[3] Of note, Teyhen served as the Deputy Chief of Staff (Support, G-1/4/6) at the Office of the Surgeon General in Falls Church, Virginia.

Teyhen currently serves as Commanding General to nearly 9,000 personnel assigned to BAMC, the Military Health System’s largest and most complex hospital and sole Level I Trauma Center, located on Joint Base San Antonio-Fort Sam Houston.

; Associate Professor and Director of the Center for Physical Therapy Research for the U.S. Army Baylor University Doctoral Program in Physical Therapy on Fort Sam Houston, Texas; Officer-in-Charge of Task Force 10 Delta Med in Iraq; Chief of Musculoskeletal Care Center and Chief of Physical Therapy at Kimbrough Ambulatory Care Center, Fort Meade; Chief of Outpatient Physical Therapy at Walter Reed Army Medical Center, Washington, D.C.; Chief of Physical Therapy, 21st Combat Support Hospital in Bosnia; and Physical Therapist at (then) Carl R. Darnall Army Community Hospital at Fort Hood, Texas[8] During the pandemic, she served as the Department of Defense's Lead of Therapeutics for Operation Warp Speed at the U.S. Department of Health and Human Services and as Commander, Walter Reed Army Institute of Research, the DoD's largest biomedical research facility.

[8] Teyhen also served as the Deputy Chief of Staff (Support, G-1/4/6) at the Office of the Surgeon General in Falls Church, Virginia.

[13] Her research accomplishments include over 225 peer-reviewed publications, editorials, book chapters, and published abstracts; 120 presentations at conferences; and 150 lectures.