 The biggest employers of ADIT professionals are the “Big Four”, major international law firms, industry and commerce, and revenue authorities.A candidate who successfully completes ADIT is awarded the ADIT credential and can use the letters ‘ADIT’ after their name.Candidates who wish to adhere to professional requirements by retaining an ongoing link with the CIOT can apply to become an International Tax Affiliate of the Chartered Institute of Taxation (an “Affiliate”).