Mr. Arum Joseph Sunday was posted to the National Salaries, Incomes and Wages Commission on 10 May 2000 from the Office of Accountant-General of the Federation as Accountant 11 but later transferred his service to the Commission in 2011. He was posted to the Internal Audit Unit of the Commission in September 2018 to understudy the two key officers in the Unit (Mr. Henry Egbe- Director and Mr. S. Ademiju- Asst. Director) who are due to retirement in 2019. Before then he worked as the Head of Salary Section and Final Account Section in the Finance and Accounts Department of the Commission.

Mr. Arum graduated from Enugu State University of Science and Technology (ESUT), with B.Sc, (Accountancy) in 1998. He did his National Youth Service Corps (NYSC) at Sokoto State Ministry of Education in 1999. He is a member of the Association National Accountant of Nigeria (ANAN).