This issue also presents numerous perspectives from an ethical standpoint. It is fundamentally immoral for any employee to disclose confidential information to rival companies. Considering that my company did not approach this employee, it is morally permissible to use this information. According to basic ethical theories, the permissibility or impermissibility of actions should be determined by the outcomes. If the outcomes are beneficial, then an action is morally permissible even if the constituent premises are unethical. (Singer, p. 61)
On the other hand, an action is morally impermissible if its consequences are harmful or undesirable. In this particular situation, the constituent premises are unethical but the outcome is desirable.