If you are using liferay usergroup you can retrieve associated roles through UserGroupRoleLocalService.
Add this code after your:
#set($userGroupRoleLocalService= $serviceLocator.findService("com.liferay.portal.service.UserGroupRoleLocalService"))
#set($ugUsrRoles = $userGroupRoleLocalService.getUserGroupRoles($user.getUserId()))
#foreach( $ugUsrRole in $ugUsrRoles )
<p>$ugUsrRole.getRole().getName()</p>
#end
This is an interesting list of all the liferay objects available in velocity: Access Objects from Velocity