Christina Siegfried - Chief Executive Officer (CEO) & President

Christina Siegfried, BSPhy, RDMS  

Chief Executive Officer (CEO) & President

Tina Siegfried graduated from Triton College in River Grove, Il and has been a Diagnostic Ultrasound Technologist for over 20 years. She took a full-time position at Northwestern Hospital in Chicago, Il where she gained extensive experience in post liver transplant ultrasound imaging. Her favorite part of her early clinical work was as a preceptor, helping new students excel during their clinical externship rotations.

Tina went above and beyond exploring the skills needed to perform ultrasound examinations with students and spent off hours tutoring them. She started building ultrasound education curricula in 2005 and has been perfecting ultrasound program curricula ever since. She worked as a Program Director for two ultrasound programs in Denver, Colorado. Tina founded Wolf River Diagnostic Learning Center (WRDLC) in 2014 with the intentions of allowing students to learn at their own pace.

Tina observed the difficulties with ultrasound education, especially physics, and graduated from the University of Colorado, Colorado Springs with a bachelor's of science in physics.

Her role at WRDLC is to teach the physics course and continues to tutor and mentor students and sonographers who are needing help with mastering the craft of diagnostic ultrasound.

Jillian S. Nickerson, MS  

Chief Technology Officer (CTO)

Growing up, Jillian Nickerson had two passions in life - science and computers. Her love of astrophysics and computer science led her to pursue an M.S. in Atmospheric and Space Science with a Certificate of Graduate Studies in Computer Science and Engineering from The University of Michigan, Ann Arbor. She did her undergraduate studies at The University of Colorado, Boulder where she earned a B.A. in Astrophysical, Planetary, and Atmospheric Science and a B.A. in Physics.

Jillian's unique background in science, technology, and classroom instruction lead her to a career in educational technology (EdTech). Throughout her career in EdTech, she has worked with academic institutions and nonprofit organizations to improve the accessibility, delivery, and student learning retention of online education. As Wolf River's CTO, she is a vital asset to our team.

Prior to her career in EdTech, Jillian was an instructor of Astronomy and Physics at the undergraduate level. Her courses introduced students to the skills required to think critically about the physical world and offered students experience in solving real-world problems.

In graduate school, Jillian studied the space environment of planets and comets. Colloquially known as “space weather” her studies investigated how the solar wind affects the magnetospheres, ionospheres, and upper atmospheres of these objects.

In her free time, Jillian continues to independently study topics in science, technology, philosophy, and theology. She enjoys reading, spending time with her dog, practicing yoga, mountain biking, and camping.

Jillian S. Nickerson - Chief Technology Officer

Tam McDowell - Program Coordinator

Tam McDowell, RDMS, RVT, RDCS  

Program Coordinator

Tam McDowell has been a Registered Diagnostic Medical Sonographer since 2012. She has worked in a variety of settings ranging from a small 10 bed critical access hospital to a 900 bed regional transplant center. She earned her BGS at the University of Nebraska Kearney; and holds a Certificate in Diagnostic Medical Sonography from Washburn University in Topeka, KS .She is registered in Abdomen, OB/gyn, Vascular Technology and Adult Echo.

Tam has taught and lectured for numerous EMT classes over the last 20 years. She has served as a clinical instructor for Washburn University’s Diagnostic Medical Sonography program; and for Aurora St. Luke’s Hospital in Milwaukee Wisconsin. Helping students master new skills is her favorite part of the job.

In addition to her role as Wolf River Diagnostic Learning Center’s Program Coordinator, Tam currently works as a staff sonographer at a small hospital in rural Montana.

Krista Nickerson, RDMS, RVT  

Student Ambassador

Krista Nickerson is a hardworking mother of 2 wonderful children. She obtained a Bachelor's of Arts in kinesiology in 2010. During her undergraduate studies, a friend introduced her to the world of diagnostic ultrasound and she knew it was the career for her. In 2015 she enrolled at Wolf River Diagnostic Learning Center. With a fascination for the human body and passion to help patients through the use of a safe imaging modality, Krista pursued a career that would allow her to work independently under the supervision of a radiologist or physician.

Her favorite class was vasculature and her area of interest is working in vascular ultrasound labs followed very closely by abdomen and small parts. Coming from a background in kinesiology, her extensive knowledge of anatomy helped her seamlessly transition into understanding the appearances of disease pathologies and anomalies using diagnostic ultrasound.

In addition to her extensive knowledge of anatomy, her strengths are in multitasking and her ability to scan, annotate, and analyze images quickly.

Krista graduated in 2018 and is now a registered diagnostic vascular tech (RVT) and has acquired a traveling job in Colorado, USA.

Krista Nickerson - Student Ambassador