Our Staff

Ryan Volz

Registered Dietitian


Ryan Volz is our Registered Dietitian and Dr. Volz's wonderful husband of nearly 8 years. Ryan graduated from Life University in 2002 with a degree in Dietetics. He completed his one year internship at Barnes-Jewish Hospital in St. Louis, Missouri to become a REGISTERED Dietitian. People often wonder what the difference is between a Registered Dietitian and Nutritionist. The biggest difference is the amount of education an RD must have; 4 years with a 1 year internship and the exam to pass to have the credentialing. Ryan's focus is on preventative care and teaching healthy and natural lifestyle/habit changes for the well being of the body. Ryan specializes in nutritional counseling and supplying quality supplements and vitamins to help people regain and maintain their optimal health. Ryan also cares for people with diabetes, high blood pressure, high cholesterol and many other health challenges. In addition to being a husband and RD, Ryan is also an amazing father to he and Dr. Volz's 3 children, Jake, Jordan and Hayden.




Brenda Clark

Chiropractic Assistant


Brenda Clark is the wonderful mother of Dr. Volz and has been working at the office longer than any other staff member. Actually, she helped open the office in October 2005. Brenda and her husband, Jim, have owned & operated a packaging and shipping business in Okemos called PostNet since 1995. Brenda has two daughters, five grandchildren (all 4 years old and under) and has been happily married for over 36 years. In addition to working at the office she is now a full time grandma and helps both of her daughters often with her grandchildren!!





Christina Castonguay

Chiropractic Assistant

I moved from Ann Arbor to Holt in March of 2014. I worked for a Chiropractor when I was in High School and have been under Chriopractic care my whole life. I attended college at Rosedale Bible College in Ohio and received my Associates degree in General Education with emphasis on music and acting in 2007. I became a CNA in 2007 but missed working in the Chiropractic field, so I became a Chiropractic Assistant in 2008 and have never looked back! My favorite part of working in this field is being able to watch people walk out of the office looking and feeling better without drugs or surgery. I love the outdoors and enjoy spending time with my husband Zac and my 2 children; Zeva and Balor. My passions include music, drama and children.


Treair Boos

Office Manager

I grew up around Eaton Rapids and have lived around the area my whole life. I currently reside in East Lansing. I spent about 12 years in the financial industry when I found myself wanting to pursue my passion of working in the medical field. Then I found myself here at Volz Family Chiropractic. I have been with Volz Family Chiropractic for almost 2 1/2 years. I have been with my husband Randy for 8 years and we just celebrated our 3rd wedding anniversary. I am also a proud mom to our daughter Taillor. I enjoy bowling and watching my daughter in color guard. I am also a big fan of the Detroit Tigers and Lions as well as a big reality TV follower, especially Big Brother. I have a serious obsession to the color purple and am a collector of dolphins. I love getting to know all our patients here at VFC and am always looking forward to meeting our new patients!


Kelly West

Chiropractic Assistant

I grew up in Holt and have lived in the area my entire life. Go Holt Rams! I have an awesome family. My husband and I have been married nearly 30 years. I have a son, daughter, son-in-law, and 2 grandsons that I absolutely adore. I enjoy reading, kayaking, going to the beach and warm weather. My favorite times are hanging out with my family and friends. I've been at Volz Family Chiropracitc since 2016 and I love our amazing doctors and staff. We have some of the greatest patients too!


Katelyn McCausey

Chiropractic Assistant

After graduating from Great Lakes Christian College in the spring of 2017, I was looking for a job that would allow me to work with people. I found myself here at VFC. I am so glad that I have had the chance to be here for a little over a year and half now! I enjoy being able to play a small part in watching people's lives be imporoved and changed through Chriopractic care. We have the best D.C.'s and patients and I feel so honored to be able to serve here.

Outside of the office, I love spending time with my husband, Nolan, and my border collie, Quincy. My husband and I have been married for a little over a year and are hard at work at building our music teaching studio. It's been quite an adventure! My favorite days are spent with them outside and playing Pokemon Go at the lake.