The user profile photo can be edited by the Super administrator or an Admin or Portal User with the correct permissions to do so, by going through the Web Portal > Users View Users > Edit. By clicking on the edit pencil you can edit the user profile details and image. 

The image on the user profile can be used in Job Type template as placeholder within communication. For example an email can be sent to the customer regarding a job to show a photo of the person who will be attending the job.