative functions.

Jin served as Head of Marketing at Kellogg’s China, where she supported brand initiatives and consumer engagement strategies. She then joined Unilever China as a Key Account Executive, managing major retail partnerships and driving sustained sales performance.

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With a well-rounded foundation across both commercial operations and HR leadership, Jin brings a holistic perspective to business strategy, organizational development, and cross-functional collaboration. Her multifaceted expertise and leadership will play a key role in driving BioHealth Care to the national level.

Contact
  • LinkedIn

Heidi Roberson, CA, MT

Director of Operations

With over 20 years of experience in therapeutic and allied health settings, Heidi brings a deep understanding of human performance and wellness to her role as Director of Personnel. Her extensive background includes opening clinics in multiple regions across Arizona and leading massage therapists, exercise therapists, physical therapists, chiropractors, and osteopaths. Together, working hands on, restoring natural structure to help individuals—from triathletes to seniors—enhance their daily function and overall quality of life.

 

At the core of Heidi’s current role is her dedication to supporting industrial laborers in achieving peak performance while minimizing injury risk. She oversees 21 companies in 16 states as well as all of the Hawaiian Islands. The ever expanding staff, staffing logistics, contract management, invoicing, client communications, and serves as the primary liaison between doctors, staff, and partnering companies—ensuring seamless operations and trusted relationships.

 

Before stepping into her leadership role, Heidi was a business owner in Northern Arizona and held licenses as a massage therapist in both Arizona and Washington. She is also a Certified Chiropractic Assistant, adding depth to her hands-on understanding of therapeutic care and workplace health.

 

Heidi’s unique blend of clinical insight, business acumen, and operational leadership makes her an essential part of the continual growth of the company’s mission to support sustainable workforce wellness.

Contact
  • LinkedIn
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Our Team

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Injury Prevention Practitioner

Cassadei Holston

Cassadei Holston is a dedicated wellness professional with a strong background in fitness training, therapeutic exercise, and employee-centered care. At Bio Healthcare, she leads clients through customized movement programs focused on recovery, mobility, and overall functional health and harmony of the body.

 

Cassadei began her career in San Diego as a certified personal trainer with NASAM, working with a diverse clientele included Wounded Warriors to improve strength, posture, and body mechanics. Her passion for helping others heal and perform at their best led her to specialize in therapeutic fitness and corrective movement strategies.

 

At Bio Healthcare, she collaborates closely with healthcare professionals to deliver integrative support for clients dealing with pain, injury recovery, or mobility challenges. Known for her hands-on approach and commitment to client success, Cassadei plays a key role in helping individuals return to movement with confidence and strength.

 

She continues to grow her expertise in the wellness field, with a focus on evidence-based solutions that empower people to take charge of their physical health.

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Injury Prevention Practitioner

Larissa Nakamitsu

Born and raised in Makawao, Maui, Larissa is a certified Athletic Trainer with a deep passion for helping others recover, perform, and thrive. A proud alumna of Kamehameha Schools Maui (Class of 2009), she went on to earn her bachelor’s degree in Athletic Training from Brigham Young University.

Since 2013, Larissa has built a well-rounded career supporting student-athletes, active individuals, and industrial athletes through her work with respected institutions including BYU, Mountain View High School, Intermountain Healthcare, King Kekaulike High School, and Kamehameha High School. Her time with Bio Health Care also expanded her expertise in working with industrial athletes and injury prevention in workplace settings.

Larissa is also a proud mom to two beautiful children—an 8-year-old daughter and a 5-year-old son. Balancing family and her professional calling, she brings both heart and experience to her work.

With over a decade of hands-on experience, Larissa remains committed to promoting recovery, mobility, and performance for every client she works with.

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Injury Prevention Practitioner

Caitlin Thuesen, LMT

Caitlin is a licensed massage therapist dedicated to offering a fresh perspective on healing through thoughtful, personalized care. Having personally navigated the challenges of chronic pain, she understands how frustrating and impersonal the healthcare system can feel—and how transformative massage therapy can be in finding lasting relief.

