Most pediatricians have practices by themselves or in settings with other pediatricians and Physician Assistants or Nurse Practitioners. By "working with", if you mean who do they know...they know...
A paediatrician is a doctor for children. He/she would perform the same procedures that a general practitioner or adult doctor would, but has studied more specifically to treat children.
Their patients are children and their families. Pediatricians working in offices will have colleagues including nurses, medical assistants, and administrative employees. In their work, they'll...