The job vacancies in blue and grey-collar segments have jumped four times in the last one year (from November 2021 to November 2022), driven by digitisation, automation and changing work models, according to a report. The number of job vacancies in the blue and grey-collar industry increased by 301 per cent in the past year to over 1,05.42 lakh in 2022 from over 26.26 lakh in 2021, according to data on the Billion Careers platform, a subsidiary of Quess Corp.