PT WIJAYA KARYA (Persero) Tbk. (WIKA) through the Environmental Social Responsibility Unit (TJSL) supports efforts to increase the expertise of partners in the construction service sector through professional training and certification carried out in collaboration with the WIKA Professional Certification Institute (LPS), as a form of implementing the CSV concept in the company's CSR activities. This is the third time in 2021 the implementation of the certification has been carried out, and since the last 3 years WIKA has certified approximately 400 project personnel consisting of the Foreman/Head Builder, Drafter, Surveyor and other field workers in the project. This time, this activity was carried out for two days at the WIKA Pratama Learning Center and the Jakarta/Bandung High Speed Railway (HSR) Project, namely on 29-30 November 2021 with 13 participants. Materials were provided on the first day, followed by scaffolding practice, assessment and verification in the field to meet the certification requirements on the second day.