They work within a collegial relationship with a physician with whom she can consult or refer a patient.

This locket certainly implies that he was involved in more than a purely collegial relationship with Sarah, wouldn't you say?

Arising from our long-term collegial relationship, we share the college's concern about the welfare and education of the existing cohort of students.

Challenges Adkins and Kyerematen-Jimoh enjoy a productive, collegial relationship, but reverse mentoring presents challenges for business leaders who are used to calling the shots.