Involving additional staff members in PhD supervision (beyond co-supervisors) Is it possible that a staff member (Asst. Prof.) offers their help to a PhD student even they are not their co-supervisor ?
How involved (if solicited) could Lab members (mostly Asst. Prof.) be in the research of PhD students.
Thanks for the clarification.
That's fairly common (at least in my field). In a CV, the involved staff member could specify their role in this PhD project as &quot;assisting supervision&quot;, to distinguish it from a  formal/official co-supervision role. Of course, such an involvement should be discussed with the formal supervisors first, since it might otherwise lead to tensions.