Headmaster provides General X-Ray Machine Operator (GXMO) testing and certification services for Ohio.
As of October 2023, testing uses Headmaster's TMU software. Instructors who need a login to enter students should contact ohio@hdmaster.com.
Sign in to register, schedule, and manage your Ohio GXMO exam.
Effective May 2025. Download to your device before test day.
Start in Ohio X-Ray TMU to apply for the GXMO examination and review exam instructions. Refer to the Candidate Handbook and ODH radiologic licensure resources for full requirements.
Apply online for the Ohio GXMO examination in TMU.
What to expect for the knowledge exam.
ODH GXMO didactic syllabus updated February 3, 2025.
Print and submit if you are eligible for VA licensing and certification test reimbursement.
Ohio Department of Health radiologic licensure information.
Workshop information for Ohio GXMO instructors. Contact ohio@hdmaster.com if you need a TMU login to enter students.
Exam instructions used by Ohio GXMO test observers.
Review the Ohio GXMO test site agreement.
D&S Diversified Technologies / Headmaster
333 Oakland Ave
Findlay, OH 45840
Phone: 877-851-2355
Fax: 419-422-8328
Email: ohio@hdmaster.com