div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: PETROLIAM NASIONAL BERHAD - Lean Six Sigma Certification · The International Association for Six Sigma Certification IASSCTM is a Professional Association dedicated to growing src=https:reader036fdocumentsinreader036viewer2022070107602419b0816f03008d5cebf1html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divpPETROLIAM NASIONAL BERHADp p01-2009p pSEPTEMBER 2019p pLEAN SIX SIGMA BLACK BELT AND GREEN BELTp pVerify certificate authenticity and view this provider’s official profile at: https:wwwiasscorgproviderpetroliam-nasional-berhadpdiv