How to find employees roles they are not logged in as

I am attempting to write a user event that loads in an employee and finds all roles they are assigned to, and then based on those results determine what to do with the page (if they belong to a certain role, regardless of what role they are in as I want them to see the page, otherwise throw an error saying they do not have access).

Here is the code I have come up with so far:

var user = context.getUser();
var employeeRec = nlapiLoadRecord('employee', user);
var roles = employeeRec.getFieldValues('nlrole');
for (var i=0; i<roles.length; i++){
nlapiLogExecution('AUDIT', 'Employee', roles[i]);