nondealer
/ˈnɒndiːlər/Definitions
1. noun
A person who is not engaged in or associated with the business of dealing in something, especially stock or securities.
“The nondealer in the group was surprised by the complexity of the financial transactions.”
2. adjective
Not dealing or associated with a particular business or activity.
“The nondealer in the company was tasked with reviewing the financial reports.”