professionalise

/P R AH0 F EH1 SH AH0 N AH0 L IY1 S/
verb
  1. 1

    To make something professional

  2. 2

    To advance an occupation to the level of a profession.

Source: https://en.wiktionary.org/wiki/professionalise, https://en.wiktionary.org/wiki/professionalize