Drawing from both lived experience and professional training, Caitlin approaches each session with compassion, precision, and a clear treatment plan tailored to each employee’s unique goals. Whether they're seeking stress relief, recovering from an injury, or managing chronic pain, her aim is to support the body’s natural healing process—without the pressure to "just push through."

Caitlin is educated in a variety of therapeutic techniques, including deep tissue work, trigger point therapy, myofascial release, and muscle scraping. She is certified in cranial massage and is currently pursuing her Clinical Massage Therapist (CMT) certification to further deepen her practice.

Committed to ongoing education in advanced anatomy and healing modalities, Caitlin believes everyone deserves to feel like their best self—with care that meets them exactly where they are.​

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Injury Prevention Practitioner

Katherine Clark

Katherine is a dedicated healthcare professional with a strong passion for helping others regain movement and improve their quality of life. She holds a degree in Kinesiology and is currently pursuing her Physical Therapist Assistant (PTA) license to further advance her skills and impact
in the field.


She began her career as an Exercise Specialist at an inpatient physical therapy facility, where she specialized in intensive orthopedic rehab. She then continued her professional journey at an outpatient clinic focused on spinal cord and neurological rehabilitation, deepening her expertise in complex neuromuscular conditions.


With a combination of academic knowledge, clinical experience, and a patient-centered
approach, Katherine brings valuable expertise to enhance outcomes and promote lasting mobility.

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Injury Prevention Practitioner

Jennifer Otto, LMT

Jennifer Otto is a licensed massage therapist and certified Reiki practitioner with a passion for holistic wellness. Specializing in full-body massage, Jennifer integrates a variety of therapeutic techniques to create personalized, intuitive sessions that support each employee’s unique needs.

She received her formal massage training from the Hawaii Healing Arts College of Massage Therapy and earned her Reiki certification through Honolulu Reiki. Jennifer serves as an Injury Prevention Specialist with BioHealth Care, where she helps clients enhance mobility, reduce pain, and prevent workplace injuries in addition to her own private practice.

With over 20 years of dedicated yoga practice, Jennifer brings a deep, body-centered awareness to her work, offering a well-rounded approach to healing and relaxation.

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Injury Prevention Practitioner

Kaha'i Auld

Born and raised in Oahu Hawaii, Kaha'i is an alumni of Saint Louis School, has attended the University of Manoa and is currently pursuing his degree as a Physician Assistant. Kaha'i came to BioHealth with years of experience in the health and fitness industry, working closely with sports doctors and has  several years of clinical education.

 

Kaha'i believes in a holistic approach to recovery and the body’s ability to heal itself. Through listening to the body and thoughtful communication, he believes in an individualized plan for every patient.

 

His goal is to assist every physically active person in living their everyday life to the fullest potential and without discomfort. He enjoys focusing on helping the body remember how to work as the cohesive, efficient vessel that it was born to be.

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Injury Prevention Practitioner

Inmi Lee

Inmi Lee is a rehabilitation professional with a strong background in military medicine, exercise science, and patient-centered care.

She served as a Hospital Corpsman in the U.S. Navy, where she provided medical support to Marines in field settings and gained hands-on trauma experience in hospital environments. Her time in the military instilled a deep commitment to teamwork, adaptability, and clinical excellence.

Inmi earned her bachelor’s degree in Sports and Health Sciences with a concentration in Exercise Science and is a certified NASM Personal Trainer. She has worked in outpatient rehab settings, supporting individuals through injury recovery, functional training, and preventative care.

Currently pursuing her Doctor of Physical Therapy degree, Inmi is passionate about helping patients regain mobility, build strength, and improve their quality of life through evidence-based treatment and compassionate care. Her approach blends structure, empathy, and a strong foundation in movement science to support every stage of rehabilitation.

