STLE Certification Program FAQs

How do I register for an STLE exam?
Complete the exam registration form linked below.

The registration form is in the Submittable STLE Forms Library. You will be required to login with your STLE account. If you do not have one, you’ll have the opportunity to create one. If you have a question about the login process, please contact

After I register for the exam, what is the next step?
STLE will review and process your registration. Then STLE staff will send an invoice that you can pay online in your STLE profile.  Once paid, STLE will send you a detailed email and voucher code with further instructions for scheduling your exam through STLE’s online exam portal, Kryterion Webassessor.

If you are registering for a group exam that is being hosted in person through a third-party company event, please follow the same steps, but note that there is a three-registrant minimum before STLE will proceed with processing registrations.  Unpaid exams will not be processed.

How much does the exam cost?
STLE Members - $450.00 USD, Non-STLE Members - $625.00 USD, STLE Member Retake - $225.00 USD, STLE Non-Member Retake - $305.00 USD.

How long do i have to take the exam?
You will have 180 minutes to answer 150 questions

**Candidates are eligible to retake the exam as soon as 6 months from the month of their last attempt.

What is it like to take an online exam?
This video takes you through the process. Example of an Online Exam 

What computer requirements are needed for remote exam?
You can see the full list of requirements through this link: Online Testing Requirements: What You Need to Know ( It is recommended that you do this BEFORE your schedule your exam. Please note that you will need to be an admin of the computer that you are using. It is recommended to use a personal computer and not a work one.

When will I receive my exam results?
Online and onsite (Kryterion testing centers) provide you with immediate results and feedback upon completion of the exams. 

I took the online exam but didn’t receive my results. 
Candidates receive immediate results and feedback through the online exam. If you did not receive your results, it is recommended that you check the email used in the Webassessor account to confirm it is correct. If you need additional assistance, please contact us at or (847) 825-5536.

I took the exam and passed. When will I get my certificate and digital badge?
You will be listed on the STLE website's Certified Professionals page within a week of your results if not sooner.  Your digital badge and certificate will be emailed to you within 7-10 business days.  Please check here for more instructions on how to accept your badge. Watch for the email from (  in  7-10 business days to accept them.   Please check your STLE profile to ensure all of your contact information is up to date.

Where can I find
 in-person courses to prepare for the exams? STLE does not currently offer in-person courses. It is recommended that you reach out the below list of providers to see what they have available.

Ken Kizer
Cell: 563-590-8571
Exam: CLS or OMA I

Rüdiger Krethe
OilDoc GmbH
+49 8034 9047700
Exam: CLS (English & German) or OMA I

Tim Skully
Direct: 216-251-2510 ext 120
Exam: CLS or OMA I