Yes. If you change professions, or change the focus of your current business, you may change your category within your current Chapter assuming that category is available. If it is not, you may be able to transfer your Membership to a Chapter close by. In either instance, you will need to submit a new Application representing the category change, for approval.
Keep in mind that when you change categories, you may no longer represent your former category and it is open for a new or existing Member. You may also experience a period of time when you do not receive Leads as the Members need time to acquaint themselves with your new focus.