OSS-DB Gold Certified Engineers

Engineers capable of improving, operating and managing a

large-scale database system 
with consulting ability

About OSS-DB Gold

 Certification name OSS-DB Gold 
 Exam name  OSS-DB Exam Gold
Exam version name Version 2.0 ( PostgreSQL 10 and PostgreSQL 11 )
Version 3.0 ( PostgreSQL 12 to PostgreSQL 14)
 *) Until January 31, 2024, you can choose to take the exam of either version. 
Advantage of being certified as OSS-DB Gold

This proves that a certified engineer has the following skills and knowledge.

  • In-depth Knowledge of RDBMS and SQL
  • In-depth knowledge of open source database
  • Can operate and maintain a large-scale database system using OSS-DB, such as PostgreSQL

  • Can develop a large-scale system using OSS-DB, such as PostgreSQL

  • Is familiar with the internal structure of OSS-DB, such as PostgreSQL

  • Can optimize the performance of an open source database system

  • Can verify the use and condition of OSS-DB, such as PostgreSQL and troubleshooting 


Work experience is not required to take the exam, but an "Active certification status(*) of OSS-DB Silver" is required as a prerequisite.
If your purpose is solely to take the exam, then it is possible to take OSS-DB Exam Gold first.
(Note that OSS-DB Gold cannot be acquired until you acquire OSS-DB Silver.)


(*)Once a person is certified OSS-DB Silver or OSS-DB Gold, recertification within "5 years" is required to RETAIN an ACTIVE certification status.


Overview and Information for Taking the Exam

 Duration of learning  From two weeks to one month as a general guide
 Exam cost 16,500 yen per exam (in Japan)
150 USD (w/o tax) per exam (outside Japan)
 Number of questions

30 per exam

 Examination method

Computer based testing (CBT). An examinee answers approximately 

30 questions online using a computer. 

Most questions are multiple-choice answered by using a mouse;however, some questions require keyboard entry.  

There is no hands-on certification test or interview.


 Exam date/place

Select a desired date and location freely

from various parts of the country when you apply for the exam.

The duration of the exam is 90 minutes including a simple questionnaire after the exam.


Contact the following test center for details of exam date and place.




 Taking an exam

Step 1: Register

You must register online to receive an EDUCO identification

number (EDUCO-ID) first.Failure to complete this step

may effect your eligibility for your desired time slot.

Also you must provide your EDUCO-ID to the test centers

when registering for an exam. 

Registration is free of charge and is completed here at the LPI-Japan web site.


> Register for EDUCO-ID


Step 2: Schedule to Take an Exam

OSS-DB exams are delivered through a number of

different methods; choose one that's most convenient:

You must provide your EDUCO-ID to the test centers when

registering for an exam. If you do not provide your EDUCO-ID, your exam may not get loaded. 

You can register for OSS-DB exams through one of the thousands of Pearson VUE testing centers worldwide.

Once you have located a convenient Pearson VUE center,

you may schedule to take an OSS-DB exam either online or by phone.



> Schedule exam through Pearson VUE


> Locate a Pearson VUE Test Center 


> Schedule exam at a Pearson VUE Center (Online or by Telephone) 




Step 3: Take the Exam

Exam result  You will receive your exam results immediately upon completion.


After Passing the Exam

When you pass "OSS-DB Exam Silver" and "OSS-DB Exam Gold", it means you
are certified as "OSS-DB Gold".
Certification card
These will be sent to you three weeks after taking the exam.
Certification logo

This logo can only be used on a name card, etc. by the engineers certified as "OSS-DB Silver".
The logo can be downloaded from the following:

Use the following phrase when you indicate the certification with words.

OSS-DB Silver Certified Engineer
Open Source Software Database Professional Certification Silver Certified Engineer


 Active certification status
(Recertification policy)

There is no validity period, but there is an "*) active 

certification status (recertification policy)".

To RETAIN an ACTIVE certification status,

a certification holder is REQUIRED to recertify

within 5 years from the certified date.

Or you need to acquire the OSS-DB Gold certification within five years.


*) About "Recertification Policy"


Once a person is certified by LPI-Japan and receives a

certification designation (OSS-DB Silver, OSS-DB Gold), 

recertification is recommended after two years

from the date of the certification designation to retain a

current certification status. However, to RETAIN an ACTIVE certification status, a certification holder is

REQUIRED to recertify within 5 years of the certification designation.

Recertification requires that the individual candidate

passes all up-to-date exams that are only required for

the highest earned certification designation. 

After successful recertification, the designation status will be updated to ACTIVE for a period of FIVE years.