The department was created to adequately cater for the interest training needs of the marketing sector of the petroleum industry. The department awards National Diploma and Higher national Diploma, and is made up of four sub units:
On completion of the programme, the individual is capable to serve in related departments of the oil/gas and allied industries.
It established the petrol filling station and the super market for practical demonstrations and on the job development training for trainees. The super market was later transferred to PTI Consultancy Unit as a revenue generating unit of the Institute, even as the department continues to make use of the super market.