Receiving orders for work from clients and assign them to freelancers. But, I am not from IT business but administration.
As admin, it is unlikely that you will have a portfolio. Instead, you should create a solid CV and present this when asked for details about previous work.
In addition, speak to your current/previous employers and ask if they would be happy to write you a reference, or a recommendation on linkedin.
A portfolio can give you an idea of the quality and style of a freelance designer. witch can be a helpful tool to made decisions (witch work, witch frelancer). But if you don't have a background or experience in design it will be pretty useless.
I never find much use in a portfolio from a developer/programer because a portfolio is more visual and development have many relevant background aspects that a portfolio can show.
If you can get reference letters from previous customers/clients I would add to your portfolio page words such as " On specific request, if required during negotiations, we can present letters of recommendation from past and present clients."
PS what is "&" mistype in the English text.