Retrieving project owner name

Project Server 2013

We have a page hosted in SharePoint that needs to display the owner of projects that the current user has access to.  We have the project GUID for each project, but are not able to get the owner of the projects unless we basically give users full control of PWA (which is not acceptable).

We are using the JavaScript CSOM for Project Server 2013.  The code is similar to the following:

owner = context.get_projects().getByGuid(projectGuid).get_owner();
context.load(owner);
context.executeQueryAsync(ownerLoaded, queryFailed);

function ownerLoaded(sender, args) {
	var owner_name = owner.get_title();
}