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Injury Prevention Practitioner | Video Marketing

Brody Stephens

Brody is a dedicated professional with over 10 years of experience in the healthcare field bringing a vast knowledge of wellness application to BioHealth Care. 

In the field of Video Marketing, Brody develops engaging visual content that helps brands grow their online presence and connect with target audiences. From content strategy to production, he brings creativity and technical expertise to every project, ensuring high-quality results that drive impact.

As a Personal Trainer, he specializes in creating customized fitness programs tailored to individual needs, helping clients achieve their health and wellness goals through a balanced approach to training, motivation, and accountability. His strong background in customer service ensures a supportive, client-first experience every step of the way.

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Injury Prevention Practitioner

Aolele (Lele) Taulupapa

Growing up in Hawaii, Lele was always physically active and found passion in the sports activities she participated in. While playing sports and participating in P.E in high school, she began to understand the importance of taking care of the human body physically. This drove her to pursue a bachelor’s degree in Exercise & Wellness from Brigham Young University Provo. After obtaining her degree, she now has a deeper understanding of the importance of how proper exercise, a well balanced nutrition, and consistency can be beneficial to your overall well-being. Lele’s aim with BioHealth is to get patients feeling better than before they came in.

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Injury Prevention Practitioner | Administration

Kayla Powell

With a Bachelor's degree in Kinesiology from the University of Utah and over 10 years of experience in the healthcare field, Kayla brings a well-rounded perspective that bridges both clinical and administrative roles. As a dedicated student-athlete at the University of Utah, she balanced the demands of collegiate track and field with a rigorous academic schedule and graduated with honors and a passion for health and wellness.

 

Kayla's experience as a track athlete not only refined her competitive edge but also sparked a lasting interest in the mechanics of human movement and injury prevention. That passion led to her first job working alongside a physical therapist, where she gained valuable hands-on experience working directly with patients. Observing and assisting in treatment plans, rehabilitation exercises, and injury prevention strategies giving her a practical understanding of how the body works under stress and how to keep it functioning at its best.

 

Kayla lives to promote health and wellness through proactive and informed care by supporting patients directly or optimizing systems behind the scenes. She desires to help individuals live healthier, more active lives through education, prevention, and holistic support.

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Marketing Director

Sarah Copley

Sarah Copley is a seasoned marketing professional with a proven track record of driving business success through innovative digital marketing strategies. In her capacity as Marketing Director at Bio Health Care, she plays a pivotal role in advancing their esteemed Workplace Injury Prevention Program by orchestrating comprehensive online promotion through the website, social media channels, and targeted outreach strategies. Drawing from her background, which includes marketing studies at Penn State and over a decade of experience in social media and digital marketing for businesses, Sarah has uniquely positioned Bio Health Care to thrive in its mission. Furthermore, Sarah's founding of a digital marketing agency over 5 years ago, has proven instrumental in generating high-value leads and amplifying sales-ready opportunities for Bio Health Care, particularly through cutting-edge marketing campaigns. Her visionary approach has redefined how Bio Health Care connects with potential clients, allowing the organization to concentrate on its core mission while experiencing substantial growth and success.

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Executive Business Consultant

Bert Szostak

With over three decades of professional business experience, Bert brings a wealth of expertise to the table. For the past decade, he has played a pivotal role as a trusted consultant at Bio Health Care, focusing on driving growth, streamlining operations, and enhancing staffing solutions. Bert's career is marked by a commitment to excellence and a passion for transforming organizations. His partnership with Bio Health Care has been instrumental in achieving exceptional milestones, from optimizing operations to fostering a culture of continuous improvement. His focus is dedicated to crafting tailored strategies that align with Bio Health Care's vision, ensuring that the company remains at the forefront of innovation and success.

Join Our Team

If you're enthusiastic about injury prevention, possess the required qualifications, and are excited about the opportunity to work with Bio Health Care, please review our available positions on our Careers page and apply now!

Schedule a Consult to Learn More About Injury Prevention Solutions
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