Headmaster provides Ohio Lead Abatement testing and certification services.
Effective February 26, 2026, Ohio Lead Abatement testing has been updated to Headmaster's TMU testing platform. See the Candidate Handbook for detailed information.
Sign in to register, schedule, and manage your Ohio Lead Abatement exam.
Effective February 26, 2026. Download to your device before test day.
The Ohio Department of Health enters candidate information in TMU. Sign in to set up your login, schedule testing, and review exam instructions. Refer to the Candidate Handbook for full requirements.
What to expect for the knowledge exam.
Print and submit if you are eligible for VA licensing and certification test reimbursement.
TMU candidate guide for signing in and recovering your account.
Schedule or change an Ohio Lead Abatement test event in TMU.
Request testing accommodations.
Request a refund of testing fees that have already been paid.
Test Administration Services Entities hire and supervise local testing teams. Start with the Ohio Lead TASE agreement. Knowledge Test Proctor and test site applications are listed here as well.
Ohio Lead Abatement Testing Administration Services Agreement.
Apply to administer the Ohio Lead knowledge exam as a Knowledge Test Proctor.
Apply for a facility to become an approved Ohio Lead test site.
D&S Diversified Technologies / Headmaster
PO Box 6609
Helena, MT 59604
Testing toll-free: 888-401-0462
Fax: 406-442-3357
Email: ohlead@hdmaster.com