White-collar hiring grew marginally by 2% year-on-year (YoY) in September, driven mainly by record growth in Artificial Intelligence and Machine Learning (AI/ML) roles, followed by the auto sector, a report said on Friday. White-collar hiring remained largely steady in September, growing 2% YoY, with the Naukri JobSpeak Index reaching 3,053 compared to 3,002 in the year-ago month, according to a report by Naukri.com, Info Edge's flagship brand.