STLE Certification Programs

Advance Your Career in Tribology and Lubrication Engineering with STLE's Certifications. 
STLE offers four technical certification programs: Certified Lubrication Specialist™, Certified Metalworking Fluids Specialist™ and Certified Oil Monitoring Analyst I & II™. The STLE Certification Committee oversees the programs to assure they are uniformly administered, consistent with certification best practices as recognized by the National Organization for Competency Assurance and the Institute for Credentialing Excellence, ISO 17024. 

Exam Delivery Methods
Online Exams - New!
This option allows candidates to take STLE certification exams anywhere with a secure internet connection, at a time and date that works best for them. This delivery method uses a lockdown browser and certified proctors via webcam. Online exams offer instant results upon completion of the exam.

In-Network Testing Centers - New!
This option allows candidates to take STLE certification exams at any of our in-network testing centers. (over 1,100 world-wide) at a time and date that works best for them. This delivery method uses the same lockdown browser, but provides candidates with a computer and an in-person certified proctor. In-Network Testing Center exams offer instant results upon completion of the exam. Find a testing center near you here.

To register for an online or testing center exam, complete the Certification Registration form below with your contact and payment information, exam type, and date you intend to take the exam and email to Certification@stle.org. The STLE Certification team will follow up and provide candidates with a voucher code and further instructions on how  to schedule your exam through STLE's Webassessor portal.

Group-Sponsored Exams
Group-Sponsored exams are in-person, paper exams hosted by third-party companies. This delivery method requires the sponsoring company to provide an eligible proctor, suitable location and has a registration minimum of three candidates. You can find all upcoming group exams on the STLE calendar.

To register for a group exam, complete the Certification Registration form below with your contact and payment information, exam type, and date of the group exam and email to Certification@stle.org.

All group exam registrations must be submitted no later than 2 weeks (3 weeks for international) prior to the exam date to ensure all necessary materials are available. Any registrations received past this deadline will not be processed and candidates will be required to register onsite on the date of the exams (limited to first come, first serve basis).

For registration questions, scheduling a group exam, or further assistance, please email Certification@stle.org or call (847) 825-5536.