Meet Our Diagnostic Experts


Jeff Courcier

PT, Board Certified Clinical Electrophysiology (ECS), Fellow MSK Diagnostic Ultrasound (FMSK)
Jeff graduated from Langston University in 1996 in OK. He has had numerous training in orthopedic and manual therapy before suffering a life-altering back injury. After a long process and search for healing and even a failed back surgery, ultimately led Jeff to heal through Manual Therapy through Dr. Edward Stiles, D.O. and 10 years+ training from Dr. Stiles. This became the cornerstone of Jeff’s approach to treatment in P.T.

In 2017, Jeff partnered with H.O.D.S.- Hands-On Diagnostics to add Diagnostic Ultrasound and E.M.G.-Electromyography into INSIGHT Diagnostics Group. Jeff has completed his Fellowship training in EMG. Jeff received the award for “2018 Langston University Outstanding Clinician” Jeff is a natural teacher and loves to educate his patients.

In his free time, he loves to spend time with his wife, Melinda, going to OU Football games with his daughter Carly, and mountain biking with his son Nikolas. He’s currently working toward his Brown belt in Brazilian Jujitsu.


Melinda Courcier

R.P.T., Cert. D.N., Manual Therapist
Melinda graduated from Langston University in 1996. She’s had a variety of experience in Acute Care, Rehab, OKC Schools-pediatrics, and Outpatient P.T. She has been working at INSIGHT Diagnostics Group since 2010. She has had extensive training in Manual Therapy taught by Dr. Edward Stiles, D.O. and Micha Sale, P.T. Melinda is Certified in Functional Dry Needling, Certified in Kinesiotaping, and has completed training in Diagnostic Ultrasound. In 2017, Melinda and Jeff partnered with H.O.D.S.-Hands-On Diagnostics to add diagnostic ultrasound into INSIGHT Diagnostics Group Physical Therapy.

Melinda enjoys treating all ages of people and teaching others to takes charge of their health.

Melinda has been married to Jeff for 23 years. When she’s not working, she enjoys traveling with family, swimming, and supporting local food and entertainment.


David Sirleaf

P.T.A., A.T.C.
Born and raised in Oklahoma City, David began his education by graduating from Bishop McGuinness High School in 2005. He then attended Southwestern Oklahoma State University where he received a Bachelor of Science degree in Athletic Training in 2009. That same year, David became a member of the INSIGHT Diagnostics Group family, where he developed his passion for improving the health and movement for people of all walks of life. In May 2019, he earned his Physical Therapist Assistant degree from Oklahoma Community College.

David has 10 years of experience with therapeutic exercise and has received certifications in Diagnostic Ultrasound, The Functional Movement Screen (FMS) and the fitting of custom orthotics.

David lives in NW Oklahoma City with his wife Robyn and two year old son Jaxon. When not providing health care and treatment, he enjoys spending time with his friends and family. He also likes watching and participating in a variety of sports, especially basketball (Thunder Up!).