Certificates of management systems
| Company | Certificate | Status |
|---|---|---|
| WORLD C.D.M CO., LTD. | ISO 9001:2000 | withdrawn |
| World Consult, a. s. | ISO 9001:2015 | valid |
| WORLD DEVELOPMENT FOUNDATION | ISO 9001:2008 | withdrawn |
| WORLDSCAN ENGINEERING PTE LTD. | ISO 9001:2015 | valid |
| WORLDSCAN ENGINEERING PTE LTD. | ISO 45001:2018 | valid |
| WORLTEC | ISO 14001:2004 | expired |
| WS BUILDER ENGINEERING PTE. LTD. | BS OHSAS 18001:2007 | withdrawn |
| WUSAM, a.s. | ISO 9001:2015 + ISO 3834-2:2005 | valid |
| WUSAM, a.s. | ISO 14001:2015 | valid |
| WUSAM, a.s. | ISO 45001:2018 | valid |
| WUSAM, a.s. | ISO 9001:2015 | valid |
| WYVAN TECHNOLOGY PTE. LTD. | BS OHSAS 18001:2007 | withdrawn |
| X&J CONSTRUCTORES S.A.C. - X&J S.A.C. | ISO 37001:2016 | valid |
| XARPOS NIKOLAOS & Co O.E | ISO 22000:2005 | withdrawn |
| XATZIPETROU DIMOSTHENIS | ISO 22000:2018 | valid |
| XENIA PALACE PORTARIAS S.A | ISO 9001:2008 | withdrawn |
| Xepap, spol. s r.o. | ISO 14001:2015 | expired |
| Xepap, spol. s r.o. | ISO 9001:2015 | expired |
| XRISTOS BLAXOGIANNIS & Co O.E | ISO 22000:2005 | withdrawn |
| XSolut GmbH Waldemarstrasse | ISO 9001:2008 | withdrawn |