Skip to main content Republic of Slovenia SPOT
State portal for business entities

Informative Notice

Certain content is still being edited. Thank you for your understanding.

Water preparation operator

A water preparation operator operates machinery and devices for water preparation with full demineralisation with total capacity exceeding 15 m3/h.

The operator can perform tasks if they have an appropriate education, work experience and professional qualification.


  • The work and tasks of a water preparation operator may be carried out by:

    • workers with secondary vocational education (level 4) acquired on the basis of the educational programme in chemistry, mechanical engineering or electrotechnology with at least two years' work experience;
    • or workers with short vocational education (level 3) acquired on the basis of the educational programme in chemistry with at least five years' work experience.


    Copy of evidence of the conclusion of education and certificate of suitable work experience from the employer

    Legal basis

  • Applicants must undergo a professional and practical training programme.

    The professional training programme comprises general and special parts.

    Applicants' professional competence is verified with a test of knowledge. The final success of the test is established by the examination board with “pass” or “fail”.

    Applicants may retake the test twice. If an applicant fails the test in one or two subjects, only the test in that subject is repeated. If an applicant fails the test for the third time, they must undergo professional training again.

    The price of professional training and tests of knowledge is calculated in accordance with the price list.

    Applicants who pass the test are issued a certificate of professional competence.

    The certificate is valid for five years. After the certificate expires, applicants must occasionally take a written test. When taking the occasional test, applicants receive a test paper with questions from the general and special parts of the programme. The test paper includes three questions from each subject with one correct and two incorrect answers.

    The test in each part is passed, if the answers to at least two questions are correct. Workers must also undergo practical training in energy devices. During practical training, workers carry out practice supervised by their mentors. The duration of practical training is two months.


    Certificate of professional competence

    Legal basis

Recognition of qualifications acquired abroad

There are following systems for the recognition of professional qualifications acquired in the EU:

Cross-border provisions of profession

Performance of the profession in Slovenia is possible on cross-border/temporary basis. Prior to commencing the service, you must submit a written application to the competent authority.