CERTIFICATE OF COMPLETION
This is to certify that Nathan John Siahas successfully completed the Holcim Academy Course for Sustainable Construction in
Life Cycle Stages of Construction Projects and Productsa program offered by Holcim.
Miljan Gutovic
Chief Executive Officer Holcim
Carmen Diaz
Chief People and Sustainability Officer Holcim
Holcim Academy Certificate:
Issued November 1, 2024
Valid Certificate ID
648027113b1f43f4a14d06f8a6357a45