Meet Our Team
Our team combines chiropractic, functional health, and supportive front desk care to make your experience seamless from the moment you walk in. Meet the people who help keep your visits smooth, stress free, and focused on your health.
Dr Justin Cosgrove, DC, MS
Dr. Justin Cosgrove is a Warrenton native, U.S. Army veteran, and chiropractor with advanced training in sports medicine and functional health. He brings an evidence based, movement focused approach to care, helping patients improve performance, recover from injury, and support long term health. Outside the clinic, he enjoys strength training, archery, trail running, and time with his family.
Dr Sabriah Postma, DC
Dr. Postma brings a thoughtful, patient centered approach to chiropractic care, blending adjustments, acupuncture, soft tissue work, and exercise therapy. With a background in exercise science and experience working with athletes and active adults, she helps patients of all ages stay mobile and confident in their bodies.
Rachel Anders, LMT
Rachel Anders is a licensed massage therapist dedicated to helping to reduce the effects of stress on the body, relieve pain, and reconnect clients with their overall well-being. Her approach combines therapeutic bodywork with a calming, client-centered experience designed to support both physical and mental wellness. Rachel believes that every massage should be tailored to the individual’s unique needs, ensuring each session promotes relaxation, recovery, and long-term health.
Rachel is passionate about creating a peaceful environment where clients feel heard, respected, and genuinely cared for from the moment they arrive.
Meet our team
Click to learn about each of our wonderful team members whom our office could not function without!
Meghan,
RN, BC-FMP
Bethany
Chiropractic Assistant
Sara
Chiropractic Assistant
Bethany, CA
Bethany has been working at our office for two and a half years. She, along with her husband Dean and their three children, moved from Indianapolis to Warrenton MO 7 years ago. She loves health & fitness, being outdoors, and traveling with family and friends. With health & fitness being an important part of her life, she really enjoys working at Steadfast Spine & Sport & learning each day how God can use functional medicine to help heal our bodies.
Sara, CA
Sara joined the Steadfast team in 2025 and has loved getting to know each of our patients. She brings a background in medical billing and coding, with a strong focus on accuracy, organization, and teamwork. Outside of the clinic, Sara enjoys spending time with her family, especially fishing and relaxing at the lake. At home, she stays busy with three cats and one dog who keep life fun and full.