Which country are you in? In Germany (and most of Europe) such clauses are often void as they are overly unfair for the employee. The legislator usually weighs

Which country are you in? In Germany (and most of Europe) such clauses are often void as they are overly unfair for the employee. The legislator usually weighs the risk of the company against the desire of the ex-employee to advance his/her career. It's hard to see how merely disclosing your former work relationship with a company might harm their interests or violate trade secrets. In general, NDAs and non-competes (which might be more applicable to your situation) are only enforceable if they have a reasonable scope (i.e. list a number of specific companies that you're not allowed to work for instead of specifying an entire industry), a reasonable duration (e.g. 12 to 24 months) and include severance pay that appropriately compensates your opportunity loss. Financial corporations usually have very good lawyers though, so I highly recommend you to get one yourself and have him/her check the no-compete / NDA, as this is a complex legal matter and nothing that can be resolved quickly in an online forum.