Tammy Longnecker ~ Scheduling Coordinator

Tammy was born and raised in Carrington, ND.  She graduated from Valley City State University    

with an Associate Business Degree.  She lives in New Rockford with her husband Corey.  In her spare time, she likes camping, reading and cooking.

Brooke Kollman ~ Dental Assistant

Brooke grew up in Jamestown and has worked in the dental field for the past ten years. She graduated from Rasmussen College with a degree in medical administration and then went on to obtain her dental assisting license in 2015. She is married to her husband, Justin and has two boys, Jayce and Easton, who keep her very busy. In her free time she likes to be with family, help with her husband's side business and spend time at the lake.

Dr. Amy Ellingson


Dr. Ellingson, a Grand Forks, ND native, attended both the University of North Dakota and the the University of Minnesota School of Dentistry, where she graduated with her DDS in 2013. She enjoys building relationships with her patients & helping them to feel better about their smile. Dr. Ellingson is a member of the American Dental Association and the North Dakota Dental Association She enjoys going to continuing education and learning new techniques to treat patients.  Amy lives in town with her husband, Noah. Dr. Ellingson is an avid UND sports fan, and enjoys cooking, traveling and being active.

Jane Tweed ~ Dental Assistant

Jane has been in the dental field as a Registered Dental Assistant for 28 years.  She joined the James River Dentistry team in 2004.  Jane lives in rural Tolna and enjoys spending time with her husband Grant and two sons, as well as family, friends, sporting events and being outdoors.

Allison Pfeiffer ~ Dental Hygienist

Allison was born and raised in Sheyenne, ND.  She joined the team at James River Dentistry in May of 2010, after graduating from NDSCS in Wahpeton with a certificate in Dental Assisting & Associates degree in Dental Hygiene.  She lives in rural New Rockford with her husband Matt, son Jase and dog Max.  In her spare time, she enjoys spending time with her family & friends and being outdoors.

Merritt Engels ~ Dental Assistant

Merritt began dental assisting more than thirty years ago at James River Dentistry & continues to enjoy getting to know each patient.  Family and lake time are her passion.  Creating photo albums and quilting are her hobbies.  Merritt and her husband Joe have two grown sons.

Beth Belquist ~ Office Manager

Beth started with James River Dentistry as a dental assistant in June 2006.  She has now been at the front desk for nine years.  She was raised in Sheyenne, ND & currently lives in New Rockford with her husband Elliott and their 3 children: Bo, Kelsie, & Emmie.  When not at work, Beth enjoys time with her family, friends, ladies night and attending any sporting event.

Tracy Allmaras ~ Dental Hygienist

Tracy was born & raised in New Rockford, ND.  She graduated from NDSCS in Wahpeton in 2011 with an Associates Degree in Dental Hygiene.  She joined the James River Dentistry team in 2011.  She enjoys getting to know her patients & helping them maintain their healthy smiles.  Tracy, her husband Michael, son Asher and daughter Jersey live in rural New Rockford. In her spare time, she enjoys spending time with family & friends, being outdoors and cooking.

Call Us: (701) 947-2354

Dr. Robert Cudworth

Dr. Cudworth, a University of Minnesota School of Dentistry graduate, has been practicing since 2003, when he joined James River Dentistry. Originally from Sheyenne, ND, Dr. Cudworth attended Jamestown College. He actively participates in continuing education and keeping up-to-date with the latest dental techniques.  He is a member of the American Dental Association & the North Dakota Dental Association.   Robert enjoys spending time with his wife Amy and their 4 children, Mya, Keaton, Logan and Dylan.  In his spare time, you can find him golfing, hunting, & watching sports.

Jodi Guler ~ Dental Assistant

Jodi attended Bismarck State College, where she earned a degree in Medical Assisting. She joined the James River Dentistry team in December 2012.  She lives in New Rockford with her husband Josh, daughter Elise and son Emmett. In her spare time, Jodi enjoys being outdoors ,traveling & most of all spending time with her